CN106662484A - Calibration method and apparatus for brightness detection value and chrominance detection value of optical camera - Google Patents
Calibration method and apparatus for brightness detection value and chrominance detection value of optical camera Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
Abstract
A calibration method and apparatus for a brightness detection value and a chrominance detection value of an optical camera. The calibration method comprises: dividing a brightness range of a reference display screen into a predetermined number of screen brightness levels; calculating a brightness correction factor; calculating a chrominance correction factor at various screen brightness levels; and using the brightness correction factor and the chrominance correction factor to calibrate a brightness value to be calibrated and a chrominance value to be calibrated which are obtained by an optical camera detecting a display screen to be calibrated, so as to obtain a brightness calibration value and a chrominance calibration value. In this calibration method, a brightness detection value and a chrominance detection value which are obtained through the detection by the optical camera may be corrected as a brightness detection value and a chrominance detection value which are obtained through detection by a reference detection device, so as to reduce errors between a brightness detection value and an actual brightness value and between a chrominance detection value and an actual chrominance value when an optical camera is used to perform brightness and chrominance detections of a display screen.
Description
The present invention relates to manufacture field, more particularly to optical camera brightness detected value and colorimetric detection value calibration method and device.
With becoming increasingly popular for intelligent terminal, the application of all kinds of display screens is more and more wider.Due to reasons such as production technologies, display screen is after being produced, it is understood that there may be colour cast or the abnormal situation of brightness.Therefore, it is necessary to colourity and brightness calibration be carried out to it, to eliminate colour cast or the abnormal problem of brightness, it is to avoid the display screen of existing defects comes into operation before display screen is come into operation.
When carrying out colourity and brightness calibration to display screen, it is necessary to obtain display screen colourity and the actual value of brightness first, then judge the actual value whether in the error range of default specification value.If the actual value is not in the error range of specification value, modifying factor is generated according to the error between actual value and specification value, and modifying factor is write in the driving of display screen, so as to complete the correction to display screen colourity and brightness.
In the prior art optical camera would generally be used to detect display screen colourity and brightness; and it will detect that obtained brightness detected value, as the intrinsic brilliance value of display screen color, will detect that obtained colorimetric detection value is used as the actual chromatic value of display screen using optical camera using optical camera.But it is due to that optical camera accuracy in detection is relatively low, so as to can cause there can be larger error between brightness detected value and brightness actual value and between colorimetric detection value and colourity actual value, influences the degree of accuracy to display screen colourity and gamma correction.
The content of the invention
The embodiments of the invention provide optical camera brightness detected value and colorimetric detection value calibration method and device, during solving to detect LCDs colourity and brightness using optical camera, the problem of detected value that optical camera is detected and the larger actual value error of LCDs colourity and brightness.
In a first aspect, the embodiment of the present invention provides a kind of optical camera brightness detected value and colorimetric detection value calibration method, including：The brightness range of benchmark display screen is divided into the screen intensity grade of predetermined quantity；According to the optical camera and benchmaring equipment, to the benchmark display screen, each screen intensity grade carries out the different brightness measurements that brightness measurement is obtained, and calculates the brightness correction factor；According under each screen intensity grade, the optical camera and described
Benchmaring equipment carries out the different color measurements that colour measurement is obtained to the benchmark display screen, calculates the Color correction factor under each screen intensity grade；Detect that the brightness value to be calibrated that display screen to be calibrated is obtained is calibrated with chromatic value to be calibrated using the brightness correction factor and optical camera described in the Color correction factor pair, so as to obtain brightness calibration value and colourity calibration value.
With reference to first aspect, in first aspect in the first possible implementation, described according to the optical camera and benchmaring equipment, to the benchmark display screen, each screen intensity grade carries out the different brightness measurements that brightness measurement is obtained, and calculating the brightness correction factor includes：Brightness measurement is carried out to the benchmark display screen under each screen intensity grade using the optical camera, each screen intensity grade is obtained and distinguishes corresponding optical camera brightness detected value；Brightness measurement is carried out to the benchmark display screen under each screen intensity grade using the benchmaring equipment, each screen intensity grade is obtained and distinguishes corresponding benchmaring device brightness detected value；According to the corresponding relation between optical camera brightness detected value under each brightness degree and benchmaring device brightness detected value, the brightness correction factor is calculated.
The first possible implementation with reference to first aspect, in second of possible implementation of first aspect, calculates the Color correction factor specified under screen intensity grade in the following way：The chromaticity range of the benchmark display screen is divided into the screen chrominance levels of predetermined quantity；Under specified screen intensity grade, colour measurement is carried out to the benchmark display screen under each screen chrominance levels using the optical camera, optical camera colorimetric detection value corresponding with each screen chrominance levels difference is obtained；Under specified screen intensity grade, brightness measurement is carried out to the benchmark display screen under each screen chrominance levels using the benchmaring equipment, benchmaring equipment colorimetric detection value corresponding with each screen chrominance levels difference is obtained；According to optical camera colorimetric detection value under the specified chrominance levels and benchmaring equipment colorimetric detection value, the Color correction factor specified under screen intensity grade is calculated.
