CN111458112B - Color coordinate measuring method, device, equipment and storage medium based on Gamma correction - Google Patents
Color coordinate measuring method, device, equipment and storage medium based on Gamma correction Download PDFInfo
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- 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
Abstract
The invention provides a color coordinate measuring method, a device, equipment and a storage medium based on Gamma correction, wherein the method comprises the following steps: acquiring color coordinates of a target position point of each test picture when a display panel to be tested obtained based on Gamma correction respectively displays N test pictures, wherein N is a positive integer greater than or equal to 3; acquiring a light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera; and obtaining the color coordinate of each position point in each test picture according to the color coordinate of the target position point of each test picture and the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera. According to the invention, the color coordinate of the display panel to be measured is measured by reasonably utilizing the product obtained by Gamma correction of the display panel to be measured, and the color coordinate of the display panel to be measured is directly measured without adding extra equipment.
Description
Technical Field
The invention relates to the technical field of displays, in particular to a color coordinate measuring method, device, equipment and storage medium based on Gamma correction.
Background
With the popularization of devices including display panels, such as mobile phones, computers, televisions, and the like, people have increasingly high requirements for display effects. For manufacturers of display panels, accurate evaluation of display characteristics of display panels is a necessary means for improving the quality of the display panels, and one of the important display characteristics is the accuracy of color display.
Currently, the method for evaluating the correctness of the color display of the display panel is as follows: and measuring the color coordinate value of the picture displayed by the display panel, comparing the color coordinate value with an ideal color coordinate value to obtain the deviation of the displayed color of the picture, and evaluating the accuracy of the color display of the display panel.
The scheme for measuring the color coordinate value of the picture displayed by the display panel generally comprises the following steps:
one is to load an XYZ filter in front of the camera lens, then take a picture displayed on the display panel, and obtain color coordinate values by calculation based on the taken picture.
The other is measurement through an integrated device which comprises a spectrometer, a color camera and a data processing end. The method specifically comprises the following steps: measuring by a spectrometer to obtain a spectrum of a central position point of a display panel on which a picture is displayed, and further obtaining a color coordinate value of the central position point; then measuring the rgb value of the displayed picture through a color camera; and then, calculating to obtain a conversion matrix T from the rgb value of the central position point to the color coordinate value, and finally obtaining the color coordinate value of the displayed picture by using the rgb value of the displayed picture and the conversion matrix T.
In the two schemes, the first scheme is to directly measure all color coordinate values of a displayed picture, and the second scheme is an integrated device, so that the color coordinate value of a central position point must be obtained by the device when the color coordinate value is obtained, that is, the existing measurement schemes all need to directly measure the color coordinate value of the picture displayed on the display panel by using a specific device, which results in the need of paying more hardware cost.
Disclosure of Invention
The invention mainly aims to provide a color coordinate measuring method, a device, equipment and a storage medium based on Gamma correction, aiming at solving the technical problem that the color coordinate value of a picture displayed on a display panel needs to be directly measured by a specific device in the prior art.
In a first aspect, the present invention provides a color coordinate measuring method based on Gamma correction, including:
acquiring color coordinates of a target position point of each test picture when a display panel to be tested respectively displays N test pictures, wherein the color coordinates of the target position point of each test picture are obtained by performing Gamma correction on the display panel to be tested, and N is a positive integer greater than or equal to 3;
acquiring a light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera;
and obtaining the color coordinate of each position point in each test picture according to the color coordinate of the target position point of each test picture and the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera.
Optionally, the step of obtaining the color coordinate of each position point in each test picture according to the color coordinate of the target position point of each test picture and the light intensity value of each position point in each test picture in each spectral channel of the multi-channel camera includes:
acquiring a light intensity value of a target position point of each test picture under each spectral channel of the multi-channel camera;
obtaining a conversion matrix from the light intensity value of the target position point to the color coordinate based on the light intensity value of the target position point of each test picture under each spectral channel of the multi-channel camera and the color coordinate of the target position point of each test picture;
and obtaining the color coordinate of each position point in each test picture according to the conversion matrix and the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera.
Optionally, when the step of obtaining the color coordinates of the target position point of each test picture when the display panel to be tested respectively displays N test pictures is performed, the method further includes:
acquiring and storing correction information sent by Gamma correction equipment, wherein the correction information comprises: the identification information of the corrected display panel, the color coordinates of the target position point of the test picture and the image parameters of the test picture when the corrected display panel displays the test picture.
