CN104010174A - Image processing device and image processing method - Google Patents
Image processing device and image processing method Download PDFInfo
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- CN104010174A CN104010174A CN201410201465.3A CN201410201465A CN104010174A CN 104010174 A CN104010174 A CN 104010174A CN 201410201465 A CN201410201465 A CN 201410201465A CN 104010174 A CN104010174 A CN 104010174A
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Abstract
The invention provides an image processing device and an image processing method. The image processing device and the image processing method aim to restrain false colors and moire generated in a high frequency region. Color interpolation circuits (300 and 350) of a color aberration signal generation circuit (104) separate image signals obtained from a camera device into image signals of the color filters (R, G1, G2 and B) and conduct interpolation processing on the image signals of all the color filters, wherein the camera device is provided with multiple color filters in a preassigned pattern, and pixels corresponding to the color filters are set in the camera device; next, a false color judgment circuit (360) judges whether a target region is the high frequency region or not in the target region according to the slope rates of the image signals of the filter G1 and the filter G2 and at least one difference between the image signals of the filter G1 and the image signals of the filter G2.
Description
The application is to be the divisional application of the PCT application (international application no is PCT/JP2009/067741) that on October 13rd, 2009, national applications number are 200980161949.7, denomination of invention is " camera head " applying date.
Technical field
The present invention relates to a kind of image processing equipment of the impact that can reduce the noise in high-frequency region.
Background technology
Traditionally, by the surrounding pixel that uses object pixel, object pixel is carried out to color interpolation, as the method for the false colour for suppressing the high-frequency region that occurs in subject.
With reference to Figure 16, the example that the picture signal of the pixel output by explanation to the redness (R) from bayer-pattern configuration, green (G) and blue (B) filter is carried out the processing of color interpolation.
In Figure 16, the G filter being positioned in the horizontal direction of R filter and the vertical direction of B filter is called to G1 filter, and the G filter being positioned in the vertical direction of R filter and the horizontal direction of B filter is called to G2 filter.And, represented respectively from the signal of the pixel output corresponding with G1, G2, R and B filter by G1sig, G2sig, Rsig and Bsig.
The picture signal that this image processing equipment separates into picture signal the picture signal being made up of G1sig, the picture signal being made up of G2sig, the picture signal being made up of Rsig and is made up of Bsig, the row interpolation processing of going forward side by side, to make all pixels in the picture signal of each color have signal.
Then, image processing equipment obtain with the G1sig of pixel of object pixel perpendicular abutment of color interpolation or the degree of correlation of the value of G2sig and with the G1sig of pixel of object pixel level adjacency or the degree of correlation of the value of G2sig.If the degree of correlation in horizontal direction is higher than the degree of correlation in vertical direction, image processing equipment is using the value of Rsig-G1sig as color difference signal R-G, and using the value of Bsig-G2sig as color difference signal B-G.On the contrary, if the degree of correlation in vertical direction higher than the degree of correlation in horizontal direction, image processing equipment is using the value of Rsig-G2sig as color difference signal R-G, and using the value of Bsig-G1sig as color difference signal B-G (referring to patent documentation 1).
Alternatively, image processing equipment is by using the corresponding weight coefficient of difference between the value of Rsig-G1sig and the value of Rsig-G2sig, using the mean value of the value of the value of Rsig-G1sig and Rsig-G2sig as color difference signal R-G.Equally, image processing equipment is by using the corresponding weight coefficient of difference between the value of Bsig-G1sig and the value of Bsig-G2sig, using the mean value of the value of the value of Bsig-G1sig and Bsig-G2sig as color difference signal B-G.
By this way, the pixel that will be used for color interpolation by suitable selection generates color difference signal, reduces the processing of false colour.
And, in the time will generating luminance signal, be positioned at the degree of correlation of the pixel in horizontal direction and the vertical direction of object pixel by basis and pixel that suitably selection will be used for interpolation generates picture signal, thereby in the case of suppressing moire fringes (moire) and preventing from processing (referring to patent documentation 3) naturally not feeling in whole image.
reference listing
patent documentation
Patent documentation 1: TOHKEMY 2002-300590
Patent documentation 2: Japanese kokai publication hei 08-023541
Patent documentation 3: TOHKEMY 2007-336384
Summary of the invention
technical problem
But, even in above-mentioned processing, in the region of near the picture signal comprising nyquist frequency or the picture signal that comprises aliasing noise, also fail correctly to obtain the degree of correlation in horizontal direction and vertical direction, thereby may remain false colour or moire fringes.Therefore think and have the leeway of improving of further reducing false colour or moire fringes.
for the scheme of dealing with problems
In order to address the above problem, image processing equipment according to the present invention comprises: interpolation component, for the picture signal obtaining from camera head being separated into the picture signal of each color filter, and carry out interpolation processing by the picture signal that uses each color filter, wherein, in described camera head, configure multiple color filters and be provided with the pixel corresponding with each color filter with preassigned pattern; And decision means, for the difference between slope and described the first color filter and the picture signal of described the second color filter of the picture signal of the first color filter in described multiple color filters in based target region and the second color filter one of at least, judge whether described target area is high-frequency region, wherein, mode identical with the cycle and space phase skew configures the pixel corresponding with described the first color filter and described the second color filter.
the beneficial effect of the invention
According to the present invention, can provide a kind of image processing equipment that can increase the effect that suppresses the false colour that occurs in high-frequency region and moire fringes.
Brief description of the drawings
Fig. 1 is the block diagram illustrating according to the structure of the image processing equipment of first embodiment of the invention.
Fig. 2 is the figure that the subregion being made up of 3 × 3 pixels that form with bayer-pattern in camera head is shown.
Fig. 3 is the block diagram illustrating according to the structure of the color difference signal generative circuit 104 of first embodiment of the invention.
Fig. 4 is the figure of the processing carried out for account for color interpolation circuit 300.
Fig. 5 comprises the figure of the example that digital filter is shown.
Fig. 6 comprises the figure of the example of the frequency characteristic that LPF301～304 and LPF351～353 are shown.
Fig. 7 is the figure that the subject of the vertical stripes with gradual change is shown.
Fig. 8 comprises the figure that the value by taking G1sig in the picture signal that obtains of subject and G2sig is shown.
Fig. 9 is the figure that circular zone plate (CZP) is shown.
Figure 10 comprises the figure of the value of the G1sig that illustrates after the interpolation being positioned at the axle extending from the central horizontal of CZP and G2sig.
Figure 11 is the flow chart that the processing of the selection color difference signal carrying out according to the selection circuit 320 of first embodiment of the invention is shown.
Figure 12 is the block diagram illustrating according to the structure of the color difference signal generative circuit 104 of second embodiment of the invention.
Figure 13 is the flow chart that the processing of the selection color difference signal carrying out according to the selection circuit 320 of second embodiment of the invention is shown.
Figure 14 is the block diagram illustrating according to the structure of the color difference signal generative circuit 104 of third embodiment of the invention.
