CN116773022A - Stereoscopic color gamut measurement method and system - Google Patents
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Abstract
The application provides a method and a system for measuring a stereoscopic color gamut, which belong to the technical field of measurement of display equipment, and the method comprises the following steps: acquiring a color sampling signal output by display equipment under a preset color gamut standard; converting the color sampling signals into LAB color spaces under target reference white points and target color gamut standards, and calculating corresponding stereoscopic color gamut measurement volumes; and quantitatively evaluating the stereoscopic color gamut of the display device by taking the stereoscopic color gamut standard volume as a reference and combining the stereoscopic color gamut measurement volume, wherein the stereoscopic color gamut standard volume is determined under a preset color gamut standard. According to the application, the three-dimensional color gamut measurement volume under different measurement standards can be calculated by selecting different target reference white points and target color gamut standards, and the three-dimensional color gamut of the display device can be evaluated in a multi-dimensional manner; furthermore, the stereoscopic gamut expression capability of the display device can be evaluated more comprehensively and accurately by taking the stereoscopic gamut standard volume as a reference and combining the stereoscopic gamut measurement volume.
Description
Technical Field
The application relates to the technical field of display equipment measurement, in particular to a stereoscopic color gamut measurement method and system.
Background
Compared with the traditional two-dimensional chromaticity diagram, the stereoscopic color gamut has richer levels and more real effects on color expression, and can better restore colors in the real world. Meanwhile, the stereoscopic color gamut can provide higher brightness and contrast performance and support a wider color gamut range, so that the detail expression capability of the image is enhanced, and the visual requirement of human eyes is met. Therefore, the stereoscopic color gamut is widely applied and popularized in the application of the display industry in recent years.
However, in the application of the stereoscopic color gamut, there is a constant lack of an effective quantization index for comprehensively and accurately measuring and evaluating the stereoscopic color gamut characteristics of the display screen.
Therefore, a technical solution for stereoscopic gamut measurement is needed to achieve accurate measurement and evaluation of stereoscopic gamut characteristics.
Disclosure of Invention
The application provides a stereoscopic color gamut measuring method and a stereoscopic color gamut measuring system, which are used for solving the defect that the stereoscopic color gamut characteristics of a display screen are difficult to comprehensively and accurately measure and evaluate in the prior art.
In a first aspect, the present application provides a stereoscopic gamut measurement method, including: acquiring a color sampling signal output by display equipment under a preset color gamut standard; converting the color sampling signals into LAB color spaces under target reference white points and target color gamut standards, and calculating corresponding stereoscopic color gamut measurement volumes; taking the standard volume of the stereoscopic color gamut as a reference and combining the measurement volume of the stereoscopic color gamut to quantitatively evaluate the stereoscopic color gamut of the display equipment; wherein the stereoscopic gamut standard volume is determined under a preset gamut standard.
According to the stereoscopic color gamut measuring method provided by the application, the step of obtaining the stereoscopic color gamut standard volume comprises the following steps: uniformly sampling in a color space under a preset color gamut standard to obtain a corresponding standard space point cloud; and calculating the volume of the standard space point cloud by using a convex hull algorithm, and taking the volume as the standard volume of the stereoscopic color gamut of the display equipment.
According to the stereoscopic color gamut measuring method provided by the application, the color sampling signal output by the display device under the preset color gamut standard is obtained, and the method comprises the following steps: sequentially displaying the test patterns in the preset test pattern set by using a display device; the test chart is set based on a preset color gamut standard; after the continuous display time length of each test chart is larger than a preset threshold value, color data of each test chart is measured by utilizing a color signal acquisition device so as to generate the color sampling signal output by the display device.
According to the stereoscopic gamut measurement method provided by the application, the color sampling signal is converted into a target reference white point and a LAB color space under a target gamut standard, and a corresponding stereoscopic gamut measurement volume is calculated, and the method comprises the following steps: converting the color sampling signal into an XYZ color space to obtain an XYZ tristimulus value signal corresponding to the color sampling signal; determining a target reference white point and a target color gamut standard, and converting the XYZ tristimulus value signals into LAB color spaces under the target reference white point and the target color gamut standard to generate a measurement space point cloud; and calculating the volume of the measurement space point cloud by using a convex hull algorithm, and taking the volume as the measurement volume of the stereoscopic color gamut.
According to the stereoscopic color gamut measuring method provided by the application, the stereoscopic color gamut of the display device is quantitatively evaluated by taking the standard volume of the stereoscopic color gamut as a reference and combining the measured volume of the stereoscopic color gamut, and the method comprises the following steps: determining an intersection point cloud according to the intersection of the standard space point cloud corresponding to the stereoscopic color gamut standard volume and the measurement space point cloud corresponding to the stereoscopic color gamut measurement volume; calculating the volume of the intersection point cloud as a cross volume; and quantitatively evaluating the expression capacity of the stereoscopic gamut of the display device according to the cross volume, the stereoscopic gamut measurement volume and the stereoscopic gamut standard volume.