Optionally, when the display panel to be tested respectively displays N test pictures, the step of obtaining the color coordinates of the target position point of each test picture includes:
when a test task is received, determining the identity identification information of a display panel to be tested corresponding to the test task;
acquiring target correction information from the stored correction information, wherein the target correction information comprises identity identification information of a corrected display panel and is consistent with the identity identification information of a display panel to be detected;
and acquiring the color coordinates of the target position point of each test picture when the display panel to be tested respectively displays N test pictures from the target correction information.
Optionally, the step of obtaining the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera includes:
acquiring image parameters of the N test pictures from the target correction information;
controlling the display panel to be tested to sequentially display the N test pictures according to the image parameters of the N test pictures respectively;
acquiring a color image corresponding to each test picture, which is obtained by shooting N test pictures respectively by a multi-channel camera;
and extracting and obtaining the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera based on each color image.
In a second aspect, the present invention also provides a Gamma correction-based color coordinate measuring apparatus, including:
the device comprises an acquisition module, a display module and a processing module, wherein the acquisition module is used for acquiring the color coordinate of a target position point of each test picture when the display panel to be tested respectively displays N test pictures, the color coordinate of the target position point of each test picture is obtained by performing Gamma correction on the display panel to be tested, and N is a positive integer greater than or equal to 3; acquiring a light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera;
and the measuring module is used for obtaining the color coordinate of each position point in each test picture according to the color coordinate of the target position point of each test picture and the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera.
In a third aspect, the present invention further provides a Gamma correction-based color coordinate measuring apparatus, which includes a processor, a memory, and a color coordinate measuring program stored on the memory and executable by the processor, wherein when the color coordinate measuring program is executed by the processor, the steps of the Gamma correction-based color coordinate measuring method as described above are implemented.
In a fourth aspect, the present invention further provides a storage medium storing a color coordinate measuring program, wherein the color coordinate measuring program, when executed by a processor, implements the steps of the color coordinate measuring method based on Gamma correction as described above.
In the invention, when a display panel to be tested respectively displays N test pictures, the color coordinate of a target position point of each test picture is obtained, wherein the color coordinate of the target position point of each test picture is obtained by performing Gamma correction on the display panel to be tested, and N is a positive integer greater than or equal to 3; acquiring a light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera; and obtaining the color coordinate of each position point in each test picture according to the color coordinate of the target position point of each test picture and the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera. According to the invention, the color coordinate of the display panel to be measured is measured by reasonably utilizing the product obtained by Gamma correction of the display panel to be measured, and the color coordinate of the display panel to be measured is directly measured without adding extra equipment.
Drawings
Fig. 1 is a schematic hardware configuration diagram of a Gamma correction-based color coordinate measuring apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating an embodiment of a Gamma correction-based color coordinate measuring method according to the present invention;
fig. 3 is a schematic diagram of functional modules of an embodiment of a Gamma correction-based color coordinate measuring apparatus according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In a first aspect, embodiments of the present invention provide a Gamma correction-based color coordinate measuring apparatus, which may be a Personal Computer (PC), a notebook computer, a server, or other apparatuses having a data processing function.
Referring to fig. 1, fig. 1 is a schematic diagram of a hardware structure of a Gamma correction-based color coordinate measuring apparatus according to an embodiment of the present invention. In this embodiment of the present invention, the apparatus for measuring color coordinates based on Gamma correction may include a processor 1001 (e.g., a Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used for realizing connection communication among the components; the user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard); the network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WI-FI interface, WI-FI interface); the memory 1005 may be a Random Access Memory (RAM) or a non-volatile memory (non-volatile memory), such as a magnetic disk memory, and the memory 1005 may optionally be a storage device independent of the processor 1001. Those skilled in the art will appreciate that the hardware configuration depicted in FIG. 1 is not intended to be limiting of the present invention, and may include more or less components than those shown, or some components in combination, or a different arrangement of components.
With continued reference to fig. 1, a memory 1005, which is one type of computer storage medium in fig. 1, may include an operating system, a network communication module, a user interface module, and a color coordinate measurement program therein. The processor 1001 may call a color coordinate measurement program stored in the memory 1005, and execute the color coordinate measurement method based on Gamma correction according to the embodiment of the present invention.