With reference to first aspect or the possible implementation any of which of the first to two kind of first aspect, in first aspect in the third possible implementation, the brightness value to be calibrated for using the brightness correction factor and optical camera described in the Color correction factor pair to detect that display screen to be calibrated is obtained carries out calibration with chromatic value to be calibrated to be included：Obtain optical camera and detect chromatic value to be calibrated and brightness value to be calibrated that the display screen to be calibrated is obtained；The brightness value to be calibrated is calibrated to intensity modifier value using the brightness correction factor；Using the intensity modifier value as benchmaring device brightness detected value, the corresponding target screen brightness degree of the intensity modifier value is determined；Obtain the target colorimetric modifying factor corresponding to the target screen brightness degree；The chromatic value to be calibrated is calibrated to Color correction value using the target colorimetric modifying factor.
Second aspect, the embodiment of the present invention provides a kind of optical camera brightness detected value and colorimetric detection value calibration device, including：Division unit, the screen intensity grade for the brightness range of benchmark display screen to be divided into predetermined quantity；It is bright
Modifying factor computing unit is spent, for each screen intensity grade to carry out the different brightness measurements that brightness measurement is obtained to the benchmark display screen according to the optical camera and the benchmaring equipment, the brightness correction factor is calculated；Color correction factor calculating unit, for according under each screen intensity grade, the optical camera and the benchmaring equipment carry out the different color measurements that colour measurement is obtained to the benchmark display screen, calculate the Color correction factor under each screen intensity grade；Alignment unit, for detecting that the brightness value to be calibrated that display screen to be calibrated is obtained is calibrated with chromatic value to be calibrated using the brightness correction factor and optical camera described in the Color correction factor pair, so as to obtain brightness calibration value and colourity calibration value.
With reference to second aspect, in second aspect in the first possible implementation, the brightness correction factor calculating unit includes：First brightness measurement subelement, for carrying out brightness measurement to the benchmark display screen under each screen intensity grade using the optical camera, obtains each screen intensity grade and distinguishes corresponding optical camera brightness detected value；Second brightness measurement subelement, for carrying out brightness measurement to the benchmark display screen under each screen intensity grade using the benchmaring equipment, obtains each screen intensity grade and distinguishes corresponding benchmaring device brightness detected value；First computation subunit, for according to the corresponding relation between optical camera brightness detected value under each brightness degree and benchmaring device brightness detected value, calculating the brightness correction factor.
The first possible implementation with reference to second aspect, in second of possible implementation of second aspect, the Color correction factor calculating unit includes：Chrominance levels divide subelement, the screen chrominance levels for the chromaticity range of the benchmark display screen to be divided into predetermined quantity；First colour measurement subelement, under specified screen intensity grade, carrying out colour measurement to the benchmark display screen under each screen chrominance levels using the optical camera, obtaining optical camera colorimetric detection value corresponding with each screen chrominance levels difference；Second colour measurement subelement, for under specified screen intensity grade, brightness measurement is carried out to the benchmark display screen under each screen chrominance levels using the benchmaring equipment, benchmaring equipment colorimetric detection value corresponding with each screen chrominance levels difference is obtained；Second computation subunit, for according to optical camera colorimetric detection value under the specified chrominance levels and benchmaring equipment colorimetric detection value, calculating the Color correction factor specified under screen intensity grade.
With reference to second aspect or the possible implementation any of which of the first to two kind of second aspect, in second aspect in the third possible implementation, the alignment unit includes：Value to be calibrated obtains subelement, and chromatic value to be calibrated and brightness value to be calibrated that the display screen to be calibrated is obtained are detected for obtaining optical camera；Brightness correction subelement, for the brightness value to be calibrated to be calibrated into intensity modifier value using the brightness correction factor；Brightness degree obtains subelement, for the intensity modifier value as benchmaring device brightness detected value, to be determined to the corresponding target screen brightness degree of the intensity modifier value；The Color correction factor obtains subelement, for obtaining the target colorimetric modifying factor corresponding to the target screen brightness degree；Color correction subelement, for the chromatic value to be calibrated to be calibrated into Color correction value using the target colorimetric modifying factor.
The third aspect, the embodiment of the present invention additionally provides a kind of optical camera brightness detected value and colorimetric detection value calibration device, the device includes transceiver and processor, the processor, the screen intensity grade for the brightness range of benchmark display screen to be divided into predetermined quantity；According to the optical camera and benchmaring equipment, to the benchmark display screen, each screen intensity grade carries out the different brightness measurements that brightness measurement is obtained, and calculates the brightness correction factor；According under each screen intensity grade, the optical camera and the benchmaring equipment carry out the different color measurements that colour measurement is obtained to the benchmark display screen, calculate the Color correction factor under each screen intensity grade；The brightness value to be calibrated received using the brightness correction factor with the Color correction factor pair transceiver is calibrated with chromatic value to be calibrated, so as to obtain brightness calibration value and colourity calibration value, wherein the brightness value to be calibrated detects that display screen to be calibrated is obtained with the chromatic value to be calibrated by the optical camera.
Fourth aspect, the embodiment of the present invention additionally provides a kind of optical camera, it is characterised in that including processor and detector, the detector, for detecting display screen to be calibrated so as to obtain brightness value to be calibrated and chromatic value to be calibrated；The processor, the screen intensity grade for the brightness range of benchmark display screen to be divided into predetermined quantity；According to the optical camera and benchmaring equipment, to the benchmark display screen, each screen intensity grade carries out the different brightness measurements that brightness measurement is obtained, and calculates the brightness correction factor；According under each screen intensity grade, the optical camera and the benchmaring equipment carry out the different color measurements that colour measurement is obtained to the benchmark display screen, calculate the Color correction factor under each screen intensity grade；Calibrated using the brightness correction factor with brightness value to be calibrated described in the Color correction factor pair and the chromatic value to be calibrated, so as to obtain brightness calibration value and colourity calibration value.
