CN104916256A - Splicing bright-dark line correction method - Google Patents
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Abstract
The invention relates to a splicing bright-dark line correction method which is applicable to splicing type display screens such as an LED screen. The splicing bright-dark line correction method comprises the steps of determining the size of each display bright block and the size of each display dark block according to the size of splicing units, then controlling and lightening the display screen so as to be provided for shooting to acquire a target image; carrying out image processing on the target image so as to acquire the gray scale center of each of the plurality of bright blocks, and then calculating the display unit spacing and the splicing gap spacing; and finally, calculating a correction coefficient of each marginal display unit, which is adjacent to a splicing gap, of the splicing units by using the display unit spacing and the splicing gap spacing so as to be used for correcting a bright-dark line caused by the splicing gap. According to the invention, people can carry out correction on the bright-dark line accurately by only shooting one image through designing the display unit lightening mode; and furthermore, a problem that the display body uniformity get poor because bright-dark line correction in the prior art is carried out through full-screen analysis can also be avoided.
Description
Technical field
The present invention relates to display control technology field, particularly one splices bright concealed wire modification method.
Background technology
LED display is normally spliced by multiple concatenation unit, owing to there is the restriction such as machining accuracy and splicing accuracy in splicing, stitching portion between concatenation unit and concatenation unit is uneven, causes edge, stitching portion inconsistent with color LED dot spacing.When showing image, there will be stowing when this spacing is greater than lamp point normal pitch, there will be bright seam when spacing is less than lamp point normal pitch, this bright seam or stowing are called that LED display splices bright concealed wire, are called for short the bright concealed wire of splicing.
Bright concealed wire such as the splicing caused by machining etc., is difficult to be solved by improving machining accuracy.Classic method splices the position of bright concealed wire by eye-observation, manually correction factor/correction coefficient is given to the LED point splicing bright concealed wire both sides, by repeatedly observing and revising, until reach ideal situation.This method not only efficiency is low, high to staff requirement, simultaneously also large especially to human eye harm.
In the bright concealed wire modification method of existing one splicing: the size of concatenation unit is unknown, multiple dot interlaces of the full frame shooting of LED display is lighted to the image of (be commonly called as dot interlace and play screen); Suppose selection 3 × 3 dot interlace, then in requisition for shooting nine images; For G primary colors (green) LED point, as shown in Figure 1, wherein " o " represents the LED point lighted to the LED point lighting mode of corresponding nine images, and " x " represents the lamp point do not lighted.First determining each LED lamp point region by point location after obtaining nine images, then locate each LED lamp dot center coordinate, is finally one by these nine image processing and tracking unit; After merging into an image, calculate each LED lamp point area, calculate correction coefficient by LED point area discrepancy.
But, for aforementioned prior art, (a) its need to take multiple images and then merged into one, owing to there is DE Camera Shake in bat figure process, LED point position has skew, there is error, the correction coefficient out of true calculated in the LED dot spacing that the image after therefore merging obtains; B () is due to the unknown of concatenation unit size, as long as therefore count on two LED lamp point area discrepancies to be greater than certain threshold value and just to think to there is gap, and carry out revising/correcting, therefore the position of not splicing gap also can be repaired, cause the screen body after correction of a final proof uneven; C () LED display screen body is larger, require that video camera distance screen body is far away, now need to take larger dot interlace (as K*K) to carry out image taking, therefore need the image more (K*K) taken; In addition, in shooting image process, there is DE Camera Shake, picture position has skew, and the error of introducing is just larger.
Summary of the invention
Therefore, for overcoming defect and the deficiency of prior art existence, the invention provides the bright concealed wire modification method of a kind of splicing.
Particularly, the bright concealed wire modification method of one splicing provided by the invention, comprise step: (a) determines described first concatenation unit and described second concatenation unit bright piece of the display of alternately arrangement and the size of display phaeodium in the row direction according to the size of the first concatenation unit adjacent in spliced display screen and the second concatenation unit, wherein said line direction is the direction away from the splicing gap between described first concatenation unit and described second concatenation unit, bright piece of described display comprises multiple display unit, and described display phaeodium comprises multiple display unit; B () controls bright piece of the multiple described display of lighting on described first concatenation unit and described second concatenation unit and obtains target image for carrying out shooting to described first concatenation unit and described second concatenation unit; C () carries out image procossing to obtain the respective gray scale center of bright piece of multiple described display to described target image; And the bright concealed wire of splicing that (d) correction coefficient of calculating each edge display unit in the described splicing gap of vicinity of described first concatenation unit and described second concatenation unit causes for splicing gap described in modifying factor.Wherein, step (d) specifically comprises following sub-step: (d1) is capable for each first displaying block that there is bright piece of described display in described target image, and the gray scale centre distance in utilizing described first displaying block capable between bright piece of two described displays of the side in described splicing gap or every side and corresponding number of display elements measure the capable display unit spacing of described first displaying block of correspondence; (d2) the gray scale centre distance between bright piece of two the described displays laying respectively at the both sides in described splicing gap in utilizing described first displaying block capable and corresponding display unit quantity and described display unit spacing obtain the capable splicing gap spacing of corresponding described first displaying block; And (d3) utilize described display unit spacing and described splicing gap spacing obtain described first displaying block capable in the correction coefficient of edge display unit in contiguous described splicing gap.
