CN114222116A - Crosstalk measuring method and device - Google Patents

Crosstalk measuring method and device Download PDF

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CN114222116A
CN114222116A CN202111521218.8A CN202111521218A CN114222116A CN 114222116 A CN114222116 A CN 114222116A CN 202111521218 A CN202111521218 A CN 202111521218A CN 114222116 A CN114222116 A CN 114222116A
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color
display device
stereoscopic display
tristimulus value
crosstalk
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邵海兵
张晶
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
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Abstract

The application provides a crosstalk measurement method and a crosstalk measurement device, wherein the crosstalk measurement method comprises the steps of controlling a to-be-measured three-dimensional display device to display a preset plane color image, wherein the preset plane color image comprises N viewpoint picture groups, each viewpoint picture group comprises N viewpoint pictures, the Mth viewpoint picture in the Mth viewpoint picture group correspondingly displays a first color, and other viewpoint pictures correspondingly display a second color, wherein M is greater than or equal to 1, M is less than or equal to N, and N is a positive integer greater than or equal to 2; acquiring tristimulus values of mixed colors generated by mixing a first color and a second color according to each stereoscopic viewpoint image imaged by the stereoscopic display device to be tested at a position spaced from the stereoscopic display device to be tested by a preset distance; and obtaining a reference tristimulus value of the first color and a reference tristimulus value of the second color, and determining the crosstalk value of the to-be-tested stereoscopic display device according to the tristimulus value of the mixed color, the reference tristimulus value of the first color and the reference tristimulus value of the second color.

Description

Crosstalk measuring method and device
Technical Field
The present application relates to the field of display technologies, and in particular, to a crosstalk measurement method and a crosstalk measurement apparatus.
Background
The projection three-dimensional display technology is one of naked eye three-dimensional display technologies, is different from a contact naked eye three-dimensional display technology, is restricted by the development of a liquid crystal panel technology, cannot realize large-screen three-dimensional display in the true sense at present, has the characteristic of better open adjustment compared with the contact three-dimensional display technology, and is more suitable for theoretical analysis in a research stage.
The quality of the projection three-dimensional display effect depends on whether the left eye and the right eye can respectively see the corresponding views, if the images in the three-dimensional visual area have serious mutual crosstalk, the eyes cannot receive the images of the corresponding viewpoints, and the human brain cannot perform three-dimensional fusion. Therefore, in projecting three-dimensional displays, crosstalk is an important parameter for evaluating the quality of stereoscopic images.
The traditional method is to use a brightness sensor to measure the brightness distribution around the naked eye three-dimensional display, and use the relative value of the brightness to represent the crosstalk characteristics of the naked eye three-dimensional display, for example, a crosstalk test method is described in naked eye stereoscopic television image quality test method-SJ/T11646-2016, and viewpoint information is converted into brightness which can be actually measured to realize the crosstalk test; however, in the above-mentioned test scheme, since the brightness is greatly influenced by the environment, distance, viewing angle, etc., it is relatively unstable, and the measurement scheme needs to measure the brightness distribution of all the viewpoints before performing crosstalk calculation, and when the number of viewpoints of the display device to be measured is too many, the crosstalk measurement becomes very complicated.
Disclosure of Invention
The embodiment of the application provides a crosstalk measurement method and a crosstalk measurement device, which are used for simplifying the steps of the conventional crosstalk measurement method.
In order to solve the above problem, the technical solution provided by the embodiment of the present application is as follows:
a crosstalk measurement method, comprising the steps of:
controlling a to-be-detected three-dimensional display device to display a preset planar color image, wherein the preset planar color image comprises N viewpoint picture groups, each viewpoint picture group comprises N viewpoint pictures, the Mth viewpoint picture in the Mth viewpoint picture group correspondingly displays a first color, and other viewpoint pictures correspondingly display a second color, wherein M is greater than or equal to 1, M is less than or equal to N, and N is a positive integer greater than or equal to 2;
at a position separated from the stereoscopic display device to be detected by a preset distance, acquiring tristimulus values of mixed colors generated by mixing the first color and the second color according to each stereoscopic viewpoint image imaged by the stereoscopic display device to be detected;
and acquiring a reference tristimulus value of the first color and a reference tristimulus value of the second color, and determining the crosstalk value of the to-be-tested stereoscopic display device according to the tristimulus value of the mixed color, the reference tristimulus value of the first color and the reference tristimulus value of the second color.