In the present embodiment, the brightness range of benchmark display screen is divided into the screen intensity grade of predetermined quantity；According to the optical camera and benchmaring equipment, to the benchmark display screen, each screen intensity grade carries out the different brightness measurements that brightness measurement is obtained, and calculates the brightness correction factor；According under each screen intensity grade, the optical camera and the benchmaring equipment carry out the different color measurements that colour measurement is obtained to the benchmark display screen, calculate the Color correction factor under each screen intensity grade；Detect that the brightness value to be calibrated that display screen to be calibrated is obtained is calibrated with chromatic value to be calibrated using the brightness correction factor and optical camera described in the Color correction factor pair, so as to obtain brightness calibration value and colourity calibration value.Using the present embodiment, the brightness correction factor and the Color correction factor of the optical camera relative to benchmaring equipment can be obtained；And detect that the brightness value to be calibrated that display screen to be calibrated is obtained is calibrated with chromatic value to be calibrated using the brightness correction factor and optical camera described in the Color correction factor pair, when carrying out brightness of display screen with colorimetric detection using optical camera so as to reduce, the error between brightness detected value and brightness actual value and between colorimetric detection value and colourity actual value.
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, apparently, for those of ordinary skills, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is optical camera brightness detected value of the present invention and the flow chart of colorimetric detection value calibration method one embodiment；
Fig. 2 is optical camera brightness detected value of the present invention and the structural representation of colorimetric detection value calibration device one embodiment；
Fig. 3 is the structural representation of another embodiment of optical camera brightness detected value of the present invention Yu colorimetric detection value calibration device；
Fig. 4 is the structural representation of optical camera one embodiment of the present invention.
Applicants have found that, in for display screen colourity and the various detection devices of brightness detection, the detection efficiency of point type color analyzer is relatively low, but accuracy in detection is of a relatively high, using detection device LCDs colourity and brightness are detected obtained by detected value and LCDs colourity and the actual value of brightness between error it is relatively small.Therefore, before being detected using optical camera to LCDs colourity and brightness, point type color analyzer can be regard as benchmaring equipment, under detection target same case, on the basis of error between the detected value that the detected value and point type color analyzer got by optical camera is got, the detected value that optical camera is got is corrected, so as to improve the degree of accuracy of detected value when being detected using optical camera.Herein it should be noted that in addition to point type color analyzer, the of a relatively high equipment of other accuracy in detection can also be used as benchmaring equipment.
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, the embodiment of the description is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
It is the schematic diagram of optical camera brightness detected value of the present invention and colorimetric detection value calibration method one embodiment referring to Fig. 1.
Step 101, the brightness range of benchmark display screen is divided into the screen intensity grade of predetermined quantity.
To optical camera brightness detected value and during colorimetric detection value calibration, can obtain first the brightness correction factor and
The Color correction factor, then detect that the brightness value to be calibrated that display screen to be calibrated is obtained is calibrated with chromatic value to be calibrated using the brightness correction factor and optical camera described in the Color correction factor pair, so as to obtain brightness calibration value and colourity calibration value, wherein, the brightness correction factor, for when detecting that target is consistent, the optical camera to be carried out to the detection target to detect that obtained optical camera brightness detected value is modified to the benchmaring equipment and the detection target is carried out detecting obtained benchmaring device brightness detected value；The colourity repaiies proper factor, for detecting target unanimously and in the case of detection object brightness identical, the optical camera is carried out to the detection target to detect that obtained optical camera colorimetric detection value is modified to the benchmaring equipment and the detection target is carried out detecting obtained benchmaring equipment colorimetric detection value, detection target here can be LCDs etc..
Due to when display screen is in different brightness degrees, error may be different between optical camera colorimetric detection value and benchmaring equipment colorimetric detection value, therefore when generating the brightness correction factor and the Color correction factor, the brightness range of benchmark display screen can be divided into the screen intensity grade of predetermined quantity first；Then according to the optical camera and the benchmaring equipment, to the benchmark display screen, each screen intensity grade carries out the different brightness measurements that brightness measurement is obtained, and calculates the brightness correction factor；Further according under each screen intensity grade, the optical camera and the benchmaring equipment carry out the different color measurements that colour measurement is obtained to the benchmark display screen, calculate the Color correction factor under each screen intensity grade.
Specifically, can according to display screen difference by display screen from most bright to a number of brightness degree is most secretly divided into, the quantity of brightness degree can be configured according to calibration accuracy, the brightness degree of display screen can be set into 256 grades under normal circumstances.
Step 102, according to the optical camera and the benchmaring equipment, to the benchmark display screen, each screen intensity grade carries out the different brightness measurements that brightness measurement is obtained, and calculates the brightness correction factor.
After the completion of brightness degree division, the optical camera can be used to carry out brightness measurement to the benchmark display screen under each screen intensity grade, obtain each screen intensity grade and distinguish corresponding optical camera brightness detected value；And brightness measurement is carried out to the benchmark display screen under each screen intensity grade using the benchmaring equipment, obtain each screen intensity grade and distinguish corresponding benchmaring device brightness detected value.For example, when the screen intensity grade of display screen is divided into 256 grades, 256 optical camera brightness detected values can be obtained, and 256 benchmaring device brightness detected values, wherein, each screen intensity grade has a corresponding optical camera brightness detected value and a benchmaring device brightness detected value.Wherein, optical camera brightness detected value and benchmaring device brightness detected value can be obtained by the way of complete white picture is shot.