In one embodiment of the invention, above-mentioned steps (d) also comprises sub-step: using the correction coefficient of the mean value of the described correction coefficient of described edge display unit capable for adjacent two the first displaying blocks as the edge display unit in described splicing gap contiguous during the second displaying block that there is not bright piece of described display between described adjacent two the first displaying blocks are capable is capable.
In one embodiment of the invention, above-mentioned steps (d) also comprises sub-step: the mean value correction coefficient of two the edge display units being arranged in the vicinity described splicing gap of adjacent described first displaying block capable and described second displaying block capable intersection both sides being modified to the correction coefficient of the described adjacent edge display unit that the first displaying block is capable and the second displaying block is capable.
In one embodiment of the invention, bright piece of two described displays of the side or every side that are positioned at described splicing gap during described first displaying block in above-mentioned sub-step (d1) is capable are bright piece adjacent of two displays.
In one embodiment of the invention, bright piece of two the described displays laying respectively at the both sides in described splicing gap during described first displaying block in above-mentioned sub-step (d2) is capable are for laying respectively at the both sides in described splicing gap and bright piece of two of the most contiguous described splicing gap displays.
In one embodiment of the invention, the correction coefficient coef of the edge display unit in contiguous described splicing gap during described first displaying block in above-mentioned sub-step (d3) is capable
bright=1+ ((e+d)/d-1)/2, wherein e represents the capable display unit spacing of corresponding described first displaying block, and d represents the capable splicing gap spacing of corresponding described first displaying block.
In one embodiment of the invention, the most bond length of described first concatenation unit in above-mentioned steps (a) and the second concatenation unit is x; When the size of bright piece of described display and display phaeodium is determined to be h1 × h1, then meet relational expression h1 × 4≤x; When the size of bright piece of described display is defined as h1 × h1 and the size of described display phaeodium is defined as h2 × h1, then meet relational expression (h1+h2) × 2≤x.
In one embodiment of the invention, above-mentioned spliced display screen is LED display, and the first concatenation unit and the second concatenation unit are LED box or LED lamp panel, and display unit is LED point.
In addition, the one that another embodiment of the present invention provides splices bright concealed wire modification method, comprise step: according to the size of the first concatenation unit adjacent in spliced display screen and the second concatenation unit, (i) determines that described first concatenation unit and described second concatenation unit are expert at the size of multiple rectangle repetitives of repeated arrangement on column direction, wherein described in each, rectangle repetitive comprises multiple display unit; (ii) the multiple display units controlling the appointment corner position lighting rectangle repetitive described in each in the multiple described rectangle repetitive on described first concatenation unit and described second concatenation unit obtain target image for carrying out shooting to described first concatenation unit and described second concatenation unit, and wherein described multiple display unit of the described appointment corner position of rectangle repetitive described in each forms bright piece an of display; (iii) image procossing is carried out to obtain the respective gray scale center of bright piece of multiple described display to described target image; And the bright concealed wire of splicing that (iv) correction coefficient of calculating each edge display unit in the described splicing gap of vicinity of described first concatenation unit and described second concatenation unit causes for splicing gap described in modifying factor.Wherein, step (iv) specifically comprises following sub-step: capable for each first displaying block that there is bright piece of described display in described target image, and the gray scale centre distance in utilizing described first displaying block capable between bright piece of two described displays of the side in described splicing gap or every side and corresponding number of display elements measure the capable display unit spacing of described first displaying block of correspondence; Gray scale centre distance between bright piece of two the described displays laying respectively at the both sides in described splicing gap in utilizing described first displaying block capable and corresponding display unit quantity and described display unit spacing obtain the capable splicing gap spacing of corresponding described first displaying block; Utilize described display unit spacing and described splicing gap spacing obtain described first displaying block capable in the correction coefficient of edge display unit in contiguous described splicing gap; And using the correction coefficient of the mean value of the described correction coefficient of described edge display unit capable for adjacent two the first displaying blocks as the edge display unit in described splicing gap contiguous during the second displaying block that there is not bright piece of described display between described adjacent two the first displaying blocks are capable is capable.