In the method for measuring crosstalk provided in this embodiment, the step of obtaining the reference tristimulus value of the first color and the reference tristimulus value of the second color, and determining the crosstalk value of the stereoscopic display device to be measured according to the tristimulus value of the mixed color, the reference tristimulus value of the first color, and the reference tristimulus value of the second color includes:
acquiring a first pure color image displayed by the stereoscopic display device to be detected at a position separated from the stereoscopic display device to be detected by the preset distance, wherein the first pure color image displays the first color;
acquiring a reference tristimulus value of the first color according to the first pure color image;
acquiring a second pure color image displayed by the stereoscopic display device to be detected at a position separated from the stereoscopic display device to be detected by the preset distance, wherein the first pure color image displays the second color;
acquiring a reference tristimulus value of the second color according to the second pure color image;
and determining the crosstalk value of the to-be-tested stereoscopic display device according to the tristimulus value of the mixed color, the reference tristimulus value of the first color and the reference tristimulus value of the second color.
In the crosstalk measurement method provided in this embodiment, a colorimeter is used to obtain the first pure color image and the second pure color image at a position spaced from the stereoscopic display device to be measured by the preset distance.
Acquiring a reference tristimulus value of the first color according to the first pure color image by using the colorimeter;
and acquiring a reference tristimulus value of the second color according to the second pure color image by using the colorimeter.
In the crosstalk measurement method provided in this embodiment, the step of determining the crosstalk value of the stereoscopic display device to be measured according to the tristimulus value of the mixed color, the reference tristimulus value of the first color, and the reference tristimulus value of the second color includes:
calculating the crosstalk value of the to-be-measured stereoscopic display device at the preset distance according to the following relational expression (1), relational expression (2) and relational expression (3):
Figure BDA0003407489270000031
Figure BDA0003407489270000032
Figure BDA0003407489270000033
wherein X is the X stimulus amount of the mixed color, Y is the Y stimulus amount of the mixed color, and Z is the Z stimulus amount of the mixed color; xi is the X stimulus amount of the first color, Yi is the Y stimulus amount of the first color, and Zi is the Z stimulus amount of the first color; xj is the X stimulation amount of the second color, Yj is the Y stimulation amount of the second color, and Zj is the Z stimulation amount of the second color; i is the attenuation coefficient of the first color; j is the attenuation coefficient of the second color;
the crosstalk value of the to-be-tested three-dimensional display device is an average value of the sum of i/j in the relational expression (1), the relational expression (2) and the relational expression (3).
The crosstalk measurement method provided in this embodiment is heavy, and before the step of controlling the stereoscopic display device to be tested to display a preset planar color image, the method further includes:
determining the preset distance according to imaging parameters of the stereoscopic display device to be detected, wherein the stereoscopic display device to be detected comprises a grating board and a display panel which are arranged oppositely, the display panel comprises a plurality of sub-pixels, the imaging parameters of the stereoscopic display device to be detected comprise a distance T between adjacent viewpoints, a distance D between the grating board and the display panel and a width W of any one of the sub-pixels, and the preset distance L is calculated according to the following relation (4):
Figure BDA0003407489270000034
the crosstalk measurement method provided in this embodiment is heavy, and the step of obtaining, at a position spaced from the stereoscopic display device to be measured by a preset distance, a tristimulus value of a mixed color generated by mixing the first color and the second color according to each stereoscopic viewpoint image imaged by the stereoscopic display device to be measured includes:
and detecting tristimulus values of the mixed color generated by mixing the first color and the second color in each stereoscopic viewpoint picture at a position separated from the stereoscopic display device to be detected by the preset distance by using a colorimeter.
The crosstalk measurement method provided in this embodiment is heavy, and the step of detecting, by using a colorimeter, a tristimulus value of the mixed color generated by mixing the first color and the second color in each stereoscopic viewpoint map at a position spaced from the stereoscopic display device to be measured by the preset distance includes:
determining a detection range in a plane which is separated from the stereoscopic display device to be detected by the preset distance according to the position of the first color in each stereoscopic view diagram;
setting the colorimeter within the detection range to determine tristimulus values of the mixed color resulting from mixing the first color and the second color.
The crosstalk measurement method provided in this embodiment is heavy, and the step of obtaining, at a position spaced from the stereoscopic display device to be measured by a preset distance, a tristimulus value of a mixed color generated by mixing the first color and the second color according to each stereoscopic viewpoint image imaged by the stereoscopic display device to be measured includes:
receiving the projection images of the stereoscopic view images displayed by the stereoscopic display device to be detected by using a receiving plate, wherein the distance between the receiving plate and the stereoscopic display device to be detected is the preset distance;
and acquiring the projection image by adopting an imaging spectrometer, and determining the tristimulus value of the mixed color generated by mixing the first color and the second color according to the projection image.