Because each optical camera brightness detected value and a benchmaring device brightness detected value are uniquely corresponding, therefore can be according between optical camera brightness detected value under each brightness degree and benchmaring device brightness detected value
Corresponding relation, calculate the brightness correction factor.Calculating the mode of the brightness correction factor has a lot, for example, optical camera brightness detected value can be regard as independent variable, and it regard corresponding benchmaring device brightness detected value as dependent variable, carry out linear fit, so as to obtain a fitting function, the fitting function can serve as the brightness correction factor.Or the first detection function between screen intensity grade and optical camera brightness detected value can also be first fitted respectively, and the second detection function between screen intensity grade and benchmaring device brightness detected value, then the first detection function and the second detection function are determined into the functional relation between optical camera brightness detected value and benchmaring device brightness detected value, and regard the functional relation as the brightness correction factor.
Step 103, according under each screen intensity grade, the optical camera and the benchmaring equipment carry out the different color measurements that colour measurement is obtained to the benchmark display screen, calculate the Color correction factor under each screen intensity grade.
After the determination of the brightness correction factor, the Color correction factor under different screen brightness degree can be calculated respectively.The Color correction factor under screen intensity grade is specified to calculate in the following way：The chromaticity range of benchmark display screen is divided into the screen chrominance levels of predetermined quantity；Under specified screen intensity grade, colour measurement is carried out to the benchmark display screen under each screen chrominance levels using the optical camera, optical camera colorimetric detection value corresponding with each screen chrominance levels difference is obtained；Under specified screen intensity grade, brightness measurement is carried out to the benchmark display screen under each screen chrominance levels using the benchmaring equipment, benchmaring equipment colorimetric detection value corresponding with each screen chrominance levels difference is obtained；According to optical camera colorimetric detection value under the specified chrominance levels and benchmaring equipment colorimetric detection value, the Color correction factor specified under screen intensity grade is calculated.Wherein, screen intensity grade is specified divide any one in screen chrominance levels in advance.Screen chrominance levels can also be divided as required.
Because each optical camera colorimetric detection value and a benchmaring equipment colorimetric detection value are uniquely corresponding, therefore the Color correction factor can be calculated according to the corresponding relation between optical camera colorimetric detection value under each chrominance levels and benchmaring equipment colorimetric detection value.Calculating the mode of the Color correction factor has a lot, for example, optical camera colorimetric detection value can be regard as independent variable, and it regard corresponding benchmaring equipment colorimetric detection value as dependent variable, carry out linear fit, so as to obtain a fitting function, the fitting function can serve as the Color correction factor.Or the first detection function between screen chrominance levels and optical camera colorimetric detection value can also be first fitted respectively, and the second detection function between screen chrominance levels and benchmaring equipment colorimetric detection value, then the first detection function and the second detection function are determined into the functional relation between optical camera colorimetric detection value and benchmaring equipment colorimetric detection value, and regard the functional relation as the Color correction factor.
Herein it should be noted that optical camera can first carry out brightness measurement to benchmark display screen, then it is aobvious to benchmark
Display screen carries out colour measurement, or, brightness measurement and colour measurement can also be carried out to benchmark display screen simultaneously.When carrying out brightness measurement and colour measurement to benchmark display screen at the same time, benchmark display screen can be set pure white picture is shown under each brightness degree, then the benchmark display screen is shot using optical camera, the optical camera brightness detected value and optical camera colorimetric detection value of each brightness degree is then extracted from the picture photographed.Likewise, benchmaring equipment equally can also carry out brightness measurement and colour measurement to benchmark display screen simultaneously.For example, benchmark display screen can be set pure white picture is shown under each brightness degree, then the benchmark display screen is shot using benchmaring equipment, the benchmaring device brightness detected value and benchmaring equipment colorimetric detection value of each brightness degree is then extracted from the picture photographed.
In alternatively possible implementation, when calibrating brightness detected value with colorimetric detection value, optical camera can also directly obtain the brightness correction factor and the Color correction factor generated.
Step 104, detect that the brightness value to be calibrated that display screen to be calibrated is obtained is calibrated with chromatic value to be calibrated using the brightness correction factor and optical camera described in the Color correction factor pair, so as to obtain brightness calibration value and colourity calibration value.
When being calibrated to brightness value to be calibrated and chromatic value to be calibrated, optical camera can be obtained first and detects chromatic value to be calibrated and brightness value to be calibrated that the display screen to be calibrated is obtained；Then the brightness value to be calibrated is calibrated to intensity modifier value using the brightness correction factor；And using the intensity modifier value as benchmaring device brightness detected value, determine the corresponding target screen brightness degree of the intensity modifier value；The target colorimetric modifying factor corresponding to the target screen brightness degree is obtained again；Then the chromatic value to be calibrated is calibrated to Color correction value using the target colorimetric modifying factor..
For example, if getting brightness value to be calibrated for X, it then can use the brightness correction factor that X is modified into intensity modifier value Y, then using Y as benchmaring device brightness detected value, obtain display screen target screen brightness degree to be detected when benchmaring device brightness detected value is Y；Then the Color correction factor corresponding to the target screen brightness degree is obtained；And the chromatic value A to be calibrated is calibrated to Color correction value B using the Color correction factor.
If when being detected to display screen to be calibrated, having got multigroup brightness value to be calibrated and chromatic value to be calibrated, then it can be calibrated by group in the manner previously described.
