CN104581135A - Light source brightness detection method and system - Google Patents
Light source brightness detection method and system Download PDFInfo
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- CN104581135A CN104581135A CN201310515675.5A CN201310515675A CN104581135A CN 104581135 A CN104581135 A CN 104581135A CN 201310515675 A CN201310515675 A CN 201310515675A CN 104581135 A CN104581135 A CN 104581135A
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Abstract
The invention provides a light source brightness detection method. The method comprises the following steps: acquiring an image of a to-be-detected product which is required to be detected by utilizing an imaging shooting device under the illumination of a light source; calculating to obtain the gray value of each pixel point of the image; detecting the light and shade degree and the uniformity of the brightness of the light source according to the gray value of each pixel point in the image. The invention further provides a light source brightness detection system. By utilizing the light source brightness detection method and the light source brightness detection system, whether the light and shade degree and the uniformity of the brightness of the light source meet the requirements or not can be detected rapidly.
Description
Technical field
The present invention relates to a kind of detection method and system, particularly about a kind of bright-dark degree of detection light source brightness and the method and system of uniformity.
Background technology
At present such as, at use checkout equipment, image measuring platform, during the concrete size of measurement products, generally all light source is arranged on the front end of the image capturing device that checkout equipment connects, for illumination.The brightness of light source can affect accuracy during checkout equipment measurement products size.The brightness of described light source comprises bright-dark degree and uniformity.Therefore, before detecting product, whether the brightness of light source meets the requirements needs to be detected.When whether the brightness of detection light source meets the requirements, the concrete size of multiple sample measured by checkout equipment under the illumination of light source, if all size measurings are all qualified, then illustrate that the brightness of light source meets the requirements, otherwise, need to carry out structure adjusting to the position, angle, light intensity etc. of light source particle in light source, circulate with this until the precision of size meets the requirements.The detection method of the brightness of this light source needs repeatedly to detect sample, and adjustment process is complicated, thus result in the waste of a large amount of manpower and materials.
Summary of the invention
In view of above content, be necessary to provide a kind of light-source brightness detection method and system, can the bright-dark degree of fast detecting light source brightness and uniformity whether meet the requirements.
A kind of light-source brightness detection method, be applied in computer, this computer is connected with checkout equipment and image capturing device.The method comprising the steps of: under the illumination of light source, utilize the acquisition of described image capturing device to need to carry out the image of the product to be measured detected; By calculating the gray value of each pixel in described image; The bright-dark degree of gray value to the brightness of light source according to each pixel in described image is detected; And detect according to the brightness uniformity of gray value to light source of each pixel in described image.
A kind of light-source brightness detection system, run in computer, this computer is connected with checkout equipment and image capturing device.This system comprises: image taking module, obtains the image needing to carry out the product to be measured detected for utilizing described image capturing device under the illumination of light source; Gradation processing module, for the gray value by calculating each pixel in described image; Light and shade detection module, detects for the bright-dark degree of gray value to the brightness of light source according to each pixel in described image; And uniformity detection module, detect for the brightness uniformity of gray value to light source according to each pixel in described image.
Compared to prior art, described light-source brightness detection method and system, image capturing device can be utilized under the illumination of light source to obtain the image of product, and by calculating the gray value of each pixel in this image, whether meet the requirements according to the bright-dark degree of the gray value determination light-source brightness of pixel each in this image and uniformity, and can the undesirable light source particle of brightness of positioned light source, thus realize the adjustment of the brightness of described light source, save detection time, reduce the complexity of adjustment.
Accompanying drawing explanation
Fig. 1 is the running environment figure of the better embodiment of light-source brightness detection system of the present invention.
Fig. 2 is the checkout equipment schematic diagram of the better embodiment of light-source brightness detection system of the present invention.
Fig. 3 is the functional block diagram of the better embodiment of light-source brightness detection system of the present invention.
Fig. 4 is the flow chart of light-source brightness detection method of the present invention preferred embodiment.