Figure 15 is the flow chart that the processing of the secondary colour difference signal carrying out according to the combiner circuit 380 of third embodiment of the invention is shown.
Figure 16 is the figure that bayer-pattern is shown.
Embodiment
Describe embodiments of the invention in detail below with reference to accompanying drawing.
the first embodiment
Fig. 1 is the block diagram illustrating according to the structure of the image processing equipment of first embodiment of the invention.
Image unit 101 comprises unshowned pick-up lens, camera head and drive circuit thereof, and the optical imagery that uses camera head that pick-up lens is formed converts the signal of telecommunication to.Camera head comprises charge coupled device (CCD) or complementary metal oxide semiconductors (CMOS) (CMOS) transducer, and comprises the pixel set of the bayer-pattern shown in Figure 16.
Convert the analog signal of exporting from image unit 101 to digital signal by A/D converter 102.White balance (WB) circuit 103 carries out known blank level adjustment to the picture signal that is converted to digital signal by A/D converter 102.
The picture signal of exporting from white balance circuit 103 is inputed to color difference signal generative circuit 104, degree of correlation testing circuit 110 and luminance signal generative circuit 111.Degree of correlation testing circuit 110 detect according to picture signal, taking pixel or region as unit in the vertical direction with horizontal direction on the degree of correlation of signal.The picture signal of utilizing output, luminance signal generative circuit 111 and the brightness gamma circuit 112 of degree of correlation testing circuit 110 to export white balance circuit 103 is carried out luminance signal processing, thereby taking pixel or region as the output brightness signal Y of unit.
Color difference signal generative circuit 104 is according to inputted picture signal, taking pixel or region as unit generates color difference signal R-G and B-G, and exports color difference signal.The color difference signal R-G and the B-G that color difference signal generative circuit 104 are exported by color conversion matrix circuit 105 convert respectively color difference signal R-Y and B-Y to.Afterwards, utilize color to suppress the aberration gain that circuit 106 suppresses high brightness and low-light level.Suppress the output signal of circuit 106 by known color gamma circuit 107 with for adjusting the known colourity flex point circuit 108 of cHroma gain from color, thereby taking pixel or region as the output color difference signal UV of unit.
The brightness interpolating processing of now explanation luminance signal generative circuit 111 being carried out.Fig. 2 illustrates the subregion being made up of 3 × 3 pixels that form with the bayer-pattern shown in Figure 16 in camera head.In this brightness interpolating is processed, do not distinguish from the signal G1sig of the pixel output corresponding with G1 filter and from the signal G2sig of the corresponding pixel output of G2 filter, and these two signals are all processed as Gsig.
First, luminance signal generative circuit 111 by Gsig be interpolated into all pixels corresponding with filter except G filter (G1 filter and G2 filter), with R filter and the corresponding pixel of B filter.For example, the P1～P9 in Fig. 2 is the Reference numeral for identifying pixel, and R, G1, G2 and B represent the color filter corresponding with each pixel P1～P9." P5 (Rsig) " represents the value of the Rsig in pixel P5, and " P5 (Gsig) " represents the value of the Gsig in pixel P5, and " P5 (Bsig) " represents the value of the Bsig in pixel P5.
In the case of Gsig being interpolated into the pixel P5 corresponding with B filter, the degree of correlation of the signal in detection of vertical and horizontal direction is to judge the direction of higher degree of relation., obtain the absolute value of the difference between the absolute value of the difference between the signal of the pixel of the pixel upper and lower sides as interpolation target and the signal in the pixel of the pixel left and right sides as interpolation target.
mathematical expression 1
Hdiff＝|P4(Gsig)-P6(Gsig)|···(1)
Vdiff＝|P2(Gsig)-P8(Gsig)|···(2)
Then, the difference between Hdiff and Vdiff judges signal MatSw as interpolation direction.
mathematical expression 2
MatSw＝Hdiff-Vdiff···(3)
When MatSw is when negative, the degree of correlation in horizontal direction is stronger, thereby carries out interpolation by the picture element signal in usage level direction., the Gsig using the mean value of the Gsig of the Gsig of pixel P4 and pixel P6 as P5.On the other hand, be on duty as timing, by using the picture element signal in vertical direction to carry out interpolation., the Gsig using the mean value of the Gsig of the Gsig of pixel P2 and pixel P8 as P5.In a similar fashion all pixels corresponding with R filter and B filter are carried out the interpolation of Gsig.
Then, carry out the interpolation of Rsig by Gsig pair of all pixels corresponding with G filter and B filter after use interpolation.By using the Rsig of the pixel corresponding with the R filter that is positioned at left and right sides or upper and lower sides and these pixels being carried out Gsig that interpolation obtains the pixel corresponding with G filter (P2, P4, P6 and P8) carried out the interpolation of Rsig.And, by using the Rsig of the pixel corresponding with being positioned at pixel R filter around and these pixels being carried out to the Gsig that interpolation obtains, carry out interpolation according to the following formula pair pixel corresponding with B filter.
mathematical expression 3
P2(Rsig)＝((P1(Rsig)-P1(Gsig))+(P3(Rsig)-P3(Gsig)))/2+P2(Gsig)···(4)
P4(Rsig)＝((P1(Rsig)-P1(Gsig))+(P7(Rsig)-P7(Gsig)))/2+P4(Gsig)···(5)
P5(Rsig)＝((P1(Rsig)-P1(Gsig))+(P3(Rsig)-P3(Gsig))+(P7(Rsig)-P7(Gsig))+(P9(Rsig)-P9(Gsig)))/4+P5(Gsig)···(6)
Equally, can carry out to all pixels corresponding with G filter and R filter the interpolation of Bsig.Therefore, in each pixel, obtain Rsig, Gsig and Bsig.In addition,, by using following formula (7) to calculate, can obtain brightness signal Y in each pixel.
mathematical expression 4
Y＝0.3×Rsig+0.59×Gsig+0.11×Bsig···(7)
Note, can change as required the coefficient in expression formula (7) every.
Then, by the color interpolation processing of carrying out in explanation color difference signal generative circuit 104.Fig. 3 is the block diagram that the structure of color difference signal generative circuit 104 is shown.Color difference signal generative circuit 104 comprises color interpolation circuit 300 and 350, low pass filter (LPF) 301～304 and 351～353, color difference signal counting circuit 311～314, selects circuit 320 and false colour decision circuitry 360.
The picture signal that white balance circuit 103 is exported inputs to color interpolation circuit 300.Fig. 4 is the figure of the interpolation processing of carrying out for account for color interpolation circuit 300.As shown in Figure 4, color interpolation circuit 300 will decompose into the picture signal being made up of the signal corresponding with each color of R, G1, G2 and B filter with the picture signal of bayer-pattern input.Now, signal value 0 is inserted not with decompose after the corresponding pixel of color filter in.
Afterwards, color interpolation circuit 500 uses known digital filter to utilize LPF to carry out interpolation processing, and exports all pixels and all have the picture signal of color R signal, each, G1, G2 and B.