In the present embodiment, the brightness range of benchmark display screen is divided into the screen intensity grade of predetermined quantity；According to the optical camera and benchmaring equipment, to the benchmark display screen, each screen intensity grade carries out the different brightness measurements that brightness measurement is obtained, and calculates the brightness correction factor；According under each screen intensity grade, the optical camera and the benchmaring equipment carry out the different colour measurements that colour measurement is obtained to the benchmark display screen
Value, calculates the Color correction factor under each screen intensity grade；Detect that the brightness value to be calibrated that display screen to be calibrated is obtained is calibrated with chromatic value to be calibrated using the brightness correction factor and optical camera described in the Color correction factor pair, so as to obtain brightness calibration value and colourity calibration value.Using the present embodiment, the brightness correction factor and the Color correction factor of the optical camera relative to benchmaring equipment can be obtained；And detect that the brightness value to be calibrated that display screen to be calibrated is obtained is calibrated with chromatic value to be calibrated using the brightness correction factor and optical camera described in the Color correction factor pair, when carrying out brightness of display screen with colorimetric detection using optical camera so as to reduce, the error between brightness detected value and brightness actual value and between colorimetric detection value and colourity actual value.
It is the schematic diagram of optical camera brightness detected value of the present invention and colorimetric detection value calibration device one embodiment referring to Fig. 2.
As shown in Fig. 2 described device includes：Division unit 201, brightness correction factor calculating unit 202, Color correction factor calculating unit 203, alignment unit 204.
Wherein, division unit 201, the screen intensity grade for the brightness range of benchmark display screen to be divided into predetermined quantity；Brightness correction factor calculating unit 202, for each screen intensity grade to carry out the different brightness measurements that brightness measurement is obtained to the benchmark display screen according to the optical camera and the benchmaring equipment, calculates the brightness correction factor；Color correction factor calculating unit 203, for according under each screen intensity grade, the optical camera and the benchmaring equipment carry out the different color measurements that colour measurement is obtained to the benchmark display screen, calculate the Color correction factor under each screen intensity grade；Alignment unit 204, for detecting that the brightness value to be calibrated that display screen to be calibrated is obtained is calibrated with chromatic value to be calibrated using the brightness correction factor and optical camera described in the Color correction factor pair, so as to obtain brightness calibration value and colourity calibration value.
Optionally, the brightness correction factor calculating unit 202 can include：First brightness measurement subelement, for carrying out brightness measurement to the benchmark display screen under each screen intensity grade using the optical camera, obtains each screen intensity grade and distinguishes corresponding optical camera brightness detected value；Second brightness measurement subelement, for carrying out brightness measurement to the benchmark display screen under each screen intensity grade using the benchmaring equipment, obtains each screen intensity grade and distinguishes corresponding benchmaring device brightness detected value；First computation subunit, for according to the corresponding relation between optical camera brightness detected value under each brightness degree and benchmaring device brightness detected value, calculating the brightness correction factor.
Optionally, the Color correction factor calculating unit 203 can include：Chrominance levels divide subelement, the screen chrominance levels for the chromaticity range of benchmark display screen to be divided into predetermined quantity；First colour measurement subelement, under specified screen intensity grade, carrying out colour measurement to the benchmark display screen under each screen chrominance levels using the optical camera, obtaining optical camera colorimetric detection value corresponding with each screen chrominance levels difference；Second
Colour measurement subelement, for under specified screen intensity grade, brightness measurement is carried out to the benchmark display screen under each screen chrominance levels using the benchmaring equipment, benchmaring equipment colorimetric detection value corresponding with each screen chrominance levels difference is obtained；Second computation subunit, for according to optical camera colorimetric detection value under the specified chrominance levels and benchmaring equipment colorimetric detection value, calculating the Color correction factor specified under screen intensity grade.
Optionally, the alignment unit 204 can include：Value to be calibrated obtains subelement, and chromatic value to be calibrated and brightness value to be calibrated that the display screen to be calibrated is obtained are detected for obtaining optical camera；Brightness correction subelement, for the brightness value to be calibrated to be calibrated into intensity modifier value using the brightness correction factor；Brightness degree obtains subelement, for the intensity modifier value as benchmaring device brightness detected value, to be determined to the corresponding target screen brightness degree of the intensity modifier value；The Color correction factor obtains subelement, for obtaining the target colorimetric modifying factor corresponding to the target screen brightness degree；Color correction subelement, for the chromatic value to be calibrated to be calibrated into Color correction value using the target colorimetric modifying factor.
Using the present embodiment, it can will detect that obtaining brightness detected value and colorimetric detection value is modified to brightness detected value and the colorimetric detection value that the detection of benchmaring equipment is obtained using optical camera, when carrying out brightness of display screen with colorimetric detection using optical camera so as to reduce, the error between brightness detected value and brightness actual value and between colorimetric detection value and colourity actual value.
It is the structural representation of another embodiment of optical camera brightness detected value of the present invention Yu colorimetric detection value calibration device referring to Fig. 3.
Fig. 3 is understood, in the specific implementation, the calibrating installation can be made up of processor 301 with transceiver 302, can also be including other necessary components of the grade of memory 303 in addition to processor 301 and transceiver 302；Constituting can be connected by one or more bus between each component of the calibrating installation.