Fig. 5 is the schematic diagram of the corresponding relation of the identification color of the pixel corresponding to gray value in the tolerance range of light-source brightness detection method of the present invention preferred embodiment and tolerance range.
Main element symbol description
Computer 100
Light-source brightness detection system 10
Image taking module 11
Gradation processing module 12
Light and shade detection module 13
Uniformity detection module 14
Display device 20
Processor 30
Storage device 40
Checkout equipment 200
Image capturing device 300
Light source 400
Product 50 to be measured
Clamping jig 60
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Consulting shown in Fig. 1, is the running environment figure of the better embodiment of light-source brightness detection system of the present invention.Described light-source brightness detection system 10 is applied in computer 100.In this better embodiment, described computer 100 is connected with checkout equipment 200 and image capturing device 300 communication.Described computer 100 can also be server, main frame or other device.Described checkout equipment 200 can be all kinds of can to product 50(to be measured as shown in Figure 2) instrument that detects, such as, image measuring platform, three-dimensional scanning device and tool microscope etc.
Described image capturing device 300 can be the independent device of of being connected with described computer 100, can also be mounted in charge coupled cell (CCD, the Charge-coupled Device) imageing sensor on described checkout equipment 200.Described image capturing device 300 is at light source 400(as shown in Figure 2) illumination under shooting be placed on the clamping jig 60(of described checkout equipment 200 as shown in Figure 2) on needs carry out the image of the product to be measured 50 detected, and captured image is sent to described computer 100 to carry out follow-up process.
In the present embodiment, the image of described light-source brightness detection system 10 for utilizing the shooting of described image capturing device 300 to need to carry out the product to be measured 50 detected, and by calculating the gray value of all pixels in this image, whether meet the requirements according to the bright-dark degree of the brightness of the gray value detection light source 400 of pixels all in described image and uniformity.
Described computer 100 comprises display device 20, processor 30 and storage device 40.Bright-dark degree and the uniformity whether satisfactory testing result of described display device 20 for showing the brightness of described light source 400.Described processor 30 such as, for performing described light-source brightness detection system 10 and all kinds of softwares of installation in described computer 100, operating system etc.Described storage device 40 can be hard disk, or the storage card of other types or memory device.Described storage device 40 for storing Various types of data, such as, the information such as video, audio frequency, image, file, and data that are set for light-source brightness detection system described in memory 10 and that receive.
As shown in Figure 2, be the checkout equipment schematic diagram of better embodiment of light-source brightness detection system of the present invention.Described checkout equipment 200 comprises clamping jig 60 as described above, and described product 50 to be measured is positioned on this clamping jig 60.Described light source 400 is arranged on the front end of described image capturing device 300, illumination when taking described product 50 to be measured for image capturing device 300.This light source 400 can be LED(Light-Emitting Diode, light-emitting diode) lighting apparatus such as lighting source.The axis (as shown in dashed line in figure 2) of described light source 400 and the plane orthogonal at described clamping jig 60 place, and the dead in line or vertical of the axis of this light source 400 and the imaging plane of described image capturing device 300.Described light source 400 comprises multiple light source particle, and the bright-dark degree of the brightness of the plurality of light source particle can be inconsistent.Each light source particle is taken all to there being a regional extent in gained image at image capturing device 300, and such as this regional extent is the square that length and width is 1 centimetre.Whether the bright-dark degree of the brightness of each light source particle meets the requirements, and the gray value of the pixel in the regional extent corresponding to this light source particle is determined.
Element included in various kinds of equipment shown in Fig. 1 and Fig. 2 and annexation each other and attaching relation are only example, are not limited thereto in practical application.
As shown in Figure 3, be the functional block diagram of better embodiment of light-source brightness detection system of the present invention.In the present embodiment, described light-source brightness detection system 10 comprises multiple functional module, as: image taking module 11, gradation processing module 12, light and shade detection module 13 and uniformity detection module 14.