In one embodiment of the invention, above-mentioned steps (iv) also comprises sub-step: the mean value correction coefficient of two the edge display units being arranged in the vicinity described splicing gap of adjacent described first displaying block capable and described second displaying block capable intersection both sides being modified to the correction coefficient of the described adjacent edge display unit that the first displaying block is capable and the second displaying block is capable.
As from the foregoing, the embodiment of the present invention utilizes the LED point lighting mode of the spliced display screen such as LED display of design, only needs shooting image just can accurately revise the bright concealed wire of splicing; Avoid existing method to take multiple images and make LED dot center calculate coarse problem.In addition, the embodiment of the present invention is in LED dot spacing computation process, and for each stitching portion, select the region of the bright concealed wire both sides of splicing to calculate LED dot spacing, it can reduce the error of calculation of lamp dot spacing further.In addition, existing method is undertaken splicing bright concealed wire by full frame analysis and is repaired, and introduce the problem that screen body homogeneity is deteriorated, and the embodiment of the present invention only carries out bright concealed wire repairing to the stitching portion between concatenation unit, can not introduce this problem.
By the detailed description below with reference to accompanying drawing, other side of the present invention and feature become obvious.But it should be known that this accompanying drawing is only the object design of explanation, instead of as the restriction of scope of the present invention, this is because it should with reference to additional claim.Should also be appreciated that, unless otherwise noted, unnecessaryly draw accompanying drawing to scale, they only try hard to structure described herein and flow process are described conceptually.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fig. 1 is a kind of LED point dot interlace lighting mode schematic diagram of the prior art.
Fig. 2 is the screen body LED point lighting mode schematic diagram of first embodiment of the invention.
Fig. 3 is that first embodiment of the invention takes the image obtained.
Fig. 4 be first embodiment of the invention utilize independent positioning method to locate LED to show bright piece and utilize grey scale centre of gravity to calculate LED to show the schematic diagram at the gray scale center of bright piece.
Fig. 5 is the schematic diagram of the calculating LED dot spacing of first embodiment of the invention.
Fig. 6 is the schematic diagram of the calculating splicing gap spacing of first embodiment of the invention.
Fig. 7 is the screen body LED point lighting mode schematic diagram of second embodiment of the invention.
Fig. 8 is that second embodiment of the invention takes the image obtained.
Fig. 9 be second embodiment of the invention utilize independent positioning method to locate LED to show bright piece and utilize grey scale centre of gravity to calculate LED to show the schematic diagram at the gray scale center of bright piece.
Figure 10 is the schematic diagram of the calculating LED dot spacing of second embodiment of the invention.
Figure 11 is the schematic diagram of the calculating splicing gap spacing of second embodiment of the invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
[the first embodiment]
Refer to Fig. 2 to Fig. 6, a kind of splicing bright concealed wire modification method being applicable to spliced display screen such as LED display that first embodiment of the invention provides can be realized by following technical scheme.Particularly:
First, the screen body LED point lighting mode of target LED display is calculated according to the concatenation unit size of target LED display, also body display unit lighting mode is namely shielded, because the size of concatenation unit (shown in Fig. 2 two adjacent concatenation unit) is known (for rectangle concatenation unit, namely its size is the LED pixel quantity on ranks direction), so the position of splicing gap in shooting image can clearly be known.In the present embodiment, capable for each displaying block comprising bright piece of display, both sides, stitching portion such as between concatenation unit all show phaeodiums 22,3 × 3 display bright piece 24 alternately arrangement by 3 × 3 from splicing gap 21 along the direction away from splicing gap 21, as shown in Figure 2, wherein " o " represents the same color LED point lighted, " x " represents the same color LED point do not lighted, single 3 × 3 display phaeodiums 22 comprise 9 with color LED point, and single 3 × 3 displays comprise 9 with color LED point for bright piece 24; Herein, be such as red LED lamp point, green LED lamp point or blue led lamp point with color LED point.In addition, can also find from Fig. 2: (such as go up with any one 3 × 3 multiple displaying block showing bright piece of 24 direct neighbors, under, left, displaying block in right and diagonal) be 3 × 3 display phaeodiums 22, and whole LED display can be regarded as and form by comprising one 3 × 3 display, 6 × 6 rectangle displaying blocks (repetitive) of bright piece 24 repeated arrangement on column direction of being expert at, (3 × 3 displays of the left side concatenation unit of such as Fig. 2 are all positioned at the upper left corner position of 6 × 6 rectangle displaying blocks for bright piece 24 to the corner position that 3 × 3 displays are arranged in 6 × 6 rectangle displaying blocks for bright piece 24, 3 × 3 displays of right side concatenation unit are all positioned at the upper right corner position of 6 × 6 rectangle displaying blocks for bright piece 24).Be understandable that herein, each concatenation unit also can not adopt above-mentioned lighting mode on the whole, such as just adopt above-mentioned lighting mode in the half region in the contiguous splicing gap of concatenation unit, and all do not light away from each LED point in second half region in splicing gap, it can realize the object of the bright concealed wire correction of splicing of the present embodiment equally.