Wherein, the processor 301, for obtaining the brightness correction factor and the Color correction factor of the optical camera relative to benchmaring equipment；The brightness value to be calibrated received using the brightness correction factor with the Color correction factor pair transceiver 302 is calibrated with chromatic value to be calibrated, so as to obtain brightness calibration value and colourity calibration value, wherein the brightness value to be calibrated detects that display screen to be calibrated is obtained with the chromatic value to be calibrated by the optical camera.
Optionally, the processor 301 is additionally operable to the brightness range of benchmark display screen being divided into the screen intensity grade of predetermined quantity；According to the optical camera and the benchmaring equipment, to the benchmark display screen, each screen intensity grade carries out the different brightness measurements that brightness measurement is obtained, and calculates the brightness correction factor；According under each screen intensity grade, the optical camera and the benchmaring equipment carry out the different color measurements that colour measurement is obtained to the benchmark display screen, calculate the Color correction factor under each screen intensity grade.
Optionally, the processor 301 is also used for the optical camera and carries out brightness measurement to the benchmark display screen under each screen intensity grade, obtains each screen intensity grade and distinguishes corresponding optical camera brightness detected value；Brightness measurement is carried out to the benchmark display screen under each screen intensity grade using the benchmaring equipment, each screen intensity grade is obtained and distinguishes corresponding benchmaring device brightness detected value；According to the corresponding relation between optical camera brightness detected value under each brightness degree and benchmaring device brightness detected value, the brightness correction factor is calculated.
Optionally, the processor 301 is additionally operable to the chromaticity range of benchmark display screen being divided into the screen chrominance levels of predetermined quantity；Under specified screen intensity grade, colour measurement is carried out to the benchmark display screen under each screen chrominance levels using the optical camera, optical camera colorimetric detection value corresponding with each screen chrominance levels difference is obtained；Under specified screen intensity grade, brightness measurement is carried out to the benchmark display screen under each screen chrominance levels using the benchmaring equipment, benchmaring equipment colorimetric detection value corresponding with each screen chrominance levels difference is obtained；According to optical camera colorimetric detection value under the specified chrominance levels and benchmaring equipment colorimetric detection value, the Color correction factor specified under screen intensity grade is calculated.
Optionally, the processor 301 is additionally operable to obtain chromatic value to be calibrated and brightness value to be calibrated that the optical camera detection display screen to be calibrated is obtained；The brightness value to be calibrated is calibrated to intensity modifier value using the brightness correction factor；Using the intensity modifier value as benchmaring device brightness detected value, the corresponding target screen brightness degree of the intensity modifier value is determined；Obtain the target colorimetric modifying factor corresponding to the target screen brightness degree；The chromatic value to be calibrated is calibrated to Color correction value using the target colorimetric modifying factor.
Using the present embodiment, it can will detect that obtaining brightness detected value and colorimetric detection value is modified to brightness detected value and the colorimetric detection value that the detection of benchmaring equipment is obtained using optical camera, when carrying out brightness of display screen with colorimetric detection using optical camera so as to reduce, the error between brightness detected value and brightness actual value and between colorimetric detection value and colourity actual value.
It is the structural representation of optical camera one embodiment of the present invention referring to Fig. 4.
Fig. 4 is understood, in the specific implementation, the optical camera can be made up of processor 401 and detector 402, in addition to processor 401 and detector 402, can also include other necessary components such as memory 403, transceiver 404；Constituting can be connected by one or more bus between each described optical component.
Wherein, the detector 402, for detecting display screen to be calibrated so as to obtain brightness value to be calibrated and chromatic value to be calibrated；The processor 401, for obtaining the brightness correction factor and the Color correction factor of the optical camera relative to benchmaring equipment；Calibrated using the brightness correction factor with brightness value to be calibrated described in the Color correction factor pair and the chromatic value to be calibrated, so as to obtain brightness calibration value and colourity calibration value.
Optionally, the processor 401 is additionally operable to the brightness range of benchmark display screen being divided into the screen intensity grade of predetermined quantity；According to the detector 402 and the benchmaring equipment, to the benchmark display screen, each screen intensity grade carries out the different brightness measurements that brightness measurement is obtained, and calculates the brightness correction factor；According under each screen intensity grade, the detector 402 and the benchmaring equipment carry out the different color measurements that colour measurement is obtained to the benchmark display screen, calculate the Color correction factor under each screen intensity grade.
Optionally, the processor 401 is also used for the detector 402 and carries out brightness measurement to the benchmark display screen under each screen intensity grade, obtains each screen intensity grade and distinguishes the corresponding brightness detected value of detector 402；Brightness measurement is carried out to the benchmark display screen under each screen intensity grade using the benchmaring equipment, each screen intensity grade is obtained and distinguishes corresponding benchmaring device brightness detected value；According to the corresponding relation between the brightness detected value of detector under each brightness degree 402 and benchmaring device brightness detected value, the brightness correction factor is calculated.
Optionally, the processor 401 is additionally operable to the chromaticity range of benchmark display screen being divided into the screen chrominance levels of predetermined quantity；Under specified screen intensity grade, colour measurement is carried out to the benchmark display screen under each screen chrominance levels using the detector 402, the colorimetric detection value of detector 402 corresponding with each screen chrominance levels difference is obtained；Under specified screen intensity grade, brightness measurement is carried out to the benchmark display screen under each screen chrominance levels using the benchmaring equipment, benchmaring equipment colorimetric detection value corresponding with each screen chrominance levels difference is obtained；According to the colorimetric detection value of detector 402 under the specified chrominance levels and benchmaring equipment colorimetric detection value, the Color correction factor specified under screen intensity grade is calculated.