Module alleged by the present invention has been the program segment of a specific function, is more suitable for describing the implementation of software in described computer 100 than program.The concrete function of each module is described below with reference to Fig. 4.
As shown in Figure 4, be the flow chart of light-source brightness detection method of the present invention preferred embodiment.
First, step S2, described image taking module 11 controls described image capturing device 300 and takes the product to be measured 50 be positioned on described clamping jig 60 under the illumination of light source 400, and obtains the image of this product 50 to be measured from described image capturing device 300.Such as, described image taking module 11 by sending predetermined command to described image capturing device 300, thus controls the shooting that this image capturing device 300 carries out image.
Step S4, described gradation processing module 12 calculates the gray value Gray of each pixel in described image by mathematical method.
In this preferred embodiment, described gradation processing module 12 reads RGB (R, G, the B) value of each pixel in described image, and is calculated the gray value Gray of this each pixel by mathematical method.When calculating the gray value Gray of each pixel, described mathematical method can comprise: (1) floating-point arithmetic: gray value Gray=R*0.3+G*0.59+B*0.11, (2) integer method: gray value Gray=(R*30+G*59+B*11)/100, (3) displacement method: gray value Gray=(R*38+G*75+B*15) >>7, (4) mean value method: gray value Gray=(R+G+B)/3.
Step S6, described light and shade detection module 13 detects according to the bright-dark degree of gray value Gray to the brightness of light source 400 of each pixel in described image.
In this preferred embodiment, described light and shade detection module 13 judges whether the gray value Gray of each pixel in described image is all not less than a default gray value, whether meets the requirements with the bright-dark degree of the brightness of detection light source 400.By system or user, the bright-dark degree required by the brightness of light source 400 determines this default gray value, such as, is the arbitrary gray value in 110 to 130.When in described image, the gray value Gray of each pixel is all not less than described default gray value, described light and shade detection module 13 judges that the bright-dark degree of the brightness of light source 400 meets the requirements, now, the bright-dark degree of the brightness of all light source particles of described light source 400 all meets the requirements.When having at least the gray value Gray of a pixel to be less than described default gray value in described image, described light and shade detection module 13 judges that the bright-dark degree of the brightness of light source 400 is undesirable, now, the bright-dark degree of the brightness of at least one light source particle of described light source 400 is undesirable.
When the bright-dark degree of the brightness of light source 400 is undesirable, described light and shade detection module 13 is less than the position of the undesirable light source particle of bright-dark degree of the pixel determination brightness of described default gray value according to gray value Gray, and generate a light and shade color range figure according to the gray value Gray of pixels all in described image, and this light and shade color range figure is shown on display device 20 and checks for user.Gray value Gray in described image is less than the pixel that the pixel of described default gray value and gray value Gray be not less than described default gray value and identifies with two kinds of different colors respectively, to generate described light and shade color range figure by described light and shade detection module 13.Such as, pixel gray value Gray being less than described default gray value is designated redness, and pixel gray value Gray being not less than described default gray value is designated blueness, now, the bright-dark degree of the brightness of the light source particle of the light source 400 corresponding to blue region in described light and shade color range figure is undesirable.
Step S8, described uniformity detection module 14 detects according to the brightness uniformity of gray value Gray to light source 400 of each pixel in described image.
In this preferred embodiment, described uniformity detection module 14 judges whether the gray value Gray of each pixel in described image is all in a default intensity value ranges, whether meets the requirements with the brightness uniformity of detection light source 400.Interval range and the described default gray value of this default intensity value ranges bright-dark degree required by the brightness of light source 400 by system or user are determined, the minimum value of this default intensity value ranges should be more than or equal to above-mentioned default gray value, such as, described default intensity value ranges is that gray value is more than or equal to 115 and is less than or equal to 135.When in described image, the gray value Gray of each pixel is all in described default intensity value ranges, described uniformity detection module 14 judges that the brightness uniformity of light source 400 meets the requirements, now, the brightness uniformity of all light source particles of described light source 400 all meets the requirements.When having at least the gray value Gray of a pixel not to be in described default intensity value ranges in described image, described uniformity detection module 14 judges that the brightness uniformity of light source 400 is undesirable.Now, the brightness uniformity of at least one light source particle of described light source 400 is undesirable.