Then, after lighting target LED display according to mode shown in Fig. 2, a screen volume image is taken, such as, shown in Fig. 3.Herein, because the size of concatenation unit is known, so splicing gap can clearly be known taking the position in the screen volume image that obtains.In figure 3, splicing gap between concatenation unit is arranged in wide middle black bar region, and this wider black bar region comprises splicing gap (dotted line also namely in Fig. 3) in the direction of the width and is divided into 6 of dotted line both sides in Fig. 3 does not light same color LED point (being yet the non-lightening LED lamp point in 3, every side).
Then, independent positioning method is utilized to locate each 3 × 3 display bright piece 24, as the white box in Fig. 4 from the above-mentioned view picture screen volume image obtained; Recycling grey scale centre of gravity method calculates the gray scale center of each 3 × 3 display bright piece 24.It should be noted that, independent positioning method and grey scale centre of gravity method are the image processing techniques that LED display alignment technique field is commonly used, therefore do not repeat them here herein.
Afterwards, the lamp dot spacing d of display unit spacing such as the present embodiment is calculated.Specifically can be: each displaying block existence 3 × 3 being shown to bright piece 24 is capable, get dotted line (corresponding splicing gap 21) each two 3 × 3 of left and right sides as shown in Figure 5 respectively and show bright piece 24 for calculating LED dot spacing d.Suppose that distance between two 3 × 3, dotted line left side display bright piece 24 (distance between the gray scale center of also i.e. 3 × 3 display bright piece 24) is d1, to there being same color LED point 6; On the right of dotted line two 3 × 3 display bright piece 24 between distance be d2, to there being same color LED point 6; Then LED point distance d=(d1+d2)/12.
Next, splicing gap spacing e is calculated.Specifically can be: each displaying block existence 3 × 3 being shown to bright piece 24 is capable, choose dotted line (corresponding splicing gap 21) as shown in Figure 6 and each side show bright piece 24 for one 3 × 3 for calculating splicing gap spacing e.According to the present embodiment aforementioned screen body lighting mode, between the splicing left and right sides 3 × 3, gap 21 display bright piece 24, (between the gray scale center of also i.e. 3 × 3 display bright piece 24) corresponding same color LED is counted is 9; Suppose that the distance of splicing between bright piece of the left and right sides 3 × 3, gap 21 display 24 is d3, then splice spacing e=d3-d × 9, gap.If e > 0, then think between concatenation unit to be splicing concealed wire, if e < 0, then think between concatenation unit to be splicing bright line, if e=0, then think there is not the bright concealed wire of splicing between concatenation unit.
Subsequently, correction coefficient coef is calculated.Specifically can be: each displaying block existence 3 × 3 being shown to bright piece 24 is capable, according to splicing gap spacing e, ask for the correction coefficient coef of each 3 the edge light points in both sides, stitching portion between concatenation unit (3 LED lamp points also namely in Fig. 2 in the left side in contiguous splicing gap 21 or right side first row, the 1st such as, in Fig. 2 in region 25,2 and 3 LED lamp points)
bright=1+ ((e+d)/d-1)/2; For not existing, 3 × 3 displays each displaying block of bright piece 24 is capable, the correction coefficient coef of each 3 the edge light points in the both sides, stitching portion between concatenation unit (3 LED lamp points also namely in Fig. 2 in the left side in contiguous splicing gap 21 or right side first row, the 4th such as, in Fig. 2 in region 25,5 and 6 LED lamp points)
darkbe calculated as follows: two displaying blocks its edge LED point calibration coefficient capable establishing adjacent existence 3 × 3 to show bright piece 24 is respectively coef
bright1, coef
bright2, then coef
dark=(coef
bright1+ coef
bright2)/2.In addition, preferably, the bright concealed wire of boxed area (displaying block) correction splicing is adopted to cause splicing the problem that gap place exists brightness step in order to eliminate, design following processing mode: the contiguous correction coefficient of splicing two edge LED points in gap 21 in the intersection both sides that adjacent two displaying blocks are capable is revised, suppose that the bright block size of display is 3 × 3, for comprising 3 × 3 displays bright piece 24 and do not comprise LED point (the 1st in such as Fig. 2 in the region 25, two groups of edges that 3 × 3 show the capable Zhong Mei side, both sides, splicing gap 21 of adjacent two displaying blocks of bright piece 24 on splicing gap 21 length direction, 2 and 3 LED lamp points are one group, 4th, 5 and 6 LED lamp points are another group), if its correction coefficient is respectively coef
bright, coef
dark, then the correction coefficient of splicing two edge LED points (the 3rd and 4 LED lamp points in such as Fig. 2 in region 25) of the adjacent capable intersection both sides of two displaying blocks on the length direction of gap 21 is modified to: coef
mid=(coef
bright+ coef
dark)/2.