The picture signal of each color of exporting from color interpolation circuit 300 is inputed to LPF301～304 with different cut-off frequencies.Fig. 6 (a) illustrates the example of the frequency characteristic of LPF301～304.LPF301 has the frequency characteristic 601 in Fig. 6 (a), LPF302 has the frequency characteristic 602 in Fig. 6 (a), LPF303 has the frequency characteristic 603 in Fig. 6 (a), and LPF304 has the frequency characteristic 604 in Fig. 6 (a).Be appreciated that from Fig. 6 (a) cut-off frequency increases with the order of LPF301, LPF302, LPF303 and LPF304., image, comprise higher frequency content with the order of the picture signal S03 exporting from the picture signal S01 of LPF301 output, from the picture signal S02 of LPF302 output, from LPF303 and the picture signal S04 exporting from LPF304.Each picture signal S01～S04 has the picture signal of each color R, the G1, G2 and the B that have limited frequency content.
Picture signal S01 is inputed to color difference signal counting circuit 311, picture signal S02 is inputed to color difference signal counting circuit 312, picture signal S03 is inputed to color difference signal counting circuit 313, and picture signal S04 is inputed to color difference signal counting circuit 314.Color difference signal counting circuit 311～314 is by using said method to calculate color difference signal to picture signal S01～S04.
That is, the object pixel that color difference signal counting circuit 311 obtains with reference to degree of correlation testing circuit 110 in the horizontal direction with vertical direction on the degree of correlation, thereby generate color difference signal R-G and B-G.Particularly, if degree of correlation testing circuit 110 is judged as the degree of correlation in horizontal direction higher than the degree of correlation in vertical direction, color difference signal counting circuit 311 is using the value of Rsig-G1sig as color difference signal R-G and using the value of Bsig-G2sig as color difference signal B-G.On the other hand, if degree of correlation testing circuit 110 is judged as the degree of correlation in vertical direction higher than the degree of correlation in horizontal direction, color difference signal counting circuit 311 is using the value of Rsig-G2sig as color difference signal R-G and using the value of Bsig-G1sig as color difference signal B-G.
Alternatively, color difference signal counting circuit 311 is by using the corresponding weight coefficient of difference between the value of Rsig-G1sig and the value of Rsig-G2sig, using the mean value of the value of the value of Rsig-G1sig and Rsig-G2sig as color difference signal R-G.Equally, color difference signal counting circuit 311 is by using the corresponding weight coefficient of difference between the value of Bsig-G1sig and the value of Bsig-G2sig, using the mean value of the value of the value of Bsig-G1sig and Bsig-G2sig as color difference signal B-G.
Also in color difference signal counting circuit 312～314, carry out above-mentioned processing.
The color difference signal R-G that color difference signal counting circuit 311～314 is calculated and B-G input to selection circuit 320 described later as color difference signal S11, S12, S13 and S14.
False colour decision operation then will be described.The view data of exporting from white balance circuit 103 is inputed to color interpolation circuit 350.As color interpolation circuit 300, color interpolation circuit 350 is exported all pixels and all has the picture signal of color R signal, each, G1, G2 and B.
In the bayer-pattern shown in Figure 16, the pixel count corresponding with G filter is the twice of the pixel count corresponding with R filter or the twice with the corresponding pixel count of B filter.By G filter being resolved into G1 filter and G2 filter, the pixel separation (sampling interval) of R, G1, G2 and B filter becomes mutually and equates.Therefore,, by using the picture signal of G1 and G2 to detect the region that aliasing noise occurs, can specify the region that aliasing noise occurs in the picture signal of R and B.
The picture signal of each color of exporting from color interpolation circuit 350 is inputed to LPF351～353 with different cut-off frequencies.Fig. 6 (b) illustrates the example of the frequency characteristic of LPF351～353.LPF351 has the frequency characteristic 611 in Fig. 6 (b), and LPF352 has the frequency characteristic 612 in Fig. 6 (b), and LPF353 has the frequency characteristic 613 in Fig. 6 (b).Be appreciated that from Fig. 6 (b) cut-off frequency increases with the order of LPF351, LPF352 and LPF353., image, comprise higher frequency content with the order of the picture signal T02 exporting from the picture signal T01 of LPF351 output, from LPF352 and the picture signal T03 exporting from LPF353.In the present embodiment, the frequency characteristic of LPF301 is corresponding with the frequency characteristic of LPF351, and the frequency characteristic of LPF302 is corresponding with the frequency characteristic of LPF352, and the frequency characteristic of LPF303 and the frequency characteristic of LPF353 corresponding.
To input to false colour decision circuitry 360 from the picture signal T01～T03 of LPF351～353 output.
The method that the region of pseudo-chrominance signal occurs by 360 judgements of false colour decision circuitry is described referring now to Fig. 7 and 8.Fig. 7 illustrates the subject of the vertical stripes with gradual change.Fig. 8 illustrates G1sig in the picture signal that the image by taking the subject in Fig. 7 obtains and the value of G2sig.
In Fig. 8 (a)～(i), transverse axis represents the position of the pixel in horizontal direction.At Fig. 8 (a), (d) with (g), the G1sig that configuration obtains from the pixel corresponding with G1 filter particular row side by side and from another row the G2sig that obtains of the corresponding pixel of G2 filter.In the horizontal direction with vertical direction on, the sampling interval of the sampling interval of the pixel corresponding with G1 filter and the pixel corresponding with G2 filter equates mutually, and the pixel corresponding with G1 filter and be offset the half in sampling interval with the space phase of the corresponding pixel of G2 filter.
Because the subject in Fig. 7 is vertical stripes, thereby subject image is incident to all row equably.Thus, when according to the position configuration G1sig of the pixel in horizontal direction and G2sig, can obtain the picture signal of the gradual change of the subject shown in presentation graphs 7.Here,, in Fig. 8 (a), the frequency of supposing the vertical stripes shown in Fig. 7 is fully lower than the nyquist frequency of G1 filter and G2 filter.In Fig. 8 (d), the frequency of supposing the vertical stripes shown in Fig. 7 is higher than the frequency of the vertical stripes shown in Fig. 8 (a) and slightly lower than the nyquist frequency of G1 filter and G2 filter.In Fig. 8 (g), suppose that the frequency of the vertical stripes shown in Fig. 7 is higher than the nyquist frequency of G1 filter and G2 filter.
At Fig. 8 (b), (e) with (h), only extract Fig. 8 (a), (d) and (g) in G1sig, and by using G1sig around not corresponding with G1 filter pixel to be carried out to the interpolation of G1sig.At Fig. 8 (c), (f) with (i), only extract Fig. 8 (a), (d) and (g) in G2sig, and by using G2sig around not corresponding with G2 filter pixel to be carried out to the interpolation of G2sig.