In a second aspect, an embodiment of the present invention provides a color coordinate measuring method based on Gamma correction.
Referring to fig. 2, fig. 2 is a schematic flow chart of an embodiment of a Gamma correction-based color coordinate measuring method according to the present invention. In one embodiment, the color coordinate measuring method based on Gamma correction includes:
step S10, acquiring color coordinates of a target position point of each test picture when the display panel to be tested respectively displays N test pictures, wherein the color coordinates of the target position point of each test picture are obtained by performing Gamma correction on the display panel to be tested, and N is a positive integer greater than or equal to 3;
the current display panel includes OLED, LCD, miniLED, micro led and other display technologies, and usually Gamma correction is required after the middle and front process is completed. This is because the various display panels generally display other various color pictures by pixels of three colors of RGB. For example, RGB are all lit, displaying white; RG is lighted up to display yellow; GB lights up, shows purple; RG lights up and displays cyan. By mixing RGB light of different intensities, control of various panel colors can be achieved. However, in the front-end process, 1: 1: a current of 1 does not drive a display 1: 1: 1, i.e., white light cannot be displayed. Even different panels, even driven with the same current, display different colors.
Gamma correction is carried out on the display panel, and correction (calibration) is carried out on the circuit drive of three channels of RGB. The final result is that the display panel can actually display a white picture when the target picture is a white picture. In the Gamma correction process of the display panel, Gamma correction is generally selected for a plurality of pictures, that is, the display panel displays different test pictures, so that the color coordinates of the target position point of each test picture are obtained when the display panel displays different test pictures. For example, when the display panel displays a test picture 1, the color coordinate 1 of the target position point of the test picture 1 is obtained; obtaining a color coordinate 2 of a target position point of the test picture 2 when the display panel displays the test picture 2; and when the display panel displays the test picture 3, obtaining the color coordinates 3 of the target position point of the test picture 3.
Based on the characteristic that the color coordinates of the target position point of each test picture can be obtained when the display panel displays different test pictures by performing Gamma correction on the display panel, in this embodiment, the execution main body of the color coordinate measurement method based on Gamma correction establishes communication connection with the device performing Gamma correction on the display panel, so that the color coordinates of the target position point of each test picture can be obtained directly from the device performing Gamma correction on the display panel to be tested when the display panel to be tested displays N test pictures respectively, and preferably, the N test pictures are R, G, B, W pictures or other appointed pictures respectively. And N is a positive integer greater than or equal to 3, namely when the display panel to be tested needs to be acquired to respectively display at least 3 test pictures, the color coordinates of the target position point of each test picture are acquired. For example, when the display panel to be tested displays a test picture 1, the color coordinate 1 of the target position point of the test picture 1 is obtained; when the display panel to be tested displays the test picture 2, testing the color coordinate 2 of the target position point of the picture 2; and acquiring the color coordinates 3 of the target position points of the test picture 3 when the display panel to be tested displays the test picture 3. Each test picture can be self-defined in the Gamma correction stage according to actual needs, for example, the test picture 1 is a red picture. The target location point can also be customized according to actual needs, for example, the central point is used as the target location point.
Step S20, acquiring a light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera;
in this embodiment, if the color coordinates 1 of the target position point of the test picture 1, the color coordinates 2 of the target position point of the test picture 2, and the color coordinates 3 of the target position point of the test picture 3 are obtained. Correspondingly, when the display panel to be tested needs to display the test picture 1, the test picture 2 and the test picture 3, the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera is obtained.
The specific scheme is as follows: the method comprises the steps of controlling a display panel to be tested to sequentially display a test picture 1, a test picture 2 and a test picture 3, simultaneously controlling a multi-channel camera to respectively shoot each test picture, so that a color image corresponding to each test picture can be obtained, and then extracting and obtaining the light intensity value of each position point in each color image under each spectral channel of the multi-channel camera based on the existing extraction program (the specific program code is the existing code, and the description is not repeated herein), so that the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera is obtained. The multi-channel camera may be a part of an execution main body of the color coordinate measurement method based on Gamma correction, or may be an external multi-channel camera of the execution main body.
And step S30, obtaining the color coordinate of each position point in each test picture according to the color coordinate of the target position point of each test picture and the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera.