The crosstalk measurement method provided by this embodiment is heavy, and the stereoscopic display device to be measured is placed in a dark room to perform crosstalk measurement.
The embodiment of the application provides a crosstalk measurement apparatus, including:
a control module: the device comprises a control module, a display module and a display module, wherein the control module is used for controlling a to-be-detected three-dimensional display device to display a preset planar color image, the preset planar color image comprises N viewpoint picture groups, each viewpoint picture group comprises N viewpoint pictures, the Mth viewpoint picture in the Mth viewpoint picture group correspondingly displays a first color, and other viewpoint pictures correspondingly display a second color, wherein M is greater than or equal to 1, M is less than or equal to N, and N is a positive integer greater than or equal to 2;
the data conversion module: a preset distance is reserved between the three-dimensional display device to be detected, and the tristimulus values of the mixed color generated by mixing the first color and the second color are obtained according to each three-dimensional viewpoint image imaged by the three-dimensional display device to be detected;
a data processing module: and the crosstalk value of the to-be-tested stereoscopic display device is determined according to the tristimulus value of the mixed color, the reference tristimulus value of the first color and the reference tristimulus value of the second color.
The beneficial effects of the embodiment of the application are as follows: the embodiment of the application provides a crosstalk measurement method and a crosstalk measurement device, and compared with a conventional crosstalk measurement method in which a crosstalk characteristic of a display device is represented by a relative value of brightness, the embodiment of the application controls a to-be-measured stereoscopic display device to display a preset planar color image, the preset planar color image comprises N viewpoint picture groups, each viewpoint picture group comprises N viewpoint pictures, an mth viewpoint picture in the mth viewpoint picture group correspondingly displays a first color, and other viewpoint pictures correspondingly display a second color, wherein M is greater than or equal to 1 and less than or equal to N, N is a positive integer greater than or equal to 2, and a reference tristimulus value of the first color, a reference tristimulus value of the second color and a tristimulus value of the mixed color are obtained according to the tristimulus values of the mixed color, And the crosstalk value of the to-be-measured three-dimensional display device is determined by the reference tri-stimulus value of the first color and the reference tri-stimulus value of the second color, so that the steps of the crosstalk measurement method are simplified.
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The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a conventional crosstalk measurement apparatus;
fig. 2 is a plan view of a test chart displayed by a conventional display device to be tested and a perspective view obtained at a predetermined distance;
FIG. 3 is a graph showing brightness distribution of various views in a test chart displayed by a conventional display device under test;
fig. 4 is a flowchart of a crosstalk measurement method provided in an embodiment of the present application;
fig. 5 is a plan view of a test chart displayed by a display device to be tested according to an embodiment of the present disclosure and a perspective view obtained at a preset distance;
fig. 6 is a first schematic diagram of a crosstalk measuring apparatus according to an embodiment of the present application;
fig. 7 is a second schematic diagram of a crosstalk measuring apparatus according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a to-be-tested stereoscopic display device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
In the grating three-dimensional display, if crosstalk is small, human eyes can ignore the crosstalk, but when the number of viewpoints is increased, the viewpoint distance is reduced, or the slit light transmission width is increased, the waveform is widened, the waveform overlap is increased, the crosstalk is correspondingly increased, and a viewer can see obvious double images to influence the viewing experience, so that the crosstalk is an important parameter for evaluating the quality of a three-dimensional image in the grating three-dimensional display.
Please refer to fig. 1, fig. 2 and fig. 3; fig. 1 is a schematic diagram of a conventional crosstalk measuring apparatus; FIG. 2 is a plan view and a perspective view of a test chart displayed by a conventional display device under test; fig. 3 is a graph showing the luminance distribution of each view in a test chart displayed by a conventional display device under test.