Be appreciated that from Fig. 8 (a)～(i) G1sig after interpolation and the phase deviation of G2sig are little when the spatial frequency of subject is during fully lower than the nyquist frequency of G1 filter and G2 filter.Along with the spatial frequency of subject more approaches the nyquist frequency of G1 filter and G2 filter, the G1sig after interpolation and the phase deviation of G2sig are large.In the time that spatial frequency exceedes nyquist frequency, the G1sig after interpolation and the phase place of G2sig are substantially contrary.That is whether, can come judging area by the phase difference of the G1sig after detection interpolation and G2sig is high-frequency region, and whether region is the region that false colour occurs.
The operation of false colour decision circuitry 360 is described referring now to Fig. 9 and Figure 10.
Fig. 9 is the figure that circular zone plate (CZP) is shown, wherein, configures many concentric circless using picture centre as initial point, and spatial frequency therefrom increases in mind-set outside.Figure 10 illustrates G1sig after the drawn interpolation being positioned at the axle extending from the central horizontal of CZP and the value of G2sig.
In Figure 10 (a), the G1sig after the interpolation of curve 1001 presentation video signal T01, and G2sig after the interpolation of curve 1002 presentation video signal T01.In Figure 10 (b), the G1sig after the interpolation of curve 1003 presentation video signal T02, and G2sig after the interpolation of curve 1004 presentation video signal T02.In Figure 10 (c), the G1sig after the interpolation of curve 1005 presentation video signal T03, and G2sig after the interpolation of curve 1006 presentation video signal T03.F0～F4 represents the spatial frequency of CZP.The spatial frequency at picture centre place is represented by F0, and spatial frequency increases to the outside of image gradually with the order of F1, F2, F3 and F4.
Whether the difference of the characteristic between the picture signal of the G2sig of false colour decision circuitry 360 after by picture signal and the interpolation of the G1sig with after interpolation is come judging area is the high-frequency region that pseudo-chrominance signal occurs.Particularly, the phase place of the slope of the picture signal of the G2sig after picture signal and the interpolation of the G1sig after concern interpolation, and in the time meeting following formula (8), be the false colour region that pseudo-chrominance signal occurs by region decision.
mathematical expression 5
Δ G1h × Δ G2h<0 or Δ G1v × Δ G2v<0 (8)
Here the picture signal that Δ G1h represents the G1sig after interpolation slope in the horizontal direction, and the Δ G2h slope in the horizontal direction of picture signal that represents the G2sig after interpolation.And, the picture signal that Δ G1v represents the G1sig after interpolation slope in vertical direction, and the Δ G2v slope in vertical direction of picture signal that represents the G2sig after interpolation.For example, can obtain the slope in horizontal direction by the known digital filter shown in use Fig. 5 (a), and by using the known digital filter shown in Fig. 5 (b) to obtain the slope in vertical direction.Be not limited to this for the filter that obtains slope.
Alternatively, can be taking the target area of the multiple pixels of each freedom composition as unit, and do not judge false colour region taking pixel as unit.Taking target area as unit judges in the situation that, if by using in the slope of the picture signal that each pixel that this region comprises obtains, the percentage that meets the slope of the picture signal of expression formula (8) is equal to or higher than threshold value, can be false colour region by this region decision.Below, the region that " target area " can be made up of multiple pixels or the region being formed by single pixel.
In the present embodiment, can judge from Figure 10 (a), in picture signal T01, the spatial frequency in Fig. 9 is higher than the region 2～4th of F1, false colour region.And, can judge from Figure 10 (b), in picture signal T02, the spatial frequency in Fig. 9 is false colour regions higher than the region 3 and 4 of F2.In addition, can judge from Figure 10 (c), in picture signal T03, the spatial frequency in Fig. 9 is false colour regions higher than the region 4 of F3.
Select circuit 320 for being judged as the region 1 that is not false colour region in picture signal T01, select from thering is with picture signal T01 the color difference signal S11 that the picture signal of same frequency generates.And, select circuit 320 in false colour region and picture signal T02, to be judged as for being judged as in picture signal T01 the region 2 that is not false colour region, select from thering is with picture signal T02 the color difference signal S12 that the picture signal of same frequency generates.And, select circuit 320 in false colour region and picture signal T03, to be judged as for being judged as in picture signal T02 the region 3 that is not false colour region, select from thering is with picture signal T03 the color difference signal S13 that the picture signal of same frequency generates.And, select circuit 320 for the region 4 that is judged as false colour region in picture signal T03, select the color difference signal S14 generating lower than the picture signal of the frequency of picture signal T03 from having.By this way, select circuit 320 can not comprise taking pixel as contractor selection the color difference signal of false colour.
In the present embodiment, suppose that the frequency characteristic of LPF301 and the frequency characteristic of LPF351 are corresponding, the frequency characteristic of LPF302 is corresponding with the frequency characteristic of LPF352, and the frequency characteristic of LPF303 and the frequency characteristic of LPF353 corresponding, but the invention is not restricted to this.
For example, in order to increase and be judged as the probability that false colour does not occur in the region that is not false colour region in picture signal T01 in picture signal S01, the upper limit of the frequency that picture signal S01 can be comprised is decreased to below the upper limit of the frequency that picture signal T01 comprises., the cut-off frequency of LPF351 is set to be slightly higher than the cut-off frequency of LPF301.Equally, the cut-off frequency of LPF352 is set to the cut-off frequency higher than LPF302, and the cut-off frequency of LPF353 is set to be slightly higher than the cut-off frequency of LPF303.But, in this case, with the frequency characteristic of LPF301 corresponding to the frequency characteristic of the frequency characteristic of LPF351, LPF302 corresponding to the frequency characteristic of LPF352 and the frequency characteristic of LPF303 corresponding to compared with the situation of the frequency characteristic of LPF353, may increase the region with the color resolution reducing.
On the contrary, in the time will reducing the region with the color resolution reducing, can LPF301, LPF302 and the cut-off frequency of LPF303 be set to the cut-off frequency lower than corresponding LPF351, LPF352 and LPF353 slightly.But, in this case, in picture signal S01, may comprise the frequency higher than the frequency of picture signal T01.Thus, probably not that by being judged as in picture signal T01 the region decision in false colour region is the false colour region in picture signal S01.
Can come whether appropriate change makes the cut-off frequency of LPF301～303 and the cut-off frequency of LPF351～353 is corresponding or it is poor whether between them, to arrange according to the image that will generate.Alternatively, change according to the pattern of subject because reduce the effect of resolution, so can be according to the cut-off frequency of these LPF of subject appropriate change.
As mentioned above, according to the present embodiment, color difference signal generative circuit 104 generates multiple picture signal S01～S04 of LPF301～304 by having different cut-off frequencies, and hierarchically generates color difference signal S11～S14 according to multiple picture signal S01～S04.Then, color difference signal generative circuit 104 generates multiple picture signal T01～T03 of LPF351～353 by having different cut-off frequencies, and detects false colour region taking the picture signal of different layers as unit.Select circuit 320 to detect that according to the picture signal of which resolution from picture signal T01～T03 false colour region selects any in color difference signal S11～S14.Thus, select circuit 320 can be with pixel or region for unit, select the color difference signal that picture signal was generated in the layer of highest frequency the scope from preventing false colour.