In this embodiment, a conversion matrix from the light intensity value to the color coordinate may be obtained according to the color coordinate of the target position point of each test picture and the light intensity value of each position point in each test picture in each spectral channel of the multi-channel camera, and then the light intensity value of each position point in each test picture in each spectral channel of the multi-channel camera is multiplied by the conversion matrix, so as to obtain the color coordinate of each position point in each test picture.
In this embodiment, when the display panel to be tested respectively displays N test pictures, the color coordinate of the target position point of each test picture is obtained, where the color coordinate of the target position point of each test picture is obtained by performing Gamma correction on the display panel to be tested, and N is a positive integer greater than or equal to 3; acquiring a light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera; and obtaining the color coordinate of each position point in each test picture according to the color coordinate of the target position point of each test picture and the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera. Through this embodiment, the rational utilization carries out the product that Gamma corrected and obtained to the display panel that awaits measuring, has realized measuring the color coordinates of the display panel that awaits measuring, and need not to increase the direct color coordinates of measuring the display panel that awaits measuring of extra equipment.
Further, in one embodiment, step S30 includes:
step S301, acquiring a light intensity value of a target position point of each test picture under each spectral channel of the multi-channel camera;
in this embodiment, taking obtaining the test picture 1 as an example, based on the light intensity value of each position point in the obtained test picture 1 in each spectral channel of the multi-channel camera, the light intensity value of the target position point of the test picture 1 in each spectral channel of the multi-channel camera is easily obtained. Similarly, the light intensity values of the target position points of other test pictures in each spectral channel of the multi-channel camera can be obtained in the same manner.
Step S302, obtaining a conversion matrix from the light intensity value of each target position point to the color coordinate based on the light intensity value of the target position point of each test picture under each spectral channel of the multi-channel camera and the color coordinate of the target position point of each test picture;
in this embodiment, the multi-channel camera is selected according to actual needs, and is not limited herein. Optionally, if the multi-channel camera is an RGB camera, the light intensity value of the target position point of the test picture 1 in each spectral channel of the multi-channel camera may be set as
Color coordinates of the target position point of the test picture 1 are
(ii) a Let the light intensity value of the target position point of the test picture 2 under each spectral channel of the multi-channel camera be
The color coordinates of the target position point of the test picture 2 are
(ii) a Let the light intensity value of the target position point of the test picture 3 under each spectral channel of the multi-channel camera be
The color coordinates of the target position point of the test picture 3 are
(ii) a Setting the conversion matrix from the light intensity value to the color coordinate as
Then, there are:
wherein a1, a2, a3, b1, b2, b3, c1, c2 and c3 are unknown numbers, other parameters are known numbers, and the values of a1, a2, a3, b1, b2, b3, c1, c2 and c3 can be obtained by combining the three equations, so that the conversion matrix from the light intensity value to the color coordinate is obtained. It is easy to understand that when the multi-channel camera is other, the manner of obtaining the transformation matrix is the same as the principle of the above embodiment, and is not described herein again.
Step S303, obtaining the color coordinate of each position point in each test picture according to the conversion matrix and the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera.
In this embodiment, after obtaining the conversion matrix from the light intensity value to the color coordinate, the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera is multiplied by the conversion matrix, so as to obtain the color coordinate of each position point in each test picture.
Further, in an embodiment, before step S10, the method further includes:
acquiring and storing correction information sent by Gamma correction equipment, wherein the correction information comprises: the identification information of the corrected display panel, the color coordinates of the target position point of the test picture and the image parameters of the test picture when the corrected display panel displays the test picture.
In this embodiment, an execution main body of the color coordinate measurement method based on Gamma correction establishes communication connection with a device (i.e., Gamma correction device) that performs Gamma correction on a display panel, the Gamma correction device sends correction information each time the Gamma correction is performed on the display panel, and the execution main body stores the correction information in a memory after receiving the correction information. Wherein the correction information includes: and when the identity identification information of the corrected display panel and the corrected display panel display the test picture, the color coordinates of the target position point of the test picture and the image parameters of the test picture are obtained. The identification information may be a unique machine identification code of the tested display panel, and the image parameters at least include resolution, size, and color of the test picture. For example, the correction information 1 is: identification information 1, image parameters 1, 2, 3, 4, color coordinates 1, 2, 3, 4. Wherein, the color coordinate 1 is the color coordinate of the target position point of the test picture 1 when the corrected display panel 1 corresponding to the identification information 1 displays the test picture 1 corresponding to the image parameter 1; similarly, the color coordinate 2 is the color coordinate of the target location point of the test picture 2 when the corrected display panel 1 corresponding to the identification information 1 displays the test picture 2 corresponding to the image parameter 2, and so on. The correction information 2 is: identification information 2, image parameters 1, 2, 3, 4, color coordinates 5, 6, 7, 8. The color coordinate 5 is a color coordinate of a target position point of the test picture 2 when the corrected display panel 2 corresponding to the identification information 2 displays the test picture 1 corresponding to the image parameter 1, and so on.