In addition, the size of bright piece of the display in the technical scheme of first embodiment of the invention and display phaeodium can adjust according to the size of concatenation unit, if choose d1 according to this programme, d2 and d3, suppose that the most bond length in concatenation unit is x, showing bright piece with display phaeodium size is h1 × h1, then have h1 × 4≤x.
In aforementioned first embodiment, for the calculating of lamp dot spacing d, following replacement scheme can also be had: 1) splice the left and right sides, gap 21 and can select different displays bright piece of columns (such as splice on the left of gap 21 and select bright piece of the 1st and the 3rd row display), the left and right sides does not require certain symmetrical selection (such as splice on the left of gap and select the 1st and the 3rd bright piece of row display and bright piece of right side selection the 1st and the 2nd row display) simultaneously, calculates lamp dot spacing d with this; 2) certain side in splicing gap 21 is utilized to show bright piece but not both sides show bright piece to calculate lamp dot spacing d.The bright block gap of display that above two kinds of replacement schemes are selected less, the closer to splicing gap 21, the error calculating introducing is less.
For the calculating of aforementioned splicing gap spacing e, show bright piece of columns and select not fix requirement, only need splicing gap 21 to be included; But the display bright piece of columns selected is fewer, and the error of introducing is less.
Moreover 3 × 3 display phaeodiums mentioned in aforementioned first embodiment, the size of bright piece of 3 × 3 display can require adjustment according to realistic accuracy, as 4 × 4 display phaeodiums, bright piece of 4 × 4 display.
[the second embodiment]
Refer to Fig. 7 to Figure 11, a kind of splicing bright concealed wire modification method being applicable to spliced display screen such as LED display that second embodiment of the invention provides can be realized by following technical scheme.Particularly:
First, calculate the screen body LED point lighting mode of target LED display according to the concatenation unit size of target LED display, also namely shield body display unit lighting mode.Because the size of concatenation unit (shown in Fig. 7 two adjacent concatenation unit) is known, so the position of splicing gap in shooting image can clearly be known.In the present embodiment, capable for each displaying block comprising bright piece of display, the left side concatenation unit such as splicing gap 71 shows phaeodiums 72 along the direction away from splicing gap 71 by 5 × 3, 3 × 3 display bright piece 74 alternately arrangements, right side concatenation unit shows bright piece 74 along the direction away from splicing gap 71 by 3 × 3, 5 × 3 display phaeodium 72 alternately arrangements, as shown in Figure 7, wherein " o " represents the same color LED point lighted, " x " represents the same color LED point do not lighted, single 5 × 3 display phaeodiums 72 comprise 15 with color LED point, single 3 × 3 displays comprise 9 with color LED point for bright piece 74, herein, be such as red LED lamp point, green LED lamp point or blue led lamp point with color LED point.In addition, can also find from Fig. 7: (such as go up with any one 3 × 3 multiple displaying block showing bright piece of 74 direct neighbors, under, left, displaying block in right and diagonal) be display phaeodium, and whole LED display can be regarded as and form by comprising one 3 × 3 display, 8 × 8 rectangle displaying blocks (repetitive) of bright piece 24 repeated arrangement on column direction of being expert at, 3 × 3 displays are arranged in a corner position (left side of such as Fig. 7 and 3 × 3 displays of right side concatenation unit are all positioned at the upper left corner position of 8 × 68 shape displaying blocks for bright piece 24) of 8 × 8 rectangle displaying blocks for bright piece 74.Be understandable that herein, each concatenation unit also can not adopt above-mentioned lighting mode on the whole, such as just adopt above-mentioned lighting mode in the half region in the contiguous splicing gap of concatenation unit, and all do not light away from each LED point in second half region in splicing gap, it can realize the object of the bright concealed wire correction of splicing of the present embodiment equally.
Then, use image capture device such as CCD camera to take the target LED display lighted according to mode shown in Fig. 7 under dark room conditions, the image that shooting obtains as shown in Figure 8.Herein, because the size of concatenation unit is known, so splicing gap can clearly be known taking the position in the image that obtains.In fig. 8, splicing gap between concatenation unit is arranged in wide middle black bar region, and this wider black bar region comprises splicing gap (being also the dotted line in Fig. 8) in the direction of the width and 5 of being positioned on the left of dotted line do not light same color LED point.