Optionally, the processor 401 is additionally operable to acquisition detector 402 and detects chromatic value to be calibrated and brightness value to be calibrated that the display screen to be calibrated is obtained；The brightness value to be calibrated is calibrated to intensity modifier value using the brightness correction factor；Using the intensity modifier value as benchmaring device brightness detected value, the corresponding target screen brightness degree of the intensity modifier value is determined；Obtain the target colorimetric modifying factor corresponding to the target screen brightness degree；The chromatic value to be calibrated is calibrated to Color correction value using the target colorimetric modifying factor.
Using the present embodiment, it can will detect that obtaining brightness detected value and colorimetric detection value is modified to brightness detected value and the colorimetric detection value that the detection of benchmaring equipment is obtained using optical camera, when carrying out brightness of display screen with colorimetric detection using optical camera so as to reduce, the error between brightness detected value and brightness actual value and between colorimetric detection value and colourity actual value.
In implementing, the present invention also provides a kind of computer-readable storage medium, wherein, the computer-readable storage medium can have program stored therein, and the program may include the part or all of step in the optical camera brightness detected value and each embodiment of colorimetric detection value calibration method that the present invention is provided when performing.Described storage medium can be magnetic disc, CD, read-only storage note
Recall body (Read-Only Memory, ROM) or random access memory (Random Access Memory, RAM) etc..
Those skilled in the art can be understood that the technology in the embodiment of the present invention can add the mode of required general hardware platform to realize by software.Understood based on such, the part that technical scheme in the embodiment of the present invention substantially contributes to prior art in other words can be embodied in the form of software product, the computer software product can be stored in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions to cause a computer equipment (can be personal computer, server, or the network equipment etc.) perform method described in some parts of each embodiment of the invention or embodiment.
Each embodiment in this specification is described by the way of progressive, and identical similar part is mutually referring to what each embodiment was stressed is the difference with other embodiment between each embodiment.For device and optical camera embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, the relevent part can refer to the partial explaination of embodiments of method.
The embodiments of the present invention described above are not intended to limit the scope of the present invention.Any modifications, equivalent substitutions and improvements made within the spirit and principles in the present invention etc., should be included in the scope of the protection.
Claims (10)
- A kind of optical camera brightness detected value and colorimetric detection value calibration method, it is characterised in that including：The brightness range of benchmark display screen is divided into the screen intensity grade of predetermined quantity；According to the optical camera and benchmaring equipment, to the benchmark display screen, each screen intensity grade carries out the different brightness measurements that brightness measurement is obtained, and calculates the brightness correction factor；According under each screen intensity grade, the optical camera and the benchmaring equipment carry out the different color measurements that colour measurement is obtained to the benchmark display screen, calculate the Color correction factor under each screen intensity grade；Detect that the brightness value to be calibrated that display screen to be calibrated is obtained is calibrated with chromatic value to be calibrated using the brightness correction factor and optical camera described in the Color correction factor pair, so as to obtain brightness calibration value and colourity calibration value.
- The method as described in claim 1, it is characterised in that described each screen intensity grade carries out the different brightness measurements that brightness measurement is obtained to the benchmark display screen according to the optical camera and benchmaring equipment, and calculating the brightness correction factor includes：Brightness measurement is carried out to the benchmark display screen under each screen intensity grade using the optical camera, each screen intensity grade is obtained and distinguishes corresponding optical camera brightness detected value；Brightness measurement is carried out to the benchmark display screen under each screen intensity grade using the benchmaring equipment, each screen intensity grade is obtained and distinguishes corresponding benchmaring device brightness detected value；According to the corresponding relation between optical camera brightness detected value under each brightness degree and benchmaring device brightness detected value, the brightness correction factor is calculated.
- Method as claimed in claim 2, it is characterised in that calculate the Color correction factor specified under screen intensity grade in the following way：The chromaticity range of the benchmark display screen is divided into the screen chrominance levels of predetermined quantity；Under specified screen intensity grade, colour measurement is carried out to the benchmark display screen under each screen chrominance levels using the optical camera, optical camera colorimetric detection value corresponding with each screen chrominance levels difference is obtained；Under specified screen intensity grade, brightness measurement is carried out to the benchmark display screen under each screen chrominance levels using the benchmaring equipment, benchmaring equipment colorimetric detection value corresponding with each screen chrominance levels difference is obtained；According to optical camera colorimetric detection value under the specified chrominance levels and benchmaring equipment colorimetric detection value, the Color correction factor specified under screen intensity grade is calculated.
- Method as described in any one of claims 1 to 3, it is characterised in that the brightness value to be calibrated for using the brightness correction factor and optical camera described in the Color correction factor pair to detect that display screen to be calibrated is obtained carries out calibration with chromatic value to be calibrated to be included：Obtain optical camera and detect chromatic value to be calibrated and brightness value to be calibrated that the display screen to be calibrated is obtained；The brightness value to be calibrated is calibrated to intensity modifier value using the brightness correction factor；Using the intensity modifier value as benchmaring device brightness detected value, the corresponding target screen brightness degree of the intensity modifier value is determined；Obtain the target colorimetric modifying factor corresponding to the target screen brightness degree；The chromatic value to be calibrated is calibrated to Color correction value using the target colorimetric modifying factor.
