CN109979382A - Imaging system color correcting method and system under screen based on screen transmitted spectrum - Google Patents
Imaging system color correcting method and system under screen based on screen transmitted spectrum Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- H—ELECTRICITY
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Abstract
The invention discloses imaging system color correcting method and systems under a kind of screen based on screen transmitted spectrum, and when mainly for carrying out shielding lower imaging through screen using imaging system under shielding, the colour cast problem generated to acquired image is corrected.Wherein, method includes the following steps: obtaining screen sample transmitance first with the distribution of wavelength；Initial compensation matrix is generated according to distribution to compensate to lower imaging system is shielded；Imaging test is carried out to imaging system under the screen after compensating approach and obtains test image；According to test image correction-compensation matrix, compensated using revised compensation matrix to lower imaging system colour cast phenomenon is shielded；Finally according to the continuous correction-compensation matrix of test result, until colour cast situation further weakens and reach use demand, the colour cast phenomenon for shielding lower imaging system is modified.This method, which can make to shield lower imaging system and carry out no color differnece imaging, especially mobile device front camera to infinite point object, be imaged under screen.
Description
Technical field
The present invention relates to technical field of image processing, in particular to system is imaged under a kind of screen based on screen transmitted spectrum
System color correcting method and system.
Background technique
For imaging system under screen, due to OLED (Organic Light Emitting Diode organic light emission
Diode) screen is the Multi-level display device with the transparent material production of certain transmitance, shielded through OLED screen curtain
When lower imaging, due to entering to inject, transmitance of each band of light in OLED screen curtain is different in the white light of imaging system under screen, into
And when causing to shoot image using imaging system under screen, there is color compared to photographic subjects scene in image color obtained
Distortion phenomenon.In response to this problem, it needs to carry out colorific adjustment amendment to imaging system under screen.
The domestic commercial camera bearing calibration used is completed based on D65 light source and reflective Standard colour board at present.It should
Method utilizes RGB (standard industry color mode) value that color lump is corresponded in the imaging results and standard color card of imaging system to be corrected
Corresponding relationship is established, to complete to correct.Meanwhile for different digital imaging systems, also there is different colorific adjustment methods.
Such as a kind of multispectral camera color correcting method, for satellite multispectral camera, the Uniform Illumination generated using integrating sphere light source
Standard color card color lump imaging and standard color card color lump legitimate reading are compared under light, completed to space remote sensing multispectral camera
Colour correction, but this method is not particularly suited for flow line production and calibration scene, therefore propose a kind of portable electronic device
The colour correction of imaging system is very necessary under OLED screen curtain.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, an object of the present invention is to provide imaging system colors under a kind of screen based on screen transmitted spectrum
Bearing calibration.
It is another object of the present invention to propose imaging system color school under a kind of screen based on screen transmitted spectrum
Positive system.
In order to achieve the above objectives, one aspect of the present invention proposes imaging system color under the screen based on screen transmitted spectrum
Bearing calibration, comprising the following steps: step S1 obtains the transmittance graph of OLED screen curtain sample using spectrometer；Step S2, root
The initial compensation matrix of the OLED screen curtain sample is determined according to the transmittance graph；Step S3 utilizes the initial compensation square
Battle array carries out pre-calibration to imaging system under screen；Step S4, using imaging system under the screen after pre-calibration to standard color card into
Capable test of taking pictures, obtains the RGB triple channel test value of corresponding region in test result；Step S5, by the RGB of the corresponding region
Three lane testing values are compared determining compensation matrix with color standard value in the standard card；Step S6 utilizes the benefit
It repays matrix to calibrate imaging system under the screen, and imaging test is carried out to the standard color card, judge whether there is
Colour cast phenomenon, then repeating said steps S4-S6 then exports compensation result if it does not exist if it exists.