Then, independent positioning method is utilized from the above-mentioned entire image obtained, to locate each 3 × 3 display bright piece 74, as the white box in Fig. 9; Recycling grey scale centre of gravity method calculates the gray scale center of each 3 × 3 display bright piece 74.It should be noted that, independent positioning method and grey scale centre of gravity method are the image processing techniques that LED display alignment technique field is commonly used, therefore do not repeat them here herein.
Afterwards, the lamp dot spacing d of display unit spacing such as the present embodiment is calculated.Specifically can be: in order to reduce the lamp point distance error of calculation brought because the arrangement of LED point is uneven, each displaying block existence 3 × 3 being shown to bright piece 74 is capable, get dotted line (corresponding splicing gap 71) each two 3 × 3 of left and right as shown in Figure 10 respectively and show bright piece 74 for calculating lamp dot spacing from d, as shown in Figure 10.Suppose that distance between two 3 × 3, dotted line (corresponding splicing gap 71) left side display bright piece 74 (distance between the gray scale center of also i.e. 3 × 3 display bright piece 74) is d1, to there being same color LED point 8; On the right of dotted line two 3 × 3 display bright piece 74 between distance be d2, to there being same color LED point 8; Then d=(d1+d2)/16.
Next, splicing gap spacing e is calculated.Specifically can be: each displaying block existence 3 × 3 being shown to bright piece 74 is capable, in order to reduce the error that centralized positioning is introduced, choosing the splicing left and right sides, gap 71 first row 3 × 3 and showing bright piece 74 for calculating splicing gap spacing e, as shown in figure 11.According to the present embodiment aforementioned screen body lighting mode, the splicing left and right sides, gap 71 first row 3 × 3 show bright piece 74 between corresponding same color LED to count be 8, suppose that the distance between splicing the left and right sides, gap 71 first row 3 × 3 shows bright piece 74 is d3, then e=d3-d × 8.If e > 0, then think between concatenation unit to be splicing concealed wire, if e < 0, then think between concatenation unit to be splicing bright line, if e=0, then think there is not the bright concealed wire of splicing between concatenation unit.
Subsequently, correction coefficient coef is calculated.Specifically can be: each displaying block existence 3 × 3 being shown to bright piece 74 is capable, according to splicing gap spacing e, ask for the correction coefficient coef of each 3 edge light points in both sides, stitching portion between concatenation unit (3 LED lamp points also namely in Fig. 7 in the left side in contiguous splicing gap 71 or right side first row, the 1st such as, in Fig. 7 in region 75,2 and 3 LED lamp points)
bright=1+ ((e+d)/d-1)/2; For not existing, 3 × 3 displays each displaying block of bright piece 74 is capable, each 5 the edge light point LED points in both sides, stitching portion between concatenation unit (5 LED lamp points also namely in Fig. 7 in the left side in contiguous splicing gap 71 or right side first row, the 4th such as, in Fig. 7 in region 75,5,6,7 and 8 LED lamp points) correction coefficient coef
darkbe calculated as follows: two displaying blocks its edge LED point calibration coefficient capable establishing adjacent existence 3 × 3 to show bright piece 74 is respectively coef
bright1, coef
bright2, then coef
dark=(coef
bright1+ coef
bright2)/2.
In addition, preferably, the bright concealed wire of boxed area (displaying block) correction splicing is adopted to cause splicing the problem that gap place exists brightness step in order to eliminate, design following processing mode: the contiguous correction coefficient of splicing two edge LED points in gap 71 in the intersection both sides that adjacent two displaying blocks are capable is revised, suppose that the bright block size of display is 3 × 3, for comprising 3 × 3 bright piece of displays and do not comprise LED point (the 1st in such as Fig. 7 in the region 75, two groups of edges that 3 × 3 show the capable Zhong Mei side, both sides, splicing gap 71 of adjacent two displaying blocks of bright piece on splicing gap 71 length direction, 2 and 3 LED lamp points are one group, 4th, 5, 6, 7 and 8 LED lamp points are another group), if its correction coefficient is respectively coef
bright, coef
dark, then the correction coefficient of splicing two edge LED points (the 3rd and 4 LED lamp points in such as Fig. 7 in region 75) of the adjacent capable intersection both sides of two displaying blocks on the length direction of gap 71 is modified to: coef
mid=coef
bright+ coef
dark)/2.
In addition, the size of bright piece of the display in the technical scheme of second embodiment of the invention and display phaeodium can adjust according to the size of concatenation unit, as chosen d1 according to this programme, d2 and d3, suppose that the most bond length in concatenation unit is x, to show bright block size be h1 × h1 and display phaeodium size is h2 × h1, then have (h1+h2) × 2≤x.