By this way, color resolution is reduced to necessary amount only to suppress false colour in the region that false colour occurs, and in the region that false colour does not occur, eliminate and reduce the necessity of color resolution, thereby can realize the well balanced of the increase of color resolution and the inhibition of false colour.
Figure 11 is the flow chart that the processing of selecting the selection color difference signal that carries out of circuit 320 is shown.Select circuit 320 taking pixel or region as processing is selected by unit.Here, suppose and select circuit 320 to select taking pixel as unit to process.
In step S1101, select the pixel of the circuit 320 judgements picture signal T01 corresponding with object pixel whether to be judged as false colour region by false colour decision circuitry 360.Not false colour region if object pixel is judged as, select circuit 320 to enter step S1104, in step S1104, select circuit 320 to select the color difference signal S11 of the pixel corresponding with object pixel as the color difference signal of object pixel.
If object pixel is judged as being false colour region in step S1101, select circuit 320 to enter step S1102.In step S1102, select the pixel of the circuit 320 judgements picture signal T02 corresponding with object pixel whether to be judged as false colour region by false colour decision circuitry 360.Not false colour region if object pixel is judged as, select circuit 320 to enter step S1105, in step S1105, select circuit 320 to select the color difference signal S12 of the pixel corresponding with object pixel as the color difference signal of object pixel.
If object pixel is judged as being false colour region in step S1102, select circuit 320 to enter step S1103.In step S1103, select the pixel of the circuit 320 judgements picture signal T03 corresponding with object pixel whether to be judged as false colour region by false colour decision circuitry 360.Not false colour region if object pixel is judged as, select circuit 320 to enter step S1106, in step S1106, select circuit 320 to select the color difference signal S13 of the pixel corresponding with object pixel as the color difference signal of object pixel.
If object pixel is judged as being false colour region in step S1103, select circuit 320 to enter step S1107, in step S1107, select circuit 320 to select the color difference signal S14 of the pixel corresponding with object pixel as the color difference signal of object pixel.
Then, select circuit 320 to carry out color difference signal to all pixels of the picture signal that will export and select to process, and output needle is to the color difference signal R-G and the B-G that comprise in any in the selected color difference signal S11～S14 of each pixel.Then the color difference signal R-G, exporting and B-G are input to color conversion matrix circuit 105 and are converted into signal R-Y and B-Y.
In the present embodiment, whether be false colour region, but the invention is not restricted to this if using expression formula (8) to come judging area.For example, can pay close attention to the value of Δ G1h, Δ G1v, Δ G2h and Δ G2v, and if meet any in following formula (9)～(12), can be false colour region by region decision.And the threshold value TH in these expression formulas can be mutually different in picture signal T01～T03.Utilize the adjustment of these values, can change the benchmark for judging false colour region, and can adjust the balance between the increase of color resolution and the inhibition of false colour.
mathematical expression 6
Δ G1h-TH>0 and Δ G2h+TH<0 (9)
Δ G1h+TH<0 and Δ G2h-TH>0 (10)
Δ G1v-TH>0 and Δ G2v+TH<0 (11)
Δ G1v+TH<0 and Δ G2v-TH>0 (12)
(wherein, TH>0)
Whether the slope in concern horizontal direction and the slope in vertical direction are false colour regions with judging area.Alternatively, can pay close attention to the slope on incline direction.
And whether come judging area with the slope of the picture signal of the G2sig after slope and the interpolation of the picture signal of the G1sig after interpolation is false colour region.Alternatively, can use the difference between G1sig and G2sig.,, if the difference between G1sig and G2sig is large, phase deviation can be judged as large.Particularly, even if do not meet any in expression formula (8)～(12), if as shown in expression formula (13), the absolute value of the G1sig in object pixel and the difference of G2sig exceedes threshold value, also object pixel can be judged as to false colour region.
mathematical expression 7
|G1sig-G2sig|>0···(13)
But if luminance signal is little, the value of G1sig and G2sig is all little.The luminance signal of the corresponding pixel that can generate according to luminance signal generative circuit 111 thus, changes these threshold values.
Alternatively, the judgement of the slope of the picture signal of the G2sig after slope and the interpolation of the picture signal of the G1sig based on after interpolation, the judgement that can also combine the difference of the value based between G1sig and G2sig.
In addition, these Rule of judgment can change between picture signal T01～T03.
In addition,, except object pixel, can also judge whether object pixel is false colour region by the judged result in the false colour region of consideration object pixel pixel around.
In the present embodiment, generate color difference signal according to four layer image signals, and in three layer image signals, carry out the judgement in false colour region, but the number of plies is not limited to this.Can generate color difference signal from the picture signal of the different frequency of N+1 layer, and can in the picture signal of the different frequency of N layer, carry out the judgement in false colour region.
In the present embodiment, color interpolation circuit 300 and color interpolation circuit 350 are separated from each other, if but they have common characteristic, can use a common circuit.Equally, can in the situation that having denominator, LPF301～303 and LPF351～353 use a common circuit as LPF301～303 and LPF351～353.
In the present embodiment, illustrated that any from the color difference signal of the picture signal generation of the different frequency of multiple layers of selection is to suppress example of false colour, but the invention is not restricted to this.In method same as described above, can generate luminance signal from the picture signal of the different frequency of N+1 layer, and can detect moire fringes region with identical method for the picture signal of the different frequency of N layer, and do not detect false colour region, thereby can suppress the moire fringes causing due to luminance signal.The false colour that, the present embodiment causes for the moire fringes causing due to brightness with due to color signal is effective.In addition,, if the picture signal of having carried out the size adjustment processing for reducing pixel count is carried out to the processing according to the present embodiment, can suppress size adjustment and process caused moire fringes or false colour.
As mentioned above, the picture signal obtaining from the camera head of bayer-pattern according to the image processing equipment of the present embodiment, extract as the picture signal of the G1 filter of the first color filter with as the picture signal of the G2 filter of the second color filter, the row interpolation of going forward side by side.With the identical cycle configuration pixel corresponding with G1 filter and G2 filter, and the space phase of the pixel corresponding with G1 filter and G2 filter is offset.Thus, as shown in Fig. 8 and 10, the phase place of the picture signal of the G2 filter after picture signal and the interpolation of the G1 filter after interpolation that reverses in high-frequency region.At least one in difference between slope and G1 filter and the picture signal of G2 filter of the picture signal that thus, image processing equipment can be based on G1 filter and G2 filter judges whether target area (object pixel) is high-frequency region.High-frequency region if be judged as target area, image processing equipment generates the prearranged signals such as color difference signal and luminance signal etc. according to following picture signal, thereby can suppress false colour and moire fringes, wherein, in this picture signal, cut-off frequency is reduced to object pixel and is not judged as the grade of high-frequency region.