Imaging system color correcting method under the screen based on screen transmitted spectrum of the embodiment of the present invention, by utilizing light
The screen sample transmission spectrum of spectrometer acquisition simultaneously carries out pre-calibration to imaging system under screen according to spectrum, after recycling pre-calibration
System shooting test carried out to standard color card obtain average calibration value, and calculate compensation matrix, constantly repaired according to test result
Positive compensation matrix, to be modified to the colour cast phenomenon for shielding lower imaging system, especially with before mobile phone or other mobile devices
It sets camera be imaged under screen, suitable under the OLED screen curtain of flow line production and calibration scene and portable electronic device
The colour correction of imaging system.
In addition, imaging system colour correction side under the screen according to the above embodiment of the present invention based on screen transmitted spectrum
Method can also have following additional technical characteristic:
Further, in one embodiment of the invention, the step S1 further comprises: utilizing transmission-type spectrometer
The OLED screen curtain sample is measured, the transmittance graph under different wave length is obtained.
It further, in one embodiment of the invention, is bent by calculating the transmissivity in the step S2
Line obtains mean transmissivity, to determine the initial compensation matrix of the OLED screen curtain sample, wherein the initial compensation matrix
It is for tri- channels RGB.
Further, in one embodiment of the invention, the RGB of imaging system and institute under the screen after the pre-calibration
State the pre-calibration relationship between the RGB of OLED screen curtain sample are as follows:
Wherein, R, G, B indicate three channels of the OLED screen curtain sample, C0,3×3Indicate the initial compensation matrix, R0,
G0, B0Three channels of imaging system under screen after indicating the pre-calibration.
Further, in one embodiment of the invention, in the step S4, if using the standard color card as survey
Target is tried, then only needs to choose first three rows color blocks part and carries out data acquisition process.
In order to achieve the above objectives, another aspect of the present invention, which proposes, is imaged system under a kind of screen based on screen transmitted spectrum
System color calibration system, comprising: obtain the transmittance graph that module is used to obtain OLED screen curtain sample using spectrometer；Initialization
Module is used to determine the initial compensation matrix of the OLED screen curtain sample according to the transmittance graph；Pre-calibration module is for benefit
Pre-calibration is carried out to imaging system under screen with the initial compensation matrix；Test module is used for using under the screen after pre-calibration
Imaging system carries out test of taking pictures to standard color card, obtains the RGB triple channel test value of corresponding region in test result；Compare mould
Block is used to tri- lane testing values of RGB of the corresponding region being compared determining benefit with color standard value in the standard card
Repay matrix；Judgment module is used to calibrate imaging system under the screen using the compensation matrix, and to the standard
Colour atla carries out imaging test, judges whether there is colour cast phenomenon, then exports compensation result if it does not exist.
Imaging system color calibration system under the screen based on screen transmitted spectrum of the embodiment of the present invention, by utilizing light
The screen sample transmission spectrum of spectrometer acquisition simultaneously carries out pre-calibration to imaging system under screen according to spectrum, after recycling pre-calibration
System shooting test carried out to standard color card obtain average calibration value, and calculate compensation matrix, constantly repaired according to test result
Positive compensation matrix, to be modified to the colour cast phenomenon for shielding lower imaging system, especially with before mobile phone or other mobile devices
It sets camera be imaged under screen, suitable under the OLED screen curtain of flow line production and calibration scene and portable electronic device
The colour correction of imaging system.
In addition, imaging system colour correction system under the screen according to the above embodiment of the present invention based on screen transmitted spectrum
System can also have following additional technical characteristic:
Further, in one embodiment of the invention, the acquisition module further comprises: utilizing transmission-type spectrum
Instrument measures the OLED screen curtain sample, obtains the transmittance graph under different wave length.
It further, in one embodiment of the invention, is by calculating the transmission in the initialization module
Rate curve acquisition mean transmissivity, to determine the initial compensation matrix of the OLED screen curtain sample, wherein the initial compensation
Matrix is for tri- channels RGB.
Further, in one embodiment of the invention, the RGB of imaging system and institute under the screen after the pre-calibration
State the pre-calibration relationship between the RGB of OLED screen curtain sample are as follows:
Wherein, R, G, B indicate three channels of the OLED screen curtain sample, C0,3×3Indicate the initial compensation matrix, R0,
G0, B0Three channels of imaging system under screen after indicating the pre-calibration.