In aforementioned second embodiment, for the calculating of lamp dot spacing d, can also have following replacement scheme: 1) splice the left and right sides, gap 71 and can select different displays bright piece of columns, the left and right sides does not require certain symmetrical selection simultaneously, calculates lamp dot spacing d with this; 2) utilize certain side in splicing gap 71 to show bright piece and calculate lamp dot spacing d.The bright block gap of display that above two kinds of replacement schemes are selected less, the closer to splicing gap 71, the error calculating introducing is less.
For the calculating of aforementioned splicing gap spacing e, show bright piece of columns and select not fix requirement, only need splicing gap 71 to be included; But the display bright piece of columns selected is fewer, and the error of introducing is less.
Moreover 5 × 3 display phaeodiums mentioned in aforementioned second embodiment, the size of bright piece of 3 × 3 display can require adjustment according to realistic accuracy.
In addition, it is worth mentioning that, aforementioned first embodiment and the second embodiment are when spliced display screen is LED display, and its concatenation unit is such as LED lamp panel or LED box; It is appreciated of course that the spliced display screen of the embodiment of the present invention is not limited to LED display, also can be that the luminance parameter that other pass through to change edge display unit can revise the spliced LED display of splicing bright concealed wire.In addition, it is worth mentioning that, aforementioned first embodiment and the second embodiment are that the single color LED point lighted in LED display revises the bright concealed wire of splicing, correspondingly, aforesaid display unit is single color LED point, such as red LED lamp point, green LED lamp point or blue led lamp point; But the present invention is not as limit, also can light all LED modules with different colors lamp points in each LED pixel in LED display with same gray level (such as GTG 255) simultaneously and make each LED pixel present same color to carry out and splice bright concealed wire correction, such as RGB full-color LED display screen, the RGB LED point can lighted in each LED pixel with GTG 255 makes it present white, correspondingly, aforesaid display unit is single led pixel.
In sum, the above embodiment of the present invention utilizes the LED point lighting mode of the spliced display screen such as LED display of design, only needs shooting image just can accurately revise the bright concealed wire of splicing; Avoid existing method to take multiple images and make LED dot center calculate coarse problem.In addition, the embodiment of the present invention is in LED dot spacing computation process, and for each stitching portion, select the region of the bright concealed wire both sides of splicing to calculate LED dot spacing, it can reduce the error of calculation of lamp dot spacing further.In addition, existing method is undertaken splicing bright concealed wire by full frame analysis and is repaired, and introduce the problem that screen body homogeneity is deteriorated, and the embodiment of the present invention only carries out bright concealed wire repairing to the stitching portion between concatenation unit, can not introduce this problem.
So far, apply specific case herein and set forth the principle of the bright concealed wire modification method of splicing of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention; all will change in specific embodiments and applications; in sum, this description should not be construed as limitation of the present invention, and protection scope of the present invention should be as the criterion with appended claim.
Claims (10)
1. splice a bright concealed wire modification method, it is characterized in that, comprise step:
A () determines described first concatenation unit and described second concatenation unit bright piece of the display of alternately arrangement and the size of display phaeodium in the row direction according to the size of the first concatenation unit adjacent in spliced display screen and the second concatenation unit, wherein said line direction is the direction away from the splicing gap between described first concatenation unit and described second concatenation unit, bright piece of described display comprises multiple display unit, and described display phaeodium comprises multiple display unit;
B () controls bright piece of the multiple described display of lighting on described first concatenation unit and described second concatenation unit and obtains target image for carrying out shooting to described first concatenation unit and described second concatenation unit;
C () carries out image procossing to obtain the respective gray scale center of bright piece of multiple described display to described target image; And
The bright concealed wire of splicing that d correction coefficient that () calculates each edge display unit in the described splicing gap of vicinity of described first concatenation unit and described second concatenation unit causes for splicing gap described in modifying factor, and specifically comprise following sub-step:
(d1) capable for each first displaying block that there is bright piece of described display in described target image, the gray scale centre distance in utilizing described first displaying block capable between bright piece of two described displays of the side in described splicing gap or every side and corresponding number of display elements measure the capable display unit spacing of described first displaying block of correspondence;
(d2) the gray scale centre distance between bright piece of two the described displays laying respectively at the both sides in described splicing gap in utilizing described first displaying block capable and corresponding display unit quantity and described display unit spacing obtain the capable splicing gap spacing of corresponding described first displaying block; And
(d3) utilize described display unit spacing and described splicing gap spacing obtain described first displaying block capable in the correction coefficient of edge display unit in contiguous described splicing gap.