The existing crosstalk measurement method is to use a brightness sensor to measure the brightness distribution around a naked eye three-dimensional display, and to use the relative value of brightness to represent the crosstalk characteristics of the naked eye three-dimensional display, for example, a crosstalk test method is described in "naked eye stereoscopic television image quality test method-SJ/T11646-2016", and includes the following steps:
step 1: providing a display device 10 to be tested, wherein the display device 10 to be tested displays a test chart, the test chart comprises N viewpoint images, in the X viewpoint image, the sub-pixel corresponding to the X viewpoint displays white, and the sub-pixels corresponding to other viewpoints display black, wherein N is a positive integer greater than or equal to 2, and X is less than or equal to N;
step 2: testing the white light brightness distribution curve chart of each test chart and finding out a main lobe angle;
and step 3: setting the test chart as a full black picture, horizontally rotating the colorimeter 20 around a screen by taking the center of the screen as a circle center and a preset distance L1 as a radius, and testing the brightness, wherein the measurement angle interval is preferably not more than 1 degree, and the angle range is recommended to be 45 degrees;
and 4, step 4: obtaining a brightness distribution curve chart of each view according to the test result;
and 5: the test and calculation results are recorded in table 1, and then the ratio of the luminance is calculated according to the formula (1) to obtain the crosstalk value:
Figure BDA0003407489270000071
Figure BDA0003407489270000072
TABLE 1
As can be seen from the above, in the existing crosstalk measurement method, the viewpoint information is converted into brightness that can be actually measured; however, in the above-mentioned test scheme, since the brightness is greatly influenced by the environment, distance, viewing angle, etc., it is relatively unstable, and the measurement scheme needs to measure the brightness distribution of all the viewpoints before performing crosstalk calculation, and when the number of viewpoints of the display device to be measured is too many, the crosstalk measurement becomes very complicated. Based on this, the embodiments of the present application provide a crosstalk measurement method and a crosstalk measurement apparatus, so as to simplify the existing steps of the crosstalk measurement method.
Referring to fig. 4 to 8, the present application provides a crosstalk measurement method and a crosstalk measurement apparatus, where the crosstalk measurement method includes the following steps:
controlling a to-be-detected stereoscopic display device 10 to display a preset planar color image, where the preset planar color image includes N viewpoint picture groups, each viewpoint picture group includes N viewpoint pictures, an mth viewpoint picture in the mth viewpoint picture group correspondingly displays a first color, and other viewpoint pictures correspondingly display a second color, where M is greater than or equal to 1, M is less than or equal to N, and N is a positive integer greater than or equal to 2;
at a position spaced from the stereoscopic display device 10 to be measured by a preset distance, acquiring tristimulus values of mixed colors generated by mixing the first color and the second color according to each stereoscopic viewpoint image imaged by the stereoscopic display device 10 to be measured;
and acquiring a reference tristimulus value of the first color and a reference tristimulus value of the second color, and determining the crosstalk value of the to-be-tested stereoscopic display device 10 according to the tristimulus value of the mixed color, the reference tristimulus value of the first color and the reference tristimulus value of the second color.
It can be understood that, in the present application, the crosstalk value of the stereoscopic display device 10 to be measured is determined by obtaining the reference tristimulus value of the first color, the reference tristimulus value of the second color, and the tristimulus value of the mixed color, according to the tristimulus value of the mixed color, the reference tristimulus value of the first color, and the reference tristimulus value of the second color, so that the steps of the crosstalk measurement method are simplified.
The technical solution of the present application will now be described with reference to specific embodiments.
Please refer to fig. 4, fig. 5, fig. 6 and fig. 7; fig. 4 is a flowchart of a crosstalk measurement method provided in an embodiment of the present application; fig. 5 is a plan view of a test chart displayed by a display device to be tested according to an embodiment of the present disclosure and a perspective view obtained at a preset distance; fig. 6 is a first schematic diagram of a crosstalk measuring apparatus according to an embodiment of the present application; fig. 7 is a second schematic diagram of a crosstalk measurement apparatus according to an embodiment of the present application.
The embodiment provides a crosstalk measurement method, which includes the following steps:
step S10: controlling a stereoscopic display device 10 to be tested to display a preset planar color image, where the preset planar color image includes N viewpoint picture groups, each of the viewpoint picture groups includes N viewpoint pictures, an mth viewpoint picture in the mth viewpoint picture group correspondingly displays a first color, and other viewpoint pictures correspondingly display a second color, where M is greater than or equal to 1, M is less than or equal to N, and N is a positive integer greater than or equal to 2, as shown in fig. 5.
In this embodiment, the stereoscopic display device 10 to be tested may be placed on a testing base (not shown in the drawings), and in an actual measurement, the position of the stereoscopic display device 10 to be tested may be adjusted according to an actual situation; it is understood that the testing base may be a fixed platform or a movable platform, which is not particularly limited in this embodiment.
It should be noted that, in this embodiment, the first color may be one of red, green and blue, and the second color may be another one of red, green and blue, it is understood that the first color may also be one of white and black, and the second color may also be another one of white and black.
Step S20: and at a position spaced from the stereoscopic display device 10 to be tested by a preset distance, acquiring tristimulus values of mixed colors generated by mixing the first color and the second color according to each stereoscopic viewpoint image imaged by the stereoscopic display device 10 to be tested.