Further, in one embodiment of the invention, in the test module, if using the standard color card as
Target is tested, then only needs to choose first three rows color blocks part and carries out data acquisition process.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is according to imaging system color correcting method stream under the screen based on screen transmitted spectrum of the embodiment of the present invention
Cheng Tu；
Fig. 2 is to be had according to imaging system color correcting method under the screen based on screen transmitted spectrum of the embodiment of the present invention
Body flow chart；
Fig. 3 is the screen sample transmittance curve schematic diagram according to the embodiment of the present invention；
Fig. 4 is the color colour standard colour atla schematic diagram according to the embodiment of the present invention；
Fig. 5 is to correspond to rgb value according to part colours in the standard color card of the embodiment of the present invention；
Fig. 6 is according to imaging system color calibration system knot under the screen based on screen transmitted spectrum of the embodiment of the present invention
Structure schematic diagram.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
It describes that system is imaged under the screen based on screen transmitted spectrum proposed according to embodiments of the present invention with reference to the accompanying drawings
Unite color correcting method and system, describe to propose according to embodiments of the present invention first with reference to the accompanying drawings based on screen transmitted spectrum
Screen under imaging system color correcting method.
Fig. 1 be one embodiment of the invention the screen based on screen transmitted spectrum under imaging system color correcting method stream
Cheng Tu.
As shown in Figure 1, should under screen based on screen transmitted spectrum imaging system color correcting method the following steps are included:
In step sl, the transmittance graph of OLED screen curtain sample is obtained using spectrometer.
Further, step S1 is to be surveyed using transmission-type spectrometer to OLED screen curtain sample in the embodiment of the present invention
Amount obtains the transmittance graph under different wave length.Wherein, transmittance graph is alternatively referred to as transmission spectrum curve.
In step s 2, the initial compensation matrix of OLED screen curtain sample is determined according to transmittance graph.
That is, obtaining the color pre-calibration square for being directed to tri- channels RGB according to screen sample transmission spatial distribution
Battle array.
Further, step S2 is to obtain mean transmissivity by calculating transmittance graph in the embodiment of the present invention, is come true
Determine the initial compensation matrix of OLED screen curtain sample, wherein initial compensation matrix is for tri- channels RGB.
It is understood that the embodiment of the present invention carries out transmitted spectrum test to OLED screen curtain, and according in industrial standard
Transmitance under tri- wave bands of RGB determines pre-calibration matrix.
In step s3, pre-calibration is carried out to imaging system under screen using initial compensation matrix.
It is to be understood that carrying out pre-calibration to imaging system shooting image under screen using the pre-calibration matrix generated.
Wherein, the pre-calibration relationship under the screen after pre-calibration between the RGB of imaging system and the RGB of OLED screen curtain sample
Are as follows:
Wherein, R, G, B indicate three channels of OLED screen curtain sample, C0,3×3Indicate initial compensation matrix, R0, G0, B0Table
Three channels of imaging system under screen after showing pre-calibration.
In step s 4, test of taking pictures is carried out to standard color card using imaging system under the screen after pre-calibration, obtains and surveys
The RGB triple channel test value of corresponding region in test result.
Wherein, it if using standard color card as test target, only needs to choose first three rows color blocks part progress data and adopts
Collection processing.
It is compared using the rgb value of standard color card with the rgb value of test result after test, and is generated using difference
Correction matrix.
In step s 5, tri- lane testing values of RGB of corresponding region are compared with color standard value in standard card
Determine compensation matrix.
That is, obtaining compensation matrix according to the difference of each section regional standard rgb value and test value in standard color card.
In step s 6, imaging system under screen is calibrated using compensation matrix, and standard color card is imaged
Test, judges whether there is colour cast phenomenon, then repeats step S4-S6 if it exists and then exports compensation result if it does not exist.
To sum up, as shown in Fig. 2, the bearing calibration of the embodiment of the present invention are as follows: use be imaged under spectrometer test screen first
Screen sample transmission spectrum used in system；Initial compensation Matrix C is calculated according to projection spectrum is obtained0,3×3；Use initial compensation
After matrix carries out preliminary colour correction to imaging system under screen, the system photographs standard color card S after precorrection is utilized0,m×n, obtain
Obtain test value Ti,m×n；Correction-compensation matrix is calculated using the difference of the corresponding numerical value of Color Channel between test value and standard value
Ci,3×3；Standard color card is shot again, according to demand repeatedly correction course.