In this embodiment, data obtained by performing a Gamma correction process on the display panel is stored for subsequent use.
Further, in one embodiment, step S10 includes:
step S101, when a test task is received, identity identification information of a display panel to be tested corresponding to the test task is determined;
in this embodiment, the identification information of the display panel to be tested is recorded in the test task, and when the test task is received, the identification information of the display panel to be tested can be obtained.
Step S102, acquiring target correction information from the stored correction information, wherein the target correction information comprises identity identification information of a corrected display panel and is consistent with the identity identification information of a display panel to be detected;
in this embodiment, target correction information is acquired from stored correction information, and the target correction information needs to satisfy the following conditions:
the target correction information comprises identity identification information of the corrected display panel, the identity identification information is consistent with the identity identification information of the display panel to be detected, the target correction information comprises image parameters of M test pictures, and the color coordinates of the target position point of each test picture when the corrected display panel respectively displays the M test pictures, wherein M is a positive integer greater than or equal to N.
For example, the identification information of the display panel to be tested corresponding to the test task is identification information 1, and the value of N is 3 or 4, and if the stored correction information includes the correction information 1 as described in the above embodiment, the target correction information is correction information 1.
Step S103, acquiring color coordinates of target position points of each test picture when the display panel to be tested respectively displays N test pictures from the target correction information.
In this embodiment, when the target correction information is correction information 1, and when 4 test pictures are respectively displayed on the display panel 1 (the display panel corresponding to the identification information 1) in the target correction information, the color coordinate of the target position point of each test picture is selected, and if the value of N is 3, 3 color coordinates are selected from the color coordinates. For example, the selected 3 color coordinates are color coordinates 1, 2, and 3, that is, when the display panel 1 displays 3 test pictures (test pictures 1, 2, and 3) respectively, the color coordinate of the target position point of each test picture is obtained from the target correction information, and the display panel to be tested, that is, the display panel 1, is the color coordinate of the target position point of each test picture when the display panel to be tested displays 3 test pictures (test pictures 1, 2, and 3) respectively.
In this embodiment, when the stored correction information is used to obtain the color coordinates of the target position point of each test picture when the display panel to be tested respectively displays N test pictures, the color coordinates of the display panel to be tested are directly measured without adding additional equipment, so that the existing data is reasonably utilized.
Further, in one embodiment, step S20 includes:
step S201, acquiring image parameters of the N test pictures from the target correction information;
in this embodiment, if it is acquired from the target correction information that the display panel 1 displays 3 test pictures (test pictures 1, 2, and 3), the color coordinates of the target position point of each test picture are acquired, and the image parameters of the 3 test pictures are acquired. Namely, the image parameters 1 of the test picture 1, the image parameters 2 of the test picture 2 and the image parameters 3 of the test picture 3 are obtained.
Step S202, controlling the display panel to be tested to sequentially display N test pictures according to the image parameters of the N test pictures respectively;
in this embodiment, after obtaining the image parameter 1 of the test picture 1, the image parameter 2 of the test picture 2, and the image parameter 3 of the test picture 3, the display panel to be tested may be controlled to sequentially display the corresponding test pictures 1, 2, and 3 according to the image parameters 1, 2, and 3, respectively.
Step S203, acquiring a color image corresponding to each test picture obtained by shooting N test pictures respectively by a multi-channel camera;
in this embodiment, the display panel to be tested sequentially displays the test pictures 1, 2, and 3, and the multi-channel camera is controlled to respectively shoot the displayed test pictures 1, 2, and 3, so as to obtain a color image corresponding to each test picture. Wherein, the multi-channel camera can be an RGB three-channel camera or other N (N > 3) channel cameras.