In one embodiment, the step S20 includes the following steps:
step S21: and detecting tristimulus values of the mixed color generated by mixing the first color and the second color in each stereoscopic viewpoint picture at a position spaced from the stereoscopic display device 10 to be detected by the preset distance by using a colorimeter 20.
The step S21 includes the steps of:
step S211: and determining a detection range in a plane which is separated from the to-be-detected stereoscopic display device 10 by the preset distance according to the position of the first color in each stereoscopic view diagram.
Step S212: the colorimeter 20 is set in the detection range to determine the tristimulus values of the mixed color resulting from the mixing of the first color and the second color, as shown in fig. 6.
Step S30: and acquiring a reference tristimulus value of the first color and a reference tristimulus value of the second color, and determining the crosstalk value of the to-be-tested stereoscopic display device 10 according to the tristimulus value of the mixed color, the reference tristimulus value of the first color and the reference tristimulus value of the second color.
Following the step S21: in this embodiment, the step S30 includes the following steps:
step S31: acquiring a first pure color image displayed by the to-be-detected three-dimensional display device 10 at a position spaced from the to-be-detected three-dimensional display device 10 by the preset distance, wherein the first pure color image displays the first color.
Further, in the step S31, the first pure color image is acquired by using the colorimeter 20 at the preset distance from the stereoscopic display device 10 to be tested.
Step S32: and acquiring a reference tristimulus value of the first color according to the first pure color image.
Further, in the step S32, the colorimeter 20 is used to obtain a reference tristimulus value of the first color from the first pure color image.
Step S33: and acquiring a second pure color image displayed by the to-be-detected three-dimensional display device 10 at the position spaced from the to-be-detected three-dimensional display device 10 by the preset distance, wherein the first pure color image displays the second color.
Further, in the step S33, the second pure color image is acquired by using the colorimeter 20 at the preset distance from the stereoscopic display device 10 to be tested.
Step S34: and acquiring a reference tristimulus value of the second color according to the second pure color image.
Further, in the step S34, the colorimeter 20 is used to obtain a reference tristimulus value of the second color from the second pure color image.
It should be noted that, in this embodiment, the stereoscopic display device to be measured 10 may be enabled to display a first pure color image and a second pure color image, and the colorimeter 20 is adopted to obtain the reference tristimulus values of the first color and the reference tristimulus values of the second color at a position spaced from the stereoscopic display device to be measured 10 by the preset distance, and a database may also be constructed, where the database is used to store the reference tristimulus values of the respective colors, which is not limited in this embodiment.
Step S35: and determining the crosstalk value of the to-be-tested stereoscopic display device 10 according to the tristimulus value of the mixed color, the reference tristimulus value of the first color and the reference tristimulus value of the second color.
In one embodiment, the step S20 includes the following steps:
step S21: and receiving the projection image of each stereoscopic view image displayed by the stereoscopic display device to be tested 10 by using a receiving plate 30, wherein the distance between the receiving plate 30 and the stereoscopic display device to be tested 10 is the preset distance.
It should be noted that, in this embodiment, the receiving board 30 is used to receive the projection images of the stereoscopic view maps displayed by the stereoscopic display device 10 to be tested, which is only for illustration, and in practical operation, any projection apparatus in the prior art may be used to implement the receiving board 30, wherein in order to obtain the projection images without distortion as much as possible, the receiving surface reflectivity of the receiving board 30 is greater than 55%.
Step S22: the projection image is acquired using an imaging spectrometer 40 and the tristimulus values of the mixed color resulting from the mixing of the first and second colors are determined from the projection image, as shown in fig. 7.
In this embodiment, the imaging spectrometer 40 is located on a side of the stereoscopic display device under test 10 away from the receiving plate 30, and the imaging spectrometer 40 is spaced from the stereoscopic display device under test 10 by a second preset distance; it should be noted that the second preset distance may be adjusted according to an actual operation condition, and this embodiment does not specifically limit this.
As mentioned above in step S22, in this embodiment, the step S30 includes the following steps:
step S31: acquiring a projection image of a first pure color image displayed by the to-be-detected stereoscopic display device 10 at a position spaced from the to-be-detected stereoscopic display device 10 by the preset distance, wherein the first pure color image displays the first color.
Further, in the step S31, the projection image of the first solid-color image displayed by the stereoscopic display device under test 10 is received by using the receiving board 30.
Step S32: and acquiring a reference tristimulus value of the first color according to the projection image of the first pure color image.