Alternatively, image processing equipment can make the equipment of after-stage generate the prearranged signals such as color difference signal and luminance signal etc., and can in picture signal, arrange whether expression object pixel is the mark of the judged result of high-frequency region.
the second embodiment
The difference of the second embodiment and the first embodiment is also to judge whether object pixel is fringe region in the time selecting circuit 320 to select color difference signal.In the first embodiment, be false colour region if false colour decision circuitry 360 is judged as target area, select circuit 320 to select the color difference signal generating from the picture signal of lower frequency.As a result, be fringe region if be judged as the region in false colour region, the color in fringe region may seem to ooze out.
According to the structure of the image processing equipment of the present embodiment, with identical according to the structure of the image processing equipment of the first embodiment, and the description thereof will be omitted thus.In the present embodiment, a part for the structure of the color difference signal generative circuit 104 shown in Fig. 1 is different from the first embodiment.
Figure 12 is the block diagram illustrating according to the structure of the color difference signal generative circuit 104 of the present embodiment.Except the structure of the color difference signal generative circuit shown in Fig. 3, also comprise the edge decision circuitry 370 receiving from the picture signal T01～T03 of LPF351～353 output according to the color difference signal generative circuit 104 of the present embodiment.The judged result relevant with fringe region that generate edge decision circuitry 370 inputed to and select circuit 320.
Edge decision circuitry 370 is by being used expression formula (14), the picture signal of G1 and the picture signal of G2 based on comprising from the picture signal T01 of LPF351 output to calculate the Gsig in all pixels.
mathematical expression 8
Gsig＝(G1sig+G2sig)/2···(14)
Then, pay close attention to Gsig picture signal in the horizontal direction with vertical direction on slope.If meet following formula (15), object pixel is judged as to fringe region, and judged result is exported to and selects circuit 320.
mathematical expression 9
Δ Gh>TH or Δ Gv>TH (15)
Here the picture signal that Δ Gh represents the Gsig after interpolation slope in the horizontal direction, and the Δ Gv slope in the horizontal direction of picture signal that represents the G2sig after interpolation.Can obtain these slopes by the known digital filter shown in Fig. 5 (b) by the known digital filter shown in Fig. 5 (a) and in vertical direction.Be not limited to this for the filter that obtains slope.Alternatively, can be taking the region that formed by multiple pixels as unit, and do not judge fringe region taking pixel as unit.Taking region as unit judges in the situation that, if by using in the slope of the picture signal that each pixel that this region comprises obtains, the percentage that meets the slope of the picture signal of expression formula (15) is equal to or higher than threshold value, can be fringe region by this region decision.
Equally, edge decision circuitry 370 is carried out the judgement of fringe region to the picture signal T02 from LPF352 output with from the picture signal T03 of LPF353 output.
Having illustrated based on G1sig and G2sig uses the example of Gsig as the method for judging fringe region.Alternatively, can also use the luminance signal by using expression formula (7) to generate from Rsig, Gsig and Bsig.
False colour decision circuitry 360 is carried out the judgement in the false colour region in the processing identical with the first embodiment, and judged result is exported to and selects circuit 320.
Figure 13 is the flow chart that the processing of the selection color difference signal carrying out according to the selection circuit 320 of the present embodiment is shown.Select circuit 320 taking pixel or region as processing is selected by unit.Here, suppose and select circuit 320 to select taking pixel as unit to process.
In step S1301, select the pixel of the circuit 320 judgements picture signal T01 corresponding with object pixel whether be judged as false colour region by false colour decision circuitry 360 and be judged as and be not fringe region by edge decision circuitry 370.If pixel is judged as and is not false colour region by false colour decision circuitry 360, select circuit 320 to enter step S1304 to select the color difference signal S11 of the pixel corresponding with this object pixel as the color difference signal of object pixel.And, if pixel is judged as fringe region by edge decision circuitry 370, select circuit 320 to enter step S1304 to select the color difference signal S11 of the pixel corresponding with this object pixel as the color difference signal of object pixel.,, even if object pixel is judged as false colour region, in the situation that object pixel is judged as fringe region, select circuit 320 also to select color difference signal S11 preferentially to suppress oozing out of color in fringe region.
If pixel is judged as false colour region by false colour decision circuitry 360 and is judged as and is not fringe region by edge decision circuitry 370, select circuit 320 to enter step S1302.In step S1302, select the pixel of the circuit 320 judgements picture signal T02 corresponding with object pixel whether be judged as false colour region by false colour decision circuitry 360 and be judged as and be not fringe region by edge decision circuitry 370.If pixel is judged as and is not false colour region by false colour decision circuitry 360, select circuit 320 to enter step S1305 to select the color difference signal S12 of the pixel corresponding with this object pixel as the color difference signal of object pixel.And, if pixel is judged as fringe region by edge decision circuitry 370, select circuit 320 to enter step S1305 to select the color difference signal S12 of the pixel corresponding with this object pixel as the color difference signal of object pixel.,, even if object pixel is judged as false colour region, in the situation that object pixel is judged as fringe region, select circuit 320 also to select color difference signal S12 preferentially to suppress oozing out of color in fringe region.
If pixel is judged as false colour region by false colour decision circuitry 360 and is judged as and is not fringe region by edge decision circuitry 370, select circuit 320 to enter step S1303.In step S1303, select the pixel of the circuit 320 judgements picture signal T03 corresponding with object pixel whether be judged as false colour region by false colour decision circuitry 360 and be judged as and be not fringe region by edge decision circuitry 370.If pixel is judged as and is not false colour region by false colour decision circuitry 360, select circuit 320 to enter step S1306 to select the color difference signal S13 of the pixel corresponding with this object pixel as the color difference signal of object pixel.And, if pixel is judged as fringe region by edge decision circuitry 370, select circuit 320 to enter step S1306 to select the color difference signal S13 of the pixel corresponding with this object pixel as the color difference signal of object pixel.,, even if object pixel is judged as false colour region, in the situation that object pixel is judged as fringe region, select circuit 320 also to select color difference signal S13 preferentially to suppress oozing out of color in fringe region.
On the contrary, if pixel is judged as false colour region by false colour decision circuitry 360 and is judged as and is not fringe region by edge decision circuitry 370, select circuit 320 to enter step S1307 to select color difference signal S14.
As mentioned above, in the present embodiment, even if region is judged as false colour region by false colour decision circuitry 360, in the situation that region is fringe region, the color difference signal of selecting circuit 320 also to select the picture signal in the layer of the frequency high according to the frequency of situation that than region is not fringe region to generate.
By this way, the effect obtaining according in the structure of the first embodiment can be obtained, and oozing out of color in fringe region can be suppressed.
the 3rd embodiment
The difference of the 3rd embodiment and the first embodiment is that color difference signal generative circuit 104 is not any in output color difference signal S11～S14, but the color difference signal that output generates by synthetic these color difference signals S11～S14.
According to the structure of the image processing equipment of the present embodiment, with identical according to the structure of the image processing equipment of the first embodiment, and the description thereof will be omitted thus.In the present embodiment, a part for the structure of the color difference signal generative circuit 104 shown in Fig. 1 is different from the first embodiment.