According to the stereoscopic gamut measurement method provided by the application, the quantitative evaluation of the expressive power of the stereoscopic gamut of the display device according to the cross volume, the stereoscopic gamut measurement volume and the stereoscopic gamut standard volume comprises the following steps: calculating the evaluation value of the stereoscopic color gamut of the display device in a weighting manner according to the first volume ratio and the second volume ratio; quantitatively evaluating the stereoscopic gamut expression capability of the display device according to the evaluation value; the first volume ratio is the ratio of the stereoscopic gamut measurement volume to the stereoscopic gamut standard volume, and the second volume ratio is the ratio of the intersection volume to the stereoscopic gamut standard volume.
According to the stereoscopic color gamut measuring method provided by the application, the preset color gamut standard is the sRGB standard.
According to the stereoscopic color gamut measuring method provided by the application, the color signal acquisition equipment is a color analyzer.
In a second aspect, the present application also provides a stereoscopic gamut measurement system, comprising: display device, color signal acquisition device and control system; the control system is configured for controlling the display device and the color signal acquisition device to implement the stereoscopic gamut measurement method according to any of the preceding claims.
The stereoscopic color gamut measuring system provided by the application further comprises: a mechanical positioning device; the mechanical positioning device is used for fixing the color signal acquisition equipment so as to acquire the output of the display equipment.
In a third aspect, the present application also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of a method of stereoscopic gamut measurement as described in any of the above.
In summary, according to the stereoscopic color gamut measuring method and system provided by the application, the stereoscopic color gamut measuring volume under different measuring standards can be calculated by selecting different target reference white points and target color gamut standards, and the stereoscopic color gamut of the display device can be evaluated in multiple dimensions; furthermore, the stereoscopic gamut expression capability of the display device can be evaluated more comprehensively and accurately by taking the stereoscopic gamut standard volume as a reference and combining the stereoscopic gamut measurement volume.
Furthermore, the application performs uniform sampling in a color space under the preset color gamut standard, calculates the stereoscopic color gamut standard volume by combining a convex hull algorithm, and considers the speed and the precision of volume calculation.
Further, according to the method and the system for collecting the color sampling signals, after the continuous display time of each test chart is longer than the preset threshold value, the color data of each test chart is measured by using the color signal collecting equipment, so that the precision of the color sampling signals can be improved, and the precision of the subsequent stereoscopic color gamut evaluation can be further improved.
Further, the acquisition method and the acquisition system for the color sampling signals, provided by the application, are used for calculating the evaluation value of the stereoscopic color gamut of the display device in a weighting manner according to the first volume ratio and the second volume ratio, and quantitatively evaluating the stereoscopic color gamut expression capacity of the display device according to the evaluation value, so that the quantitative evaluation of the stereoscopic color gamut expression capacity is realized, and the evaluation is more visual and objective.
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In order to more clearly illustrate the application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a stereoscopic color gamut measurement method provided by the application;
FIG. 2 is a schematic diagram of a standard volume of a stereoscopic gamut provided by the present application;
FIG. 3 is a schematic diagram of a volumetric gamut measurement provided by the present application;
fig. 4 is a schematic flow chart of quantitatively evaluating the stereoscopic color gamut of a display device according to the present application;
fig. 5 is a schematic structural diagram of the stereoscopic color gamut measurement system provided by the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that in the description of embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The terms "first," "second," and the like in this specification are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. In addition, "and/or" indicates at least one of the connected objects, and the character "/", generally indicates that the associated object is an "or" relationship.
The method and system for measuring the stereoscopic gamut according to the embodiments of the present application are described below with reference to fig. 1 to 5.
Fig. 1 is a schematic flow chart of the stereoscopic color gamut measurement method provided by the application, as shown in fig. 1, including but not limited to the following steps:
step 101: and acquiring a color sampling signal output by the display device under a preset color gamut standard.
The preset color gamut standard may be sRGB standard, and the display device may be a liquid crystal display device or the like.
In particular, the sampling of the color signals may be performed by a color signal acquisition device, such as a color analyzer, for the display device.
It will be appreciated that in the case of analysis of the color gamut of a display device, the display device will be configured to display as comprehensively as possible all of the color values that it can display; i.e. the color sampling signal in the present application is obtained for global sampling of the color values of the display device.
Step 102: and converting the color sampling signals into LAB color spaces under the target reference white point and target color gamut standard, and calculating the corresponding stereoscopic color gamut measurement volume.