When the brightness uniformity of light source 400 is undesirable, described uniformity detection module 14 is not in the adjustment direction of the bright-dark degree of the position of pixel determination brightness uniformity undesirable light source particle in described default intensity value ranges and the brightness of the undesirable light source particle of this brightness uniformity according to gray value Gray.This adjustment direction comprises the bright-dark degree of brightness from low to high, and from high to low.The bright-dark degree that gray value Gray is less than the brightness of the light source particle corresponding to pixel of described default intensity value ranges minimum value is on the low side, now, and should be paramount by low adjustment by the bright-dark degree of the brightness of this light source particle; The bright-dark degree that gray value Gray is greater than the brightness of the light source particle corresponding to pixel of described default intensity value ranges maximum is higher, now, and should be extremely low by height adjustment by the bright-dark degree of the brightness of this light source particle.
Described uniformity detection module 14 generates a uniformity color range figure according to the gray value Gray of pixels all in described image, and is shown in by this uniformity color range figure on display device 20 and checks for user.In this preferred embodiment, gray value between 0 to 255 is divided into multiple different tolerance range according to described default intensity value ranges by described uniformity detection module 14, and the pixel corresponding to the gray value Gray in different tolerance ranges is designated different colors respectively, the corresponding relation of the identification color of the pixel corresponding to the gray value Gary in tolerance range and tolerance range, all pixels in described image are carried out colour code, to obtain described uniformity color range figure.Now, be not in the identification color corresponding to the pixel in described default intensity value ranges according to gray value Gray, the position of the undesirable light source particle of brightness uniformity can be determined in described uniformity color range figure.
In this preferred embodiment, numerical value between described default intensity value ranges maximum and 255 is divided into multiple upper tolerance range according to a pre-set tolerance by described uniformity detection module 14, and the pixel corresponding to the gray value Gray in each upper tolerance range is designated different colors.On this, pre-set tolerance is by user or Operation system setting, such as, be 17.Consult shown in Fig. 5, multiple upper tolerance range is: [135,152], [153,170], [171,188], [189,206], [207,224], [225,242], and [243,255], the color of the mark of the pixel corresponding to gray value Gray in the plurality of upper tolerance range is respectively: pale yellow, yellow, golden, shallow orange, orange, red, dark red.Now, the color of mark from shallow to deep, facilitates user to determine the brightness value that light source particle will adjust on described adjustment direction.Numerical value between described default intensity value ranges minimum value and 0 is also divided into multiple lower tolerance range according to described pre-set tolerance by described uniformity detection module 14, and the pixel corresponding to the gray value Gray in each lower tolerance range is designated different colors, now, the lower tolerance range color identified and the color that upper tolerance range identifies is all not identical.Consult shown in Fig. 5, the corresponding relation of the identification color of the pixel of sequence number 9 to sequence number 15 corresponding to the gray value Gary in lower tolerance range and lower tolerance range.
Above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to above preferred embodiment to invention has been detailed description, those of ordinary skill in the art should be appreciated that and can modify to technical scheme of the present invention or be equal to the spirit and scope of replacing and should not depart from technical solution of the present invention.
Claims (10)
1. a light-source brightness detection method, is applied in computer, and this computer is connected with checkout equipment and image capturing device, it is characterized in that, the method comprising the steps of:
Under the illumination of light source, utilize the acquisition of described image capturing device to need to carry out the image of the product to be measured detected;
By calculating the gray value of each pixel in described image;
The bright-dark degree of gray value to the brightness of light source according to each pixel in described image is detected; And
The brightness uniformity of gray value to light source according to each pixel in described image detects.