- A kind of optical camera brightness detected value and colorimetric detection value calibration device, it is characterised in that including：Division unit, the screen intensity grade for the brightness range of benchmark display screen to be divided into predetermined quantity；Brightness correction factor calculating unit, for each screen intensity grade to carry out the different brightness measurements that brightness measurement is obtained to the benchmark display screen according to the optical camera and the benchmaring equipment, calculates the brightness correction factor；Color correction factor calculating unit, for according under each screen intensity grade, the optical camera and the benchmaring equipment carry out the different color measurements that colour measurement is obtained to the benchmark display screen, calculate the Color correction factor under each screen intensity grade；Alignment unit, for detecting that the brightness value to be calibrated that display screen to be calibrated is obtained is calibrated with chromatic value to be calibrated using the brightness correction factor and optical camera described in the Color correction factor pair, so as to obtain brightness calibration value and colourity calibration value.
- Device as claimed in claim 5, it is characterised in that the brightness correction factor calculating unit includes：First brightness measurement subelement, for carrying out brightness measurement to the benchmark display screen under each screen intensity grade using the optical camera, obtains each screen intensity grade and distinguishes corresponding optical camera brightness detected value；Second brightness measurement subelement, for carrying out brightness measurement to the benchmark display screen under each screen intensity grade using the benchmaring equipment, obtains each screen intensity grade and distinguishes corresponding benchmaring equipment Brightness detected value；First computation subunit, for according to the corresponding relation between optical camera brightness detected value under each brightness degree and benchmaring device brightness detected value, calculating the brightness correction factor.
- Device as claimed in claim 6, it is characterised in that the Color correction factor calculating unit includes：Chrominance levels divide subelement, the screen chrominance levels for the chromaticity range of the benchmark display screen to be divided into predetermined quantity；First colour measurement subelement, under specified screen intensity grade, carrying out colour measurement to the benchmark display screen under each screen chrominance levels using the optical camera, obtaining optical camera colorimetric detection value corresponding with each screen chrominance levels difference；Second colour measurement subelement, for under specified screen intensity grade, brightness measurement is carried out to the benchmark display screen under each screen chrominance levels using the benchmaring equipment, benchmaring equipment colorimetric detection value corresponding with each screen chrominance levels difference is obtained；Second computation subunit, for according to optical camera colorimetric detection value under the specified chrominance levels and benchmaring equipment colorimetric detection value, calculating the Color correction factor specified under screen intensity grade.
- Device as described in any one of claim 5 value 7, it is characterised in that the alignment unit includes：Value to be calibrated obtains subelement, and chromatic value to be calibrated and brightness value to be calibrated that the display screen to be calibrated is obtained are detected for obtaining optical camera；Brightness correction subelement, for the brightness value to be calibrated to be calibrated into intensity modifier value using the brightness correction factor；Brightness degree obtains subelement, for the intensity modifier value as benchmaring device brightness detected value, to be determined to the corresponding target screen brightness degree of the intensity modifier value；The Color correction factor obtains subelement, for obtaining the target colorimetric modifying factor corresponding to the target screen brightness degree；Color correction subelement, for the chromatic value to be calibrated to be calibrated into Color correction value using the target colorimetric modifying factor.
- A kind of optical camera brightness detected value and colorimetric detection value calibration device, it is characterised in that including transceiver and processor,The processor, screen intensity for the brightness range of benchmark display screen to be divided into predetermined quantity etc. Level；According to the optical camera and benchmaring equipment, to the benchmark display screen, each screen intensity grade carries out the different brightness measurements that brightness measurement is obtained, and calculates the brightness correction factor；According under each screen intensity grade, the optical camera and the benchmaring equipment carry out the different color measurements that colour measurement is obtained to the benchmark display screen, calculate the Color correction factor under each screen intensity grade；The brightness value to be calibrated received using the brightness correction factor with the Color correction factor pair transceiver is calibrated with chromatic value to be calibrated, so as to obtain brightness calibration value and colourity calibration value, wherein the brightness value to be calibrated detects that display screen to be calibrated is obtained with the chromatic value to be calibrated by the optical camera.
- A kind of optical camera, it is characterised in that including processor and detector,The detector, for detecting display screen to be calibrated so as to obtain brightness value to be calibrated and chromatic value to be calibrated；The processor, the screen intensity grade for the brightness range of benchmark display screen to be divided into predetermined quantity；According to the optical camera and benchmaring equipment, to the benchmark display screen, each screen intensity grade carries out the different brightness measurements that brightness measurement is obtained, and calculates the brightness correction factor；According under each screen intensity grade, the optical camera and the benchmaring equipment carry out the different color measurements that colour measurement is obtained to the benchmark display screen, calculate the Color correction factor under each screen intensity grade；Calibrated using the brightness correction factor with brightness value to be calibrated described in the Color correction factor pair and the chromatic value to be calibrated, so as to obtain brightness calibration value and colourity calibration value.
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| PCT/CN2015/077408 WO2016169055A1 (en) | 2015-04-24 | 2015-04-24 | Calibration method and apparatus for brightness detection value and chrominance detection value of optical camera |
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| CN108877688A (en) * | 2017-05-12 | 2018-11-23 | 京东方科技集团股份有限公司 | Backlight brightness control method and device |
| CN108648697A (en) * | 2018-03-30 | 2018-10-12 | 中兴通讯股份有限公司 | Screen intensity calibration method, apparatus and system, computer readable storage medium |
| CN115310050B (en) * | 2022-10-10 | 2023-01-24 | 杭州三海电子有限公司 | Data calibration method, system, medium and equipment for electronic equipment aging |
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| WO2016169055A1 (en) | 2016-10-27 |
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