2. the bright concealed wire modification method of splicing as claimed in claim 1, it is characterized in that, step (d) also comprises sub-step: using the correction coefficient of the mean value of the described correction coefficient of described edge display unit capable for adjacent two the first displaying blocks as the edge display unit in described splicing gap contiguous during the second displaying block that there is not bright piece of described display between described adjacent two the first displaying blocks are capable is capable.
3. the bright concealed wire modification method of splicing as claimed in claim 2, it is characterized in that, step (d) also comprises sub-step: the mean value correction coefficient of two the edge display units being arranged in the vicinity described splicing gap of adjacent described first displaying block capable and described second displaying block capable intersection both sides being modified to the correction coefficient of the described adjacent edge display unit that the first displaying block is capable and the second displaying block is capable.
4. the bright concealed wire modification method of splicing as claimed in claim 1, it is characterized in that, in sub-step (d1), bright piece of two described displays of the side or every side that are positioned at described splicing gap during described first displaying block is capable are bright piece adjacent of two displays.
5. the bright concealed wire modification method of splicing as claimed in claim 1, it is characterized in that, in sub-step (d2), bright piece of two the described displays laying respectively at the both sides in described splicing gap during described first displaying block is capable are for laying respectively at the both sides in described splicing gap and bright piece of two of the most contiguous described splicing gap displays.
6. the bright concealed wire modification method of splicing as claimed in claim 1, is characterized in that, in sub-step (d3), and the correction coefficient coef of the edge display unit in contiguous described splicing gap during described first displaying block is capable
bright=1+ ((e+d)/d-1)/2, wherein e represents the capable display unit spacing of corresponding described first displaying block, and d represents the capable splicing gap spacing of corresponding described first displaying block.
7. the bright concealed wire modification method of splicing as claimed in claim 1, is characterized in that, in step (a), the most bond length of described first concatenation unit and the second concatenation unit is x; When the size of bright piece of described display and display phaeodium is determined to be h1 × h1, then meet relational expression h1 × 4≤x; When the size of bright piece of described display is defined as h1 × h1 and the size of described display phaeodium is defined as h2 × h1, then meet relational expression (h1+h2) × 2≤x.
8. the bright concealed wire modification method of splicing as claimed in claim 1, it is characterized in that, described spliced display screen is LED display, and described first concatenation unit and the second concatenation unit are LED box or LED lamp panel, and described display unit is LED point.
9. splice a bright concealed wire modification method, it is characterized in that, comprise step:
I according to the size of the first concatenation unit adjacent in spliced display screen and the second concatenation unit, () determines that described first concatenation unit and described second concatenation unit are expert at the size of multiple rectangle repetitives of repeated arrangement on column direction, wherein described in each, rectangle repetitive comprises multiple display unit;
(ii) the multiple display units controlling the appointment corner position lighting rectangle repetitive described in each in the multiple described rectangle repetitive on described first concatenation unit and described second concatenation unit obtain target image for carrying out shooting to described first concatenation unit and described second concatenation unit, and wherein described multiple display unit of the described appointment corner position of rectangle repetitive described in each forms bright piece an of display;
(iii) image procossing is carried out to obtain the respective gray scale center of bright piece of multiple described display to described target image; And
(iv) the bright concealed wire of splicing that the correction coefficient calculating each edge display unit in the described splicing gap of vicinity of described first concatenation unit and described second concatenation unit causes for splicing gap described in modifying factor, and specifically comprise following sub-step:
Capable for each first displaying block that there is bright piece of described display in described target image, the gray scale centre distance in utilizing described first displaying block capable between bright piece of two described displays of the side in described splicing gap or every side and corresponding number of display elements measure the capable display unit spacing of described first displaying block of correspondence;
Gray scale centre distance between bright piece of two the described displays laying respectively at the both sides in described splicing gap in utilizing described first displaying block capable and corresponding display unit quantity and described display unit spacing obtain the capable splicing gap spacing of corresponding described first displaying block;
Utilize described display unit spacing and described splicing gap spacing obtain described first displaying block capable in the correction coefficient of edge display unit in contiguous described splicing gap; And
Using the correction coefficient of the mean value of the described correction coefficient of described edge display unit capable for adjacent two the first displaying blocks as the edge display unit in described splicing gap contiguous during the second displaying block that there is not bright piece of described display between described adjacent two the first displaying blocks are capable is capable.
10. the bright concealed wire modification method of splicing as claimed in claim 9, it is characterized in that, step (iv) also comprises sub-step: the mean value correction coefficient of two the edge display units being arranged in the vicinity described splicing gap of adjacent described first displaying block capable and described second displaying block capable intersection both sides being modified to the correction coefficient of the described adjacent edge display unit that the first displaying block is capable and the second displaying block is capable.
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