The target reference white point may be selected as a D50, D65 standard light source and the target gamut standard may be sRGB, P3, or NTSC, among other gamut standards.
Step 103: and quantitatively evaluating the stereoscopic gamut of the display device by taking the stereoscopic gamut standard volume as a reference and combining the stereoscopic gamut measurement volume.
Wherein the stereoscopic gamut standard volume is determined under a preset gamut standard. It should be noted that, the standard volume of the stereoscopic color gamut may be directly obtained from the internal parameters of the display device, or may be accurately estimated according to the actual display effect of the display device.
According to the stereoscopic color gamut measuring method provided by the application, the stereoscopic color gamut measuring volume under different measuring standards can be calculated by selecting different target reference white points and target color gamut standards, and the stereoscopic color gamut of the display equipment can be evaluated in multiple dimensions; furthermore, the stereoscopic gamut expression capability of the display device can be evaluated more comprehensively and accurately by taking the stereoscopic gamut standard volume as a reference and combining the stereoscopic gamut measurement volume.
Based on the foregoing embodiments, as an optional embodiment, the present application provides a stereoscopic color gamut measurement method, where the step of obtaining a stereoscopic color gamut standard volume includes: uniformly sampling in a color space under a preset color gamut standard to obtain a corresponding standard space point cloud; and calculating the volume of the standard space point cloud by using a convex hull algorithm, and taking the volume as the standard volume of the stereoscopic color gamut of the display equipment.
Specifically, taking the preset color gamut standard as sRGB as an example, in the color space corresponding to the preset color gamut standard, the sampling points have values ranging from (0, 0) to (255, 255, 255). The method can sample in a fixed-interval mode to obtain the standard space point cloud so as to improve the accuracy of the calculated standard volume of the stereoscopic color gamut.
Fig. 2 is a schematic diagram of a standard volume of a stereoscopic gamut provided by the present application, as shown in fig. 2, wherein dimension L represents luminance,aand b represents the color opponent dimension. After the standard space point cloud (namely, the space point cloud corresponding to the stereoscopic color gamut standard volume) is obtained, the stereoscopic color gamut standard volume corresponding to the standard space point cloud can be calculated by utilizing a convex hull algorithm. The convex hull algorithm is the prior art and will not be described herein.
Based on the foregoing embodiments, as an optional embodiment, the stereoscopic color gamut measurement method provided by the present application, the obtaining a color sampling signal output by a display device under a preset color gamut standard includes: sequentially displaying the test patterns in the preset test pattern set by using a display device; after the continuous display time length of each test chart is larger than a preset threshold value, color data of each test chart is measured by utilizing a color signal acquisition device so as to generate the color sampling signal output by the display device.
The test atlas may be generated on a computing device such as a computer, including test charts such as black dots (0, 0), monochromatic red light (32,0,0) through (255, 0), monochromatic green light (0,32,0) through (0,255,0), monochromatic blue light (0,0,32) through (0,0,255), bi-color blends such as (32,32,0), (32, 0, 32), and tri-color blends (32,32,32). The test chart set test charts are all set based on the preset color gamut standard, and all the test charts can integrally represent the integral standard color under the preset color gamut standard.
Alternatively, the present application may set the test charts in the test chart set to a form of automatically switching display on the display device. After the current test chart is continuously displayed for a preset time, switching the test chart, and continuously displaying the next test chart.
Alternatively, the color signal acquisition device may be a color analyzer, the signal acquisition end of which is aligned with the test chart. In order to improve the accuracy of signal acquisition, the color analyzer may perform the acquisition of color data of each test chart after the continuous display time of the test chart is longer than a preset threshold (i.e., the test chart is ensured to be in a stable display state). Based on the color data acquisition mode of the embodiment, after all the test patterns are traversed to acquire color data, a color sampling signal representing the color display capability of the display device can be obtained.
The preset threshold value in the application can be adjusted and set according to actual needs.
Based on the foregoing embodiments, as an optional embodiment, the method for measuring a stereoscopic color gamut provided by the present application converts the color sampling signal into a target reference white point and LAB color space under a target color gamut standard, and calculates a corresponding stereoscopic color gamut measurement volume, including: converting the color sampling signal into an XYZ color space to obtain an XYZ tristimulus value signal corresponding to the color sampling signal; determining a target reference white point and a target color gamut standard, and converting the XYZ tristimulus value signals into LAB color spaces under the target reference white point and the target color gamut standard to generate a measurement space point cloud; and calculating the volume of the measurement space point cloud by using a convex hull algorithm, and taking the volume as the measurement volume of the stereoscopic color gamut.