Embodiment one, by taking RGB as an example, the specific steps are as follows:
(1) screen used in imaging system under screen is measured using transmission-type spectrometer, is obtained under different wave length
Transmittance graph, and obtain bandwidth under three required imaging system operation wavelengths 700nm, 546.1nm and 435.8nm respectively and be
The mean transmissivity t of 10nmλ。
(2) initial color based on screen sample transmission spectrum is obtained by the mean transmissivity under obtained different wave length to mend
Repay Matrix C0,3×3, expression formula should be as follows:
(3) initial color compensation matrix C is utilized0,3×3Pre-calibration is carried out to imaging system under screen, then system is imaged under screen
Relationship after system pre-calibration between RGB and captured image RGB may be expressed as:
(4) standard color card S is shot using imaging system under screen0,m×n, obtain test value Ti,m×n, wherein m, n are respectively represented
Under screen in imaging system visual field various criterion test color lumps place line number and columns.With in the case of RGB to standard color card
For color lump distribution, S0,m×nIt is represented by following form.Wherein, if using standard color card as test target, before need to only choosing
Three row colour block portions point carry out data acquisition process.
(5) by T0,m×nThe value of RGB is obtained and is marked respectively compared with color standard value in standard color card in interior each color lump
RGB difference between quasi- value, and compensation matrix C is determined according to the average value of differencei,3×3。
(6) according to compensation matrix Ci,3×3Obtain imaging system rgb value under compensated screen are as follows:
According to actual needs, (4)-(6) step is repeated, until test value and standard of the imaging system to standard color card under screen
Colour atla numerical value is identical.
Embodiment two, by taking transparent top-illuminating OLED screen carries out the system color correcting method being imaged under screen as an example, tool
Steps are as follows for body:
(1) screen used in imaging system under screen is measured using transmission-type spectrometer, obtains wave as shown in Figure 3
Long and transmittance graph.Since in imaging system, RGB has corresponding wavelength.It is determined according to International Commission on Illumination in 1931
RGB three primary colours wavelength, R feux rouges reference wavelength are 700nm；G green light reference wavelength is 546.1nm；B blue light reference wavelength is
435.8nm, chooses above three wavelength and is characterized wavelength, obtains the mean transmissivity that bandwidth under three wavelength is 10nm respectively.
In embodiments of the present invention, blue light mean transmissivity is 41.15%, and green light mean transmissivity is 51.51%, and feux rouges averagely penetrates
Rate is 48.70%.It is respectively as follows: blue light 0.7989, green light 1, feux rouges 0.9454 by normalized transmitance.
(2) the initial color compensation matrix C based on screen sample transmission spectrum is obtained0,3×3, expression formula should be as follows:
(3) initial color compensation matrix C is utilized0,3×3To OLED display screen used in imaging system under screen in this example into
Row pre-calibration, then the pre-calibration relationship under screen after imaging system pre-calibration between RGB and captured image RGB may be expressed as:
(4) standard color card S as shown in Figure 4 is shot using imaging system under screen0,m×n, and obtain test value Ti,m×n,
Middle m, n respectively represent the place line number and columns of various criterion test color lumps in imaging system visual field under screen.
For in the case of RGB to the color lump distribution of standard color card, S0,m×nIt is represented by following form.Wherein, if to scheme
Standard color card shown in 4 then need to only choose first three rows colour block portion point and carry out data acquisition process as test target.
(5) by T0,m×nThe value of RGB is respectively compared with standard value shown in fig. 5 in interior each color lump, obtain with standard value it
Between RGB matrix of differences TΔ, and compensation matrix is determined according to the average value of difference
(6) according to compensation matrixObtain imaging system rgb value under compensated screen are as follows:
According to actual needs, (4)-(6) step is repeated, loop optimization is carried out, until meeting requirement.