Further, in the step S32, the imaging spectrometer 40 is adopted to acquire a projection image of the first solid-color image, and a reference tristimulus value of the first color is determined according to the projection image of the first solid-color image.
Step S33: and acquiring a projection image of a second pure color image displayed by the to-be-detected stereoscopic display device 10 at a position spaced from the to-be-detected stereoscopic display device 10 by the preset distance, wherein the second pure color image displays the second color.
Further, in the step S33, the projection image of the second solid-color image displayed by the stereoscopic display device under test 10 is received by using the receiving board 30.
Step S34: and acquiring a reference tristimulus value of the second color according to the projection image of the second pure color image.
Further, in step S34, a projection image of the second solid-color image is obtained by using the imaging spectrometer 40, and the reference tristimulus value of the second color is determined according to the projection image of the second solid-color image.
Step S35: and determining the crosstalk value of the to-be-tested stereoscopic display device 10 according to the tristimulus value of the mixed color, the reference tristimulus value of the first color and the reference tristimulus value of the second color.
It should be noted that, in this embodiment, the imaging spectrometer 40 includes an image acquisition module and a processing module, the image acquisition module is configured to acquire a projection image of the first pure color image and a projection image of the second pure color image, and the processing module is configured to determine a reference tristimulus value of the first color according to the projection image of the first pure color image and determine a reference tristimulus value of the first color according to the projection image of the second pure color image.
Specifically, in step S30, the step of determining the crosstalk value of the stereoscopic display device 10 to be tested according to the tristimulus value of the mixed color, the reference tristimulus value of the first color, and the reference tristimulus value of the second color includes:
calculating the crosstalk value of the to-be-measured stereoscopic display device 10 at the preset distance according to the following relation (1), relation (2) and relation (3):
Figure BDA0003407489270000111
Figure BDA0003407489270000121
Figure BDA0003407489270000122
wherein X is the X stimulus amount of the mixed color, Y is the Y stimulus amount of the mixed color, and Z is the Z stimulus amount of the mixed color; xi is the X stimulus amount of the first color, Yi is the Y stimulus amount of the first color, and Zi is the Z stimulus amount of the first color; xj is the X stimulation amount of the second color, Yj is the Y stimulation amount of the second color, and Zj is the Z stimulation amount of the second color; i is the attenuation coefficient of the first color; j is the attenuation coefficient of the second color.
The crosstalk value of the stereoscopic display device 10 to be tested is an average value of the sum of i/j in the relational expression (1), the relational expression (2) and the relational expression (3).
Please refer to fig. 8, which is a schematic structural diagram of a to-be-tested stereoscopic display device according to an embodiment of the present application.
Before the step 10, the crosstalk measurement method provided in this embodiment further includes the following steps:
step 01: determining the preset distance according to the imaging parameters of the stereoscopic display device 10 to be measured, wherein the stereoscopic display device 10 to be measured includes a grating plate 11 and a display panel 12 which are oppositely arranged, the display panel 12 includes a plurality of sub-pixels 121, the imaging parameters of the stereoscopic display device 10 to be measured include a distance T between adjacent viewpoints, a distance D between the grating plate 11 and the display panel 12, and a width W of any of the sub-pixels 121, and the preset distance L is calculated according to the following relation (4):
Figure BDA0003407489270000123
it should be noted that, in this embodiment, in order to avoid the influence of light in the external environment on the measurement result, in this embodiment, the stereoscopic display device 10 under test is placed in a dark room for crosstalk measurement.
In addition, in actual operation, the crosstalk deviation may be large due to the reflection efficiency problem of the receiving board and the sensitivity problem of the spectrometer, so that the crosstalk i/j distribution curve needs to be converted into a purity j/(j + i) distribution curve of the second color, and after smoothing processing, the main viewpoint crosstalk corresponding to the peak position of the curve needs to be calculated; it will be appreciated that the data extraction calculations referred to above may all be performed automatically by the mathematical software in the design program.
Please refer to fig. 1 to 8, it can be understood that, compared to the conventional crosstalk measurement method in which the crosstalk characteristic of the display apparatus is represented by a relative value of brightness, in the embodiment of the present application, the stereoscopic display apparatus 10 to be tested is controlled to display a preset planar color image, where the preset planar color image includes N viewpoint picture groups, each viewpoint picture group includes N viewpoint pictures, an mth viewpoint picture in the mth viewpoint picture group correspondingly displays a first color, and other viewpoint pictures correspondingly display a second color, where M is greater than or equal to 1 and less than or equal to N, and N is a positive integer greater than or equal to 2, and the stereoscopic display apparatus to be tested is determined by obtaining a reference tristimulus value of the first color, a reference tristimulus value of the second color, and a tristimulus value of the mixed color, and according to the tristimulus values of the mixed color, the reference tristimulus value of the first color, and the reference tristimulus value of the second color And the crosstalk value of 10 is set, so that the steps of the crosstalk measurement method are simplified.