2. light-source brightness detection method as claimed in claim 1, it is characterized in that, the method detects the bright-dark degree of the brightness of light source in the following manner:
Judge whether the gray value of each pixel in described image is all not less than a default gray value;
When the gray value of each pixel is all not less than described default gray value in described image, judge that the bright-dark degree of the brightness of light source meets the requirements; And
When having at least the gray value of a pixel to be less than described default gray value in described image, judge that the bright-dark degree of the brightness of light source is undesirable, and be less than the position of the light source particle of the undesirable light source of bright-dark degree of the pixel determination brightness of described default gray value according to gray value.
3. light-source brightness detection method as claimed in claim 2, it is characterized in that, the method is further comprising the steps of:
Gray value in described image being less than the pixel that the pixel of described default gray value and gray value be not less than described default gray value identifies with two kinds of different colors, to generate a light and shade color range figure respectively.
4. light-source brightness detection method as claimed in claim 1, it is characterized in that, the method detects the brightness uniformity of light source in the following manner:
Judge whether the gray value of each pixel in described image is all in a default intensity value ranges;
When the gray value of each pixel is all in described default intensity value ranges in described image, judge that the brightness uniformity of light source meets the requirements; And
When having at least the gray value of a pixel not to be in described default intensity value ranges in described image, judge that the brightness uniformity of light source is undesirable, and be not in the adjustment direction of the bright-dark degree of the position of the light source particle of the undesirable light source of pixel determination brightness uniformity in described default intensity value ranges and the brightness of the undesirable light source particle of this brightness uniformity according to gray value.
5. light-source brightness detection method as claimed in claim 4, it is characterized in that, the method is further comprising the steps of:
Gray value between 0 to 255 is divided into multiple different tolerance range according to described default intensity value ranges, and the pixel corresponding to the gray value in different tolerance ranges is designated different colors respectively; And
All pixels in described image are carried out colour code by the corresponding relation of the identification color of the pixel corresponding to the gray value in tolerance range and tolerance range, to obtain a uniformity color range figure.
6. a light-source brightness detection system, runs in computer, and this computer is connected with checkout equipment and image capturing device, it is characterized in that, this system comprises:
Image taking module, obtains the image needing to carry out the product to be measured detected for utilizing described image capturing device under the illumination of light source;
Gradation processing module, for the gray value by calculating each pixel in described image;
Light and shade detection module, detects for the bright-dark degree of gray value to the brightness of light source according to each pixel in described image; And
Uniformity detection module, detects for the brightness uniformity of gray value to light source according to each pixel in described image.
7. light-source brightness detection system as claimed in claim 6, it is characterized in that, described light and shade detection module is detected by the bright-dark degree of following steps to the brightness of light source:
Judge whether the gray value of each pixel in described image is all not less than a default gray value;
When the gray value of each pixel is all not less than described default gray value in described image, judge that the bright-dark degree of the brightness of light source meets the requirements; And
When having at least the gray value of a pixel to be less than described default gray value in described image, judge that the bright-dark degree of the brightness of light source is undesirable, and be less than the position of the light source particle of the undesirable light source of bright-dark degree of the pixel determination brightness of described default gray value according to gray value.
8. light-source brightness detection system as claimed in claim 7, it is characterized in that, described light and shade detection module also for, gray value in described image being less than the pixel that the pixel of described default gray value and gray value be not less than described default gray value identifies with two kinds of different colors, to generate a light and shade color range figure respectively.
9. light-source brightness detection system as claimed in claim 6, it is characterized in that, described uniformity detection module is detected by the brightness uniformity of following steps to light source:
Judge whether the gray value of each pixel in described image is all in a default intensity value ranges;
When the gray value of each pixel is all in described default intensity value ranges in described image, judge that the brightness uniformity of light source meets the requirements; And
When having at least the gray value of a pixel not to be in described default intensity value ranges in described image, judge that the brightness uniformity of light source is undesirable, and be not in the adjustment direction of the bright-dark degree of the position of the light source particle of the undesirable light source of pixel determination brightness uniformity in described default intensity value ranges and the brightness of the undesirable light source particle of this brightness uniformity according to gray value.