Figure 14 is the block diagram illustrating according to the structure of the color difference signal generative circuit 104 of the present embodiment.Comprise that according to the color difference signal generative circuit 104 of the present embodiment combiner circuit 380 replaces the selection circuit 320 shown in Fig. 3.
Figure 15 is the flow chart that the processing of the secondary colour difference signal carrying out according to the combiner circuit 380 of the present embodiment is shown.Combiner circuit 380 is taking pixel or region as unit selects to process.Here, suppose combiner circuit 380 select taking pixel as unit process.Combiner circuit 380 detects that according in which picture signal in picture signal T01～T03 false colour region changes the weight of color difference signal S11～S14, secondary colour difference signal S11～S14, and export the signal generating.
In step S1501, combiner circuit 380 judges whether the pixel of the picture signal T01 corresponding with object pixel is judged as false colour region by false colour decision circuitry 360.If pixel is judged as and is not false colour region by false colour decision circuitry 360, combiner circuit 380 enters step S1504 and is set to the weight limit with respect to the weight of other color difference signal with the weight of the color difference signal S11 of the pixel corresponding with object pixel.
If pixel is judged as false colour region by false colour decision circuitry 360 in step S1501, combiner circuit 380 enters step S1502.In step S1502, combiner circuit 380 judges whether the pixel of the picture signal T02 corresponding with object pixel is judged as false colour region by false colour decision circuitry 360.If pixel is judged as and is not false colour region by false colour decision circuitry 360, combiner circuit 380 enters step S1505 and is set to the weight limit with respect to the weight of other color difference signal with the weight of the color difference signal S12 of the pixel corresponding with object pixel.
If pixel is judged as false colour region by false colour decision circuitry 360 in step S1502, combiner circuit 380 enters step S1503.In step S1503, combiner circuit 380 judges whether the pixel of the picture signal T03 corresponding with object pixel is judged as false colour region by false colour decision circuitry 360.If pixel is judged as and is not false colour region by false colour decision circuitry 360, combiner circuit 380 enters step S1506 and is set to the weight limit with respect to the weight of other color difference signal with the weight of the color difference signal S13 of the pixel corresponding with object pixel.
On the contrary, if pixel is judged as false colour region by false colour decision circuitry 360, combiner circuit 380 enters step S1507 and is set to the weight limit with respect to the weight of other color difference signal with the weight of the color difference signal S14 of the pixel corresponding with object pixel.
Combiner circuit 380 is according to the weight arranging in step S1504～S1507, by carrying out secondary colour difference signal S11～S14 by following expression formula arbitrarily.
mathematical expression 10
(R-G,B-G)＝(6×S11+2×S12+S13+S14)/10···(16)
(R-G,B-G)＝(2×S11+5×S12+2×S13+S14)/10···(17)
(R-G,B-G)＝(S11+2×S12+5×S13+2×S14)/10···(18)
(R-G,B-G)＝(S11+S12+2×S13+6×S14)/10···(19)
If the weight of color difference signal S11 is set to maximum, combiner circuit 380 is selected expression formula (16).Equally, if the weight of color difference signal S12, S13 and S14 is set to maximum, combiner circuit 380 is selected respectively expression formula (17), expression formula (18) and expression formula (19).Then, combiner circuit 380 will export color conversion matrix circuit 105 to by this synthetic color difference signal R-G and B-G of obtaining of processing.
As in a second embodiment, can consider whether object pixel is fringe region.; even if object pixel is judged as false colour region; in the situation that object pixel is judged as fringe region, the weight also can from be judged as the picture signal of fringe region with the color difference signal that the picture signal of higher cutoff frequency generates is set to maximum.
In addition, combiner circuit 380 can change according to the pseudo-colourity detecting from picture signal T01～T03 the weight of color difference signal S11～S14.Difference between Δ G1h, Δ G1v, Δ G2h and Δ G2v and G1sig and the value of G2sig that can obtain according to the G2sig after G1sig and interpolation from interpolation obtains pseudo-colourity.That is, combiner circuit 380 arranges pseudo-colourity, more approaches 180 degree so that the phase deviation of the G2sig after G1sig and the interpolation after interpolation is estimated as, and the value of pseudo-colourity is larger.And combiner circuit 380 can arrange according to the pseudo-colourity of picture signal T01～T03 the weight of color difference signal S11～S14.
other embodiment
Also realize by the following method object of the present invention., the storage medium (or recording medium) of the software program code of storing the function for realizing above-described embodiment is supplied to system or equipment.Then, the computer of system or equipment (or CPU or MPU etc.) reads and carries out the program code of storing in storage medium.In this case, the program code reading from storage medium itself is realized the function of above-described embodiment, and program code stored storage medium forms the present invention.And, except realizing the situation of function of above-described embodiment in the time that computer is carried out the program code reading, below situation be also included within the present invention., part or all of actual treatment is carried out in the instruction of the operating system (OS) of moving in computer based on program code, and realizes the function of above-described embodiment by processing.
In addition situation, comprises in the present invention., the program code reading from storage medium is write on the memory arranging in the function expansion card inserting computer or the functional expansion unit that is connected to computer.Then, part or all of actual treatment is carried out in the instruction based on program code such as the CPU arranging in function expansion card or functional expansion unit, and realizes the function of above-described embodiment by processing.
In the situation that the present invention is applied to above-mentioned storage medium, the program code corresponding with said process is stored in storage medium.
reference numerals list
101 image units
102 A/D converters
103 white balances (WB) circuit
104 color difference signal generative circuits
105 color conversion matrix circuit
106 colors suppress circuit
107 color gamma circuit
108 colourity flex point circuit
110 degree of correlation testing circuits
111 luminance signal generative circuits
112 brightness gamma circuit
300,350 color interpolation circuit
301,302,303,304,351,352,353 low pass filters (LPF)
311,312,313,314 color difference signal counting circuits
320 select circuit
360 false colour decision circuitry
370 edge decision circuitry
380 combiner circuits
Claims (12)
1. an image processing equipment, comprising:
Extract parts, extract multiple picture signals with different cut-off frequencies for the picture signal from input;
Decision means, judges at least one of multiple picture signals of extracting for described extraction parts whether target area is high-frequency region; And
Processing unit, the in the situation that of being high-frequency region, exports in described target area compared with being judged as the situation that described target area is high-frequency region, has a picture signal of higher frequency content for not being judged as described target area in described decision means.
2. image processing equipment according to claim 1, is characterized in that,
Described processing unit output is not judged as the picture signal with highest frequency component in the picture signal that described target area is high-frequency region.
3. image processing equipment according to claim 1, is characterized in that, also comprises:
Detection part, for judging whether described target area is fringe region,
Wherein, described processing unit output is judged as the picture signal with highest frequency component in the picture signal that described target area is fringe region.
4. image processing equipment according to claim 1, is characterized in that,
The picture signal of described input obtains from camera head,
Wherein, in described camera head, configured multiple color filters and be provided with the pixel corresponding with each color filter with preassigned pattern.