And step S204, extracting and obtaining the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera based on each color image.
In this embodiment, based on the existing extraction program (the specific program code is an existing code, which is not described herein), the light intensity value of each position point in each color image in each spectral channel of the multi-channel camera is obtained by extraction, that is, the light intensity value of each position point in each test picture in each spectral channel of the multi-channel camera is obtained. If the color image is shot by an RGB three-channel camera, the light intensity value of each position point in each test picture under an RGB spectral channel can be extracted; if the color image is obtained by shooting by other N (N > 3) channel cameras, the light intensity values of each position point in each test picture under N spectral channels of the N channel camera can be extracted and obtained.
In a third aspect, an embodiment of the present invention further provides a color coordinate measuring apparatus based on Gamma correction.
Referring to fig. 3, fig. 3 is a schematic diagram of functional modules of an embodiment of a Gamma correction-based color coordinate measuring apparatus according to the present invention.
In this embodiment, the color coordinate measuring apparatus based on Gamma correction includes:
the acquisition module 10 is configured to acquire a color coordinate of a target position point of each test picture when the display panel to be tested displays N test pictures, respectively, where the color coordinate of the target position point of each test picture is obtained by performing Gamma correction on the display panel to be tested, and N is a positive integer greater than or equal to 3; acquiring a light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera;
and the measuring module 20 is configured to obtain the color coordinate of each position point in each test picture according to the color coordinate of the target position point in each test picture and the light intensity value of each position point in each test picture in each spectral channel of the multi-channel camera.
Further, in an embodiment, the measurement module 20 is further configured to:
acquiring a light intensity value of a target position point of each test picture under each spectral channel of the multi-channel camera;
obtaining a conversion matrix from the light intensity value of the target position point to the color coordinate based on the light intensity value of the target position point of each test picture under each spectral channel of the multi-channel camera and the color coordinate of the target position point of each test picture;
and obtaining the color coordinate of each position point in each test picture according to the conversion matrix and the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera.
Further, in an embodiment, the device for measuring color coordinates based on Gamma correction further includes:
the storage module is used for acquiring and storing correction information sent by Gamma correction equipment, and the correction information comprises: the identification information of the corrected display panel, the color coordinates of the target position point of the test picture and the image parameters of the test picture when the corrected display panel displays the test picture.
Further, in an embodiment, the obtaining module 10 is further configured to:
when a test task is received, determining the identity identification information of a display panel to be tested corresponding to the test task;
acquiring target correction information from the stored correction information, wherein the target correction information comprises identity identification information of a corrected display panel and is consistent with the identity identification information of a display panel to be detected;
and acquiring the color coordinates of the target position point of each test picture when the display panel to be tested respectively displays N test pictures from the target correction information.
Further, in an embodiment, the obtaining module 10 is further configured to:
acquiring image parameters of the N test pictures from the target correction information;
controlling the display panel to be tested to sequentially display the N test pictures according to the image parameters of the N test pictures respectively;
acquiring a color image corresponding to each test picture, which is obtained by shooting N test pictures respectively by a multi-channel camera;
and extracting and obtaining the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera based on each color image.
The function implementation of each module in the Gamma correction-based color coordinate measuring device corresponds to each step in the Gamma correction-based color coordinate measuring method embodiment, and the function and implementation process thereof are not described in detail herein.
In a fourth aspect, an embodiment of the present invention further provides a storage medium.
The storage medium of the present invention stores a color coordinate measuring program, wherein the color coordinate measuring program, when executed by a processor, implements the steps of the above-described Gamma correction-based color coordinate measuring method. The storage medium is a computer-readable storage medium.
The method for implementing the color coordinate measuring program when executed may refer to various embodiments of the color coordinate measuring method based on Gamma correction of the present invention, and will not be described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for causing a terminal device to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A color coordinate measuring method based on Gamma correction, the color coordinate measuring method comprising:
acquiring color coordinates of a target position point of each test picture when a display panel to be tested respectively displays N test pictures, wherein the color coordinates of the target position point of each test picture are obtained by performing Gamma correction on the display panel to be tested, and N is a positive integer greater than or equal to 3;
acquiring a light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera;
and obtaining the color coordinate of each position point in each test picture according to the color coordinate of the target position point of each test picture and the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera.