10. light-source brightness detection system as claimed in claim 9, it is characterized in that, described uniformity detection module also for, gray value between 0 to 255 is divided into multiple different tolerance range according to described default intensity value ranges, and the pixel corresponding to the gray value in different tolerance ranges is designated different colors respectively, and the corresponding relation of the identification color of pixel corresponding to the gray value in tolerance range and tolerance range, all pixels in described image are carried out colour code, to obtain a uniformity color range figure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310515675.5A CN104581135A (en) | 2013-10-28 | 2013-10-28 | Light source brightness detection method and system |
| TW102139877A TWI614483B (en) | 2013-10-28 | 2013-11-01 | Method and system for detecting luminance of a light source |
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| CN201310515675.5A CN104581135A (en) | 2013-10-28 | 2013-10-28 | Light source brightness detection method and system |
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| CN104581135A true CN104581135A (en) | 2015-04-29 |
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| CN201310515675.5A Pending CN104581135A (en) | 2013-10-28 | 2013-10-28 | Light source brightness detection method and system |
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| TW (1) | TWI614483B (en) |
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| CN105976767A (en) * | 2016-06-28 | 2016-09-28 | 凌云光技术集团有限责任公司 | Area source brightness uniformity adjusting method, device and system |
| CN107702793A (en) * | 2017-10-31 | 2018-02-16 | 深圳前海百炼光特种照明有限公司 | A kind of test system and method for testing of hot spot light distribution |
| CN107734324A (en) * | 2017-10-11 | 2018-02-23 | 广东小天才科技有限公司 | Method and system for measuring illumination uniformity of flash lamp and terminal equipment |
| CN108827597A (en) * | 2018-05-02 | 2018-11-16 | 信利光电股份有限公司 | A kind of the hot spot uniformity detection method and detection system of structured light projection device |
| CN109115333A (en) * | 2018-08-06 | 2019-01-01 | Oppo广东移动通信有限公司 | The detection method and detection system of laser projecting apparatus |
| CN110992465A (en) * | 2019-12-05 | 2020-04-10 | 深圳科瑞技术股份有限公司 | Light source uniformity processing method, device and system |
| CN111044261A (en) * | 2019-12-27 | 2020-04-21 | 深圳盛达同泽科技有限公司 | Method, device, storage medium and system for detecting illumination uniformity of eye fundus camera |
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| CN105976767A (en) * | 2016-06-28 | 2016-09-28 | 凌云光技术集团有限责任公司 | Area source brightness uniformity adjusting method, device and system |
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| CN107734324A (en) * | 2017-10-11 | 2018-02-23 | 广东小天才科技有限公司 | Method and system for measuring illumination uniformity of flash lamp and terminal equipment |
| CN107702793A (en) * | 2017-10-31 | 2018-02-16 | 深圳前海百炼光特种照明有限公司 | A kind of test system and method for testing of hot spot light distribution |
| CN108827597A (en) * | 2018-05-02 | 2018-11-16 | 信利光电股份有限公司 | A kind of the hot spot uniformity detection method and detection system of structured light projection device |
| CN109115333A (en) * | 2018-08-06 | 2019-01-01 | Oppo广东移动通信有限公司 | The detection method and detection system of laser projecting apparatus |
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| CN113820576B (en) * | 2020-06-17 | 2023-11-14 | Tcl科技集团股份有限公司 | Method and device for testing light-emitting diode device |
| CN113155845A (en) * | 2021-04-09 | 2021-07-23 | 武汉精测电子集团股份有限公司 | Light source, setting method thereof, optical detection method and system |
| CN114723671A (en) * | 2022-03-10 | 2022-07-08 | 深圳灿维科技有限公司 | Image preprocessing method and device, computer equipment and storage medium |
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| TW201518694A (en) | 2015-05-16 |
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