Imaging system color correcting method under the screen based on screen transmitted spectrum proposed according to embodiments of the present invention leads to
It crosses the screen sample transmission spectrum obtained using spectrometer and pre-calibration is carried out to imaging system under screen according to spectrum, recycle
System after pre-calibration carries out shooting test to standard color card and obtains average calibration value, and calculates compensation matrix, is tied according to test
The continuous correction-compensation matrix of fruit, to be modified to the colour cast phenomenon for shielding lower imaging system, especially with mobile phone or other shiftings
Dynamic equipment front camera be imaged under screen, suitable for flow line production and calibration scene and portable electronic device
The colour correction of imaging system under OLED screen curtain.
System is imaged under the screen based on screen transmitted spectrum proposed according to embodiments of the present invention referring next to attached drawing description
System color calibration system.
Fig. 6 be one embodiment of the invention the screen based on screen transmitted spectrum under imaging system color calibration system.
As shown in fig. 6, being somebody's turn to do imaging system color calibration system 10 under the screen based on screen transmitted spectrum includes: acquisition mould
Block 100, initialization module 200, pre-calibration module 300, test module 400, comparison module 500 and judgment module 600.
Wherein, the transmittance graph that module 100 is used to obtain OLED screen curtain sample using spectrometer is obtained.Initialization module
200 for determining the initial compensation matrix of OLED screen curtain sample according to transmittance graph.Pre-calibration module 300 is used for using initial
Compensation matrix carries out pre-calibration to imaging system under screen.Test module 400 is used to utilize imaging system under the screen after pre-calibration
System carries out test of taking pictures to standard color card, obtains the RGB triple channel test value of corresponding region in test result.Comparison module 500
For tri- lane testing values of RGB of corresponding region to be compared determining compensation matrix with color standard value in standard card.Sentence
Disconnected module 600 carries out imaging test for calibrating using compensation matrix to imaging system under screen, and to standard color card, sentences
It is disconnected to whether there is colour cast phenomenon, compensation result is then exported if it does not exist.
It is understood that including: under spectrometer, reflective standard color card, screen in the system of the embodiment of the present invention
The components such as imaging system mould group under screen sample and screen used in imaging system.
Further, in one embodiment of the invention, obtaining module further comprises: utilizing transmission-type spectrometer pair
OLED screen curtain sample measures, and obtains the transmittance graph under different wave length.
It further, in one embodiment of the invention, in initialization module, is obtained by calculating transmittance graph
Average transmitance is taken, to determine the initial compensation matrix of OLED screen curtain sample, wherein initial compensation matrix is for RGB tri-
A channel.
Further, in one embodiment of the invention, under the screen after pre-calibration imaging system RGB and OLED screen
Pre-calibration relationship between the RGB of curtain sample are as follows:
Wherein, R, G, B indicate three channels of OLED screen curtain sample, C0,3×3Indicate initial compensation matrix, R0, G0, B0Table
Three channels of imaging system under screen after showing pre-calibration.
Further, in one embodiment of the invention, in test module, if using standard color card as test target
Mark then only needs to choose first three rows color blocks part and carries out data acquisition process.
It should be noted that aforementioned to imaging system color correcting method embodiment under the screen based on screen transmitted spectrum
Explanation be also applied for the system, details are not described herein again.
Imaging system color calibration system under the screen based on screen transmitted spectrum proposed according to embodiments of the present invention leads to
It crosses the screen sample transmission spectrum obtained using spectrometer and pre-calibration is carried out to imaging system under screen according to spectrum, recycle
System after pre-calibration carries out shooting test to standard color card and obtains average calibration value, and calculates compensation matrix, is tied according to test
The continuous correction-compensation matrix of fruit, to be modified to the colour cast phenomenon for shielding lower imaging system, especially with mobile phone or other shiftings
Dynamic equipment front camera be imaged under screen, suitable for flow line production and calibration scene and portable electronic device
The colour correction of imaging system under OLED screen curtain.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. imaging system color correcting method under a kind of screen based on screen transmitted spectrum, which is characterized in that including following step
It is rapid:
Step S1 obtains the transmittance graph of OLED screen curtain sample using spectrometer；
Step S2 determines the initial compensation matrix of the OLED screen curtain sample according to the transmittance graph；
Step S3 carries out pre-calibration to imaging system under screen using the initial compensation matrix；
Step S4 carries out test of taking pictures to standard color card using imaging system under the screen after pre-calibration, obtains in test result
The RGB triple channel test value of corresponding region；
Tri- lane testing values of RGB of the corresponding region are compared by step S5 with color standard value in the standard card
Determine compensation matrix；And
Step S6 calibrates imaging system under the screen using the compensation matrix, and carries out to the standard color card
Imaging test judges whether there is colour cast phenomenon, and then repeating said steps S4-S6 then exports compensation knot if it does not exist if it exists
Fruit.