5. image processing equipment according to claim 4, is characterized in that,
Described camera head comprises red filter, blue electric-wave filter and the green filter with bayer-pattern configuration,
Described decision means is used the picture signal of the pixel corresponding with the first green filter and judges with the picture signal of the corresponding pixel of the second green filter whether described target area is high-frequency region, wherein, described the first green filter is configured in the horizontal direction of described red filter and is configured in the vertical direction of described blue electric-wave filter, and described the second green filter is configured in the vertical direction of described red filter and is configured in the horizontal direction of described blue electric-wave filter.
6. an image processing equipment, comprising:
Extract parts, extract multiple picture signals with different cut-off frequencies for the picture signal from input;
Decision means, judges at least one of multiple picture signals of extracting for described extraction parts whether target area is high-frequency region; And
Processing unit, the in the situation that of being high-frequency region for not being judged as described target area in described decision means, increase compared with being judged as the situation that described target area is high-frequency region, there is the weight of the picture signal of higher frequency content, and synthesize described multiple picture signals to export the synthetic signal obtaining in described target area.
7. image processing equipment according to claim 6, is characterized in that,
Described processing unit is set to be greater than the weight of other picture signal by not being judged as the weight of the picture signal with highest frequency component in the picture signal that described target area is high-frequency region, carry out described synthetic.
8. image processing equipment according to claim 6, is characterized in that, also comprises:
Detection part, for judging whether described target area is fringe region,
Wherein, described processing unit is set to be greater than the weight of other picture signal by being judged as the weight of the picture signal with highest frequency component in the picture signal that described target area is fringe region, carries out described synthetic.
9. image processing equipment according to claim 6, is characterized in that,
The picture signal of described input obtains from camera head,
Wherein, in described camera head, configured multiple color filters and be provided with the pixel corresponding with each color filter with preassigned pattern.
10. image processing equipment according to claim 6, is characterized in that,
Described camera head comprises red filter, blue electric-wave filter and the green filter with bayer-pattern configuration,
Described decision means uses the picture signal obtaining from the first green filter and the picture signal obtaining from the second green filter to judge whether described target area is high-frequency region, wherein, described the first green filter is configured in the horizontal direction of described red filter and is configured in the vertical direction of described blue electric-wave filter, and described the second green filter is configured in the vertical direction of described red filter and is configured in the horizontal direction of described blue electric-wave filter.
11. 1 kinds of image processing methods, comprising:
Extraction step, extracts multiple picture signals with different cut-off frequencies for the picture signal from input;
Determining step, judges at least one of multiple picture signals of extracting for described extraction step whether target area is high-frequency region; And
Treatment step, the in the situation that of being high-frequency region, exports in described target area compared with being judged as the situation that described target area is high-frequency region, has a picture signal of higher frequency content for not being judged as described target area at described determining step.
12. 1 kinds of image processing methods, comprising:
Extraction step, extracts multiple picture signals with different cut-off frequencies for the picture signal from input;
Determining step, judges at least one of multiple picture signals of extracting for described extraction step whether target area is high-frequency region; And
Treatment step, the in the situation that of being high-frequency region for not being judged as described target area at described determining step, increase compared with being judged as the situation that described target area is high-frequency region, there is the weight of the picture signal of higher frequency content, and synthesize described multiple picture signals to export the synthetic signal obtaining in described target area.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106507066A (en) * | 2016-11-22 | 2017-03-15 | 深圳艾科创新微电子有限公司 | Suppress method, the device of false color of image |
| CN107493407A (en) * | 2016-06-08 | 2017-12-19 | 深圳富泰宏精密工业有限公司 | Camera arrangement and photographic method |
| CN107786858A (en) * | 2016-08-25 | 2018-03-09 | 北京展讯高科通信技术有限公司 | A kind of method, apparatus and electronic equipment for suppressing false colour based on spatial frequency |
| CN108615227A (en) * | 2018-05-08 | 2018-10-02 | 浙江大华技术股份有限公司 | A kind of suppressing method and equipment of image moire fringes |
| CN108769523A (en) * | 2018-06-07 | 2018-11-06 | Oppo广东移动通信有限公司 | Image processing method and device, electronic equipment, computer readable storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1610412A (en) * | 2003-10-23 | 2005-04-27 | 索尼株式会社 | Image processing apparatus and image processing method and program |
| CN1957618A (en) * | 2004-05-26 | 2007-05-02 | 安奇逻辑股份有限公司 | Imaging device |
| JP2008072377A (en) * | 2006-09-13 | 2008-03-27 | Canon Inc | Luminance signal creating device, luminance signal creating method and image pickup device |
| US20090251569A1 (en) * | 2008-04-07 | 2009-10-08 | Hitachi, Ltd. | Imaging apparatus |
| WO2011045849A1 (en) * | 2009-10-13 | 2011-04-21 | キヤノン株式会社 | Imaging device |
-
2009
- 2009-10-13 CN CN201410201465.3A patent/CN104010174B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1610412A (en) * | 2003-10-23 | 2005-04-27 | 索尼株式会社 | Image processing apparatus and image processing method and program |
| CN1957618A (en) * | 2004-05-26 | 2007-05-02 | 安奇逻辑股份有限公司 | Imaging device |
| JP2008072377A (en) * | 2006-09-13 | 2008-03-27 | Canon Inc | Luminance signal creating device, luminance signal creating method and image pickup device |
| US20090251569A1 (en) * | 2008-04-07 | 2009-10-08 | Hitachi, Ltd. | Imaging apparatus |
| WO2011045849A1 (en) * | 2009-10-13 | 2011-04-21 | キヤノン株式会社 | Imaging device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107493407A (en) * | 2016-06-08 | 2017-12-19 | 深圳富泰宏精密工业有限公司 | Camera arrangement and photographic method |
| CN107786858A (en) * | 2016-08-25 | 2018-03-09 | 北京展讯高科通信技术有限公司 | A kind of method, apparatus and electronic equipment for suppressing false colour based on spatial frequency |
| CN107786858B (en) * | 2016-08-25 | 2019-07-26 | 北京展讯高科通信技术有限公司 | A kind of method, apparatus and electronic equipment inhibiting false colour based on spatial frequency |
| CN106507066A (en) * | 2016-11-22 | 2017-03-15 | 深圳艾科创新微电子有限公司 | Suppress method, the device of false color of image |
| CN108615227A (en) * | 2018-05-08 | 2018-10-02 | 浙江大华技术股份有限公司 | A kind of suppressing method and equipment of image moire fringes |
| CN108615227B (en) * | 2018-05-08 | 2021-02-26 | 浙江大华技术股份有限公司 | Image moire inhibition method and device |
| CN108769523A (en) * | 2018-06-07 | 2018-11-06 | Oppo广东移动通信有限公司 | Image processing method and device, electronic equipment, computer readable storage medium |
| CN108769523B (en) * | 2018-06-07 | 2020-06-30 | Oppo广东移动通信有限公司 | Image processing method and device, electronic equipment and computer readable storage medium |
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|---|---|
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