The embodiment also provides a crosstalk measuring device, which comprises a control module, a data conversion module and a data processing module.
The control module is used for controlling the stereoscopic display device to be tested to display a preset planar color image, the preset planar color image comprises N viewpoint picture groups, each viewpoint picture group comprises N viewpoint pictures, the Mth viewpoint picture in the Mth viewpoint picture group correspondingly displays a first color, and the other viewpoint pictures correspondingly display a second color, wherein M is greater than or equal to 1, M is less than or equal to N, and N is a positive integer greater than or equal to 2.
The data conversion module is spaced from the stereoscopic display device 10 to be tested by a preset distance, and obtains tristimulus values of mixed colors generated by mixing the first color and the second color according to each stereoscopic viewpoint image imaged by the stereoscopic display device to be tested.
The data processing module: and the crosstalk value of the to-be-tested stereoscopic display device is determined according to the tristimulus value of the mixed color, the reference tristimulus value of the first color and the reference tristimulus value of the second color.
In an embodiment, the data conversion module includes a colorimeter, and it is understood that determining the crosstalk value of the stereoscopic display device under test according to the tristimulus values of the mixed color, the reference tristimulus value of the first color, and the reference tristimulus value of the second color by using the chromaticity is described in detail in the above embodiments, and will not be described repeatedly herein.
In an embodiment, the data conversion module includes a receiving board and an imaging spectrometer, and it is understood that determining the crosstalk value of the stereoscopic display device under test according to the tristimulus value of the mixed color, the reference tristimulus value of the first color, and the reference tristimulus value of the second color by using the receiving board and the imaging spectrometer has been described in detail in the above embodiments, and the description is not repeated here.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The crosstalk measurement method and the crosstalk measurement apparatus provided in the embodiments of the present application are described in detail above, and specific examples are applied in the present application to explain the principles and embodiments of the present application, and the description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims (10)

1. A crosstalk measurement method, characterized by comprising the steps of:
controlling a to-be-detected three-dimensional display device to display a preset planar color image, wherein the preset planar color image comprises N viewpoint picture groups, each viewpoint picture group comprises N viewpoint pictures, the Mth viewpoint picture in the Mth viewpoint picture group correspondingly displays a first color, and other viewpoint pictures correspondingly display a second color, wherein M is greater than or equal to 1, M is less than or equal to N, and N is a positive integer greater than or equal to 2;
at a position separated from the stereoscopic display device to be detected by a preset distance, acquiring tristimulus values of mixed colors generated by mixing the first color and the second color according to each stereoscopic viewpoint image imaged by the stereoscopic display device to be detected;
and acquiring a reference tristimulus value of the first color and a reference tristimulus value of the second color, and determining the crosstalk value of the to-be-tested stereoscopic display device according to the tristimulus value of the mixed color, the reference tristimulus value of the first color and the reference tristimulus value of the second color.
2. The crosstalk measurement method according to claim 1, wherein the step of obtaining the reference tristimulus value of the first color and the reference tristimulus value of the second color, and determining the crosstalk value of the stereoscopic display device under test according to the tristimulus value of the mixed color, the reference tristimulus value of the first color, and the reference tristimulus value of the second color comprises:
acquiring a first pure color image displayed by the stereoscopic display device to be detected at a position separated from the stereoscopic display device to be detected by the preset distance, wherein the first pure color image displays the first color;
acquiring a reference tristimulus value of the first color according to the first pure color image;
acquiring a second pure color image displayed by the stereoscopic display device to be detected at a position separated from the stereoscopic display device to be detected by the preset distance, wherein the first pure color image displays the second color;
acquiring a reference tristimulus value of the second color according to the second pure color image;
and determining the crosstalk value of the to-be-tested stereoscopic display device according to the tristimulus value of the mixed color, the reference tristimulus value of the first color and the reference tristimulus value of the second color.
3. The crosstalk measurement method according to claim 2, wherein the first and second pure color images are acquired at the preset distance from the stereoscopic display device under test using a colorimeter;
acquiring a reference tristimulus value of the first color according to the first pure color image by using the colorimeter;
and acquiring a reference tristimulus value of the second color according to the second pure color image by using the colorimeter.