2. The Gamma correction-based color coordinate measuring method of claim 1, wherein the step of obtaining the color coordinate of each position point in each test picture according to the color coordinate of the target position point in each test picture and the light intensity value of each position point in each test picture in each spectral channel of the multi-channel camera comprises:
acquiring a light intensity value of a target position point of each test picture under each spectral channel of the multi-channel camera;
obtaining a conversion matrix from the light intensity value of the target position point to the color coordinate based on the light intensity value of the target position point of each test picture under each spectral channel of the multi-channel camera and the color coordinate of the target position point of each test picture;
and obtaining the color coordinate of each position point in each test picture according to the conversion matrix and the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera.
3. The method for measuring color coordinates based on Gamma correction according to claim 1, wherein before the step of obtaining the color coordinates of the target position point of each test picture when the display panel to be tested respectively displays N test pictures, the method further comprises:
acquiring and storing correction information sent by Gamma correction equipment, wherein the correction information comprises: the identification information of the corrected display panel, the color coordinates of the target position point of the test picture and the image parameters of the test picture when the corrected display panel displays the test picture.
4. The Gamma correction-based color coordinate measuring method of claim 3, wherein the step of obtaining the color coordinates of the target location point of each test picture when the display panel to be tested respectively displays N test pictures comprises:
when a test task is received, determining the identity identification information of a display panel to be tested corresponding to the test task;
acquiring target correction information from the stored correction information, wherein the target correction information comprises identity identification information of a corrected display panel and is consistent with the identity identification information of a display panel to be detected;
and acquiring the color coordinates of the target position point of each test picture when the display panel to be tested respectively displays N test pictures from the target correction information.
5. The Gamma correction-based color coordinate measurement method of claim 4, wherein the step of obtaining the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera comprises:
acquiring image parameters of the N test pictures from the target correction information;
controlling the display panel to be tested to sequentially display the N test pictures according to the image parameters of the N test pictures respectively;
acquiring a color image corresponding to each test picture, which is obtained by shooting N test pictures respectively by a multi-channel camera;
and extracting and obtaining the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera based on each color image.
6. A Gamma correction-based color coordinate measuring apparatus, comprising:
the device comprises an acquisition module, a display module and a processing module, wherein the acquisition module is used for acquiring the color coordinate of a target position point of each test picture when the display panel to be tested respectively displays N test pictures, the color coordinate of the target position point of each test picture is obtained by performing Gamma correction on the display panel to be tested, and N is a positive integer greater than or equal to 3; acquiring a light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera;
and the measuring module is used for obtaining the color coordinate of each position point in each test picture according to the color coordinate of the target position point of each test picture and the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera.
7. The Gamma correction-based color coordinate measurement device of claim 6, wherein the measurement module is further configured to:
acquiring a light intensity value of a target position point of each test picture under each spectral channel of the multi-channel camera;
obtaining a conversion matrix from the light intensity value of the target position point to the color coordinate based on the light intensity value of the target position point of each test picture under each spectral channel of the multi-channel camera and the color coordinate of the target position point of each test picture;
and obtaining the color coordinate of each position point in each test picture according to the conversion matrix and the light intensity value of each position point in each test picture under each spectral channel of the multi-channel camera.
8. The Gamma correction-based color coordinate measurement device of claim 6, wherein the Gamma correction-based color coordinate measurement device further comprises:
the storage module is used for acquiring and storing correction information sent by Gamma correction equipment, and the correction information comprises: the identification information of the corrected display panel, the color coordinates of the target position point of the test picture and the image parameters of the test picture when the corrected display panel displays the test picture.
9. A Gamma correction-based color coordinate measuring apparatus comprising a processor, a memory, and a color coordinate measuring program stored on the memory and executable by the processor, wherein the color coordinate measuring program when executed by the processor implements the steps of the Gamma correction-based color coordinate measuring method according to any one of claims 1 to 5.
10. A storage medium on which a colored coordinate measurement program is stored, wherein the colored coordinate measurement program, when executed by a processor, implements the steps of the Gamma correction-based color coordinate measurement method according to any one of claims 1 to 5.
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| TWI336587B (en) * | 2007-06-12 | 2011-01-21 | Etron Technology Inc | Color calibrating method for setting target gamma curves of target display device |
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