2. imaging system color correcting method under the screen according to claim 1 based on screen transmitted spectrum, feature
It is, the step S1 further comprises:
The OLED screen curtain sample is measured using transmission-type spectrometer, obtains the transmittance graph under different wave length.
3. imaging system color correcting method under the screen according to claim 1 based on screen transmitted spectrum, feature
It is, is to obtain mean transmissivity by calculating the transmittance graph, to determine the OLED screen curtain in the step S2
The initial compensation matrix of sample, wherein the initial compensation matrix is for tri- channels RGB.
4. imaging system color correcting method under the screen according to claim 1 based on screen transmitted spectrum, feature
It is, the pre-calibration relationship under the screen after the pre-calibration between the RGB of imaging system and the RGB of the OLED screen curtain sample
Are as follows:
Wherein, R, G, B indicate three channels of the OLED screen curtain sample, C0,3×3Indicate the initial compensation matrix, R0, G0, B0
Three channels of imaging system under screen after indicating the pre-calibration.
5. imaging system color correcting method under the screen according to claim 1 based on screen transmitted spectrum, feature
It is, in the step S4, if only needing to choose first three rows color blocks part using the standard color card as test target
Carry out data acquisition process.
6. imaging system color calibration system under a kind of screen based on screen transmitted spectrum characterized by comprising
Module is obtained, for obtaining the transmittance graph of OLED screen curtain sample using spectrometer；
Initialization module, for determining the initial compensation matrix of the OLED screen curtain sample according to the transmittance graph；
Pre-calibration module, for carrying out pre-calibration to imaging system under screen using the initial compensation matrix；
Test module obtains test for carrying out test of taking pictures to standard color card using imaging system under the screen after pre-calibration
As a result the RGB triple channel test value of middle corresponding region；
Comparison module, for by color standard value in tri- lane testing values of RGB of the corresponding region and the standard card into
Row relatively determines compensation matrix；And
Judgment module, for being calibrated using the compensation matrix to imaging system under the screen, and to the reference colour
Card carries out imaging test, judges whether there is colour cast phenomenon, then exports compensation result if it does not exist.
7. imaging system color calibration system under the screen according to claim 6 based on screen transmitted spectrum, feature
It is, the acquisition module further comprises:
The OLED screen curtain sample is measured using transmission-type spectrometer, obtains the transmittance graph under different wave length.
8. imaging system color calibration system under the screen according to claim 6 based on screen transmitted spectrum, feature
It is, is to obtain mean transmissivity by calculating the transmittance graph, to determine the OLED in the initialization module
The initial compensation matrix of screen sample, wherein the initial compensation matrix is for tri- channels RGB.
9. imaging system color calibration system under the screen according to claim 6 based on screen transmitted spectrum, feature
It is, the pre-calibration relationship under the screen after the pre-calibration between the RGB of imaging system and the RGB of the OLED screen curtain sample
Are as follows:
Wherein, R, G, B indicate three channels of the OLED screen curtain sample, C0,3×3Indicate the initial compensation matrix, R0, G0, B0
Three channels of imaging system under screen after indicating the pre-calibration.
10. imaging system color calibration system under the screen according to claim 6 based on screen transmitted spectrum, feature
It is, in the test module, if only needing to choose first three rows color block portion using the standard color card as test target
Divide and carries out data acquisition process.
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