4. The crosstalk measurement method according to claim 2, wherein the step of determining the crosstalk value of the stereoscopic display device under test according to the tristimulus value of the mixed color, the reference tristimulus value of the first color, and the reference tristimulus value of the second color comprises:
calculating the crosstalk value of the to-be-measured stereoscopic display device at the preset distance according to the following relational expression (1), relational expression (2) and relational expression (3):
Figure FDA0003407489260000021
Figure FDA0003407489260000022
Figure FDA0003407489260000023
wherein X is the X stimulus amount of the mixed color, Y is the Y stimulus amount of the mixed color, and Z is the Z stimulus amount of the mixed color; xi is the X stimulus amount of the first color, Yi is the Y stimulus amount of the first color, and Zi is the Z stimulus amount of the first color; xj is the X stimulation amount of the second color, Yj is the Y stimulation amount of the second color, and Zj is the Z stimulation amount of the second color; i is the attenuation coefficient of the first color; j is the attenuation coefficient of the second color;
the crosstalk value of the to-be-tested three-dimensional display device is an average value of the sum of i/j in the relational expression (1), the relational expression (2) and the relational expression (3).
5. The crosstalk measurement method according to claim 2, wherein before the step of controlling the stereoscopic display device under test to display a predetermined planar color image, the method further comprises:
determining the preset distance according to imaging parameters of the stereoscopic display device to be detected, wherein the stereoscopic display device to be detected comprises a grating board and a display panel which are arranged oppositely, the display panel comprises a plurality of sub-pixels, the imaging parameters of the stereoscopic display device to be detected comprise a distance T between adjacent viewpoints, a distance D between the grating board and the display panel and a width W of any one of the sub-pixels, and the preset distance L is calculated according to the following relation (4):
Figure FDA0003407489260000031
6. the crosstalk measuring method according to claim 1, wherein said step of acquiring a tristimulus value of a mixed color produced by mixing the first color and the second color from each stereoscopic viewpoint image imaged by the stereoscopic display device under test at a predetermined distance from the stereoscopic display device under test comprises:
and detecting tristimulus values of the mixed color generated by mixing the first color and the second color in each stereoscopic viewpoint picture at a position separated from the stereoscopic display device to be detected by the preset distance by using a colorimeter.
7. The crosstalk measuring method according to claim 6, wherein the step of detecting, using a colorimeter, the tristimulus values of the mixed color produced by mixing the first color and the second color in each of the stereoscopic viewpoint maps at the preset distance from the stereoscopic display device under test comprises:
determining a detection range in a plane which is separated from the stereoscopic display device to be detected by the preset distance according to the position of the first color in each stereoscopic view diagram;
setting the colorimeter within the detection range to determine tristimulus values of the mixed color resulting from mixing the first color and the second color.
8. The crosstalk measuring method according to claim 1, wherein said step of acquiring a tristimulus value of a mixed color produced by mixing the first color and the second color from each stereoscopic viewpoint image imaged by the stereoscopic display device under test at a predetermined distance from the stereoscopic display device under test comprises:
receiving the projection images of the stereoscopic view images displayed by the stereoscopic display device to be detected by using a receiving plate, wherein the distance between the receiving plate and the stereoscopic display device to be detected is the preset distance;
and acquiring the projection image by adopting an imaging spectrometer, and determining the tristimulus value of the mixed color generated by mixing the first color and the second color according to the projection image.
9. The crosstalk measurement method according to claim 1, wherein the stereoscopic display device under test is placed in a dark room for crosstalk measurement.
10. A crosstalk measurement apparatus, comprising:
a control module: the device comprises a control module, a display module and a display module, wherein the control module is used for controlling a to-be-detected three-dimensional display device to display a preset planar color image, the preset planar color image comprises N viewpoint picture groups, each viewpoint picture group comprises N viewpoint pictures, the Mth viewpoint picture in the Mth viewpoint picture group correspondingly displays a first color, and other viewpoint pictures correspondingly display a second color, wherein M is greater than or equal to 1, M is less than or equal to N, and N is a positive integer greater than or equal to 2;
the data conversion module: a preset distance is reserved between the three-dimensional display device to be detected, and the tristimulus values of the mixed color generated by mixing the first color and the second color are obtained according to each three-dimensional viewpoint image imaged by the three-dimensional display device to be detected;
a data processing module: and the crosstalk value of the to-be-tested stereoscopic display device is determined according to the tristimulus value of the mixed color, the reference tristimulus value of the first color and the reference tristimulus value of the second color.
CN202111521218.8A 2021-12-13 2021-12-13 Crosstalk measuring method and device Pending CN114222116A (en)

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