It will be appreciated that the color analyzer is a measuring instrument for performing chromaticity and brightness measurements, and the data collected by the color analyzer in the present application may be in the form of color data in xyLv color space, lv represents brightness, and xy represents color coordinates. It should be noted that any color data format can be converted into a data format of XYZ color space, that is, XYZ tristimulus value signals through an existing conversion formula.
Further, the method converts the XYZ tristimulus value signals into an LAB color space to generate a measurement space point cloud corresponding to the XYZ tristimulus value signals. When converting the XYZ tristimulus value signals, the application needs to pre-select a target reference white point and a target color gamut standard. The target reference white point may be a D50, D65 standard light source, and the target color gamut standard may be sRGB, P3, or NTSC, etc.
FIG. 3 is a perspective view of the present applicationA schematic diagram of the domain measurement volume is shown in fig. 3, where dimension L represents the luminance,aand b represents the color opponent dimension. After the measurement space point cloud is obtained, the solid color gamut measurement volume corresponding to the measurement space point cloud can be calculated by using a convex hull algorithm. Likewise, the convex hull algorithm is prior art and will not be described in detail herein.
Fig. 4 is a schematic flow chart of quantitative evaluation of a stereoscopic color gamut of a display device according to the present application, as shown in fig. 4, as an alternative embodiment, the present application provides a stereoscopic color gamut measurement method, which uses a stereoscopic color gamut standard volume as a reference in combination with a stereoscopic color gamut measurement volume to quantitatively evaluate the stereoscopic color gamut of the display device, and includes the following steps:
step 401: and determining an intersection point cloud according to the intersection of the standard space point cloud corresponding to the stereoscopic color gamut standard volume and the measurement space point cloud corresponding to the stereoscopic color gamut measurement volume.
It is understood that an intersection point cloud is a point cloud that belongs to both a standard point cloud and a measurement point cloud, i.e. an intersection of a standard point cloud and a measurement point cloud.
Step 402: and calculating the volume of the intersection point cloud as a crossing volume.
Alternatively, embodiments of the present application may also calculate the volume of the intersection point cloud by a convex hull algorithm.
Step 403: and quantitatively evaluating the expression capacity of the stereoscopic gamut of the display device according to the cross volume, the stereoscopic gamut measurement volume and the stereoscopic gamut standard volume.
It can be understood that the larger the proportion of the cross volume to the standard volume of the stereoscopic color gamut, the stronger the expression capability of the stereoscopic color gamut is indicated; the closer the measured volume of the stereoscopic gamut is to the standard volume of the stereoscopic gamut, the stronger the expressive power of the stereoscopic gamut is. The specific numerical values based on the crossed volume and the stereoscopic color gamut measurement volume can realize more accurate quantitative evaluation of the expression capacity of the stereoscopic color gamut.
Based on the foregoing embodiments, as an optional embodiment, the method for measuring a stereoscopic color gamut provided by the present application quantitatively evaluates, according to the intersecting volume, the stereoscopic color gamut measurement volume, and a stereoscopic color gamut standard volume, an expressive ability of a stereoscopic color gamut of the display device, specifically: calculating the evaluation value of the stereoscopic color gamut of the display device in a weighting manner according to the first volume ratio and the second volume ratio; and quantitatively evaluating the stereoscopic gamut expression capability of the display device according to the evaluation value.
The first volume ratio is the ratio of the stereoscopic gamut measurement volume to the stereoscopic gamut standard volume, and the second volume ratio is the ratio of the intersection volume to the stereoscopic gamut standard volume.
For example, when calculating the evaluation value, the weights corresponding to the first volume ratio and the second volume ratio are all set to 0.5. Then the calculated evaluation value is 0.8 x 0.5+0.9 x 0.5=0.85 with a first volume ratio of 0.8 and a second volume ratio of 0.9.
It will be appreciated that a closer evaluation value to 1 indicates a stronger stereoscopic gamut rendering capability of the display device, thereby enabling a quantitative evaluation of the stereoscopic gamut of the display device. The application realizes the evaluation of the three-dimensional color gamut measuring method by evaluating the specific numerical value of the numerical values.
Fig. 5 is a schematic structural diagram of a stereoscopic gamut measurement system according to the present application, as shown in fig. 5, the system includes: a control system 501, a display device 502 and a color signal acquisition device 503;
wherein the control system is configured for controlling the display device 502 and the color signal acquisition device 503 to implement the stereoscopic gamut measurement method as described in any of the embodiments above.
Alternatively, the control system 501 may be a software system (or computer program) based on computer hardware.
Specifically, the control system 501 controls the color signal acquisition device 503 to acquire a color sampling signal output by the display device 502 under a preset color gamut standard;
the control system 501 converts the color sampling signal into a target reference white point and a LAB color space under a target color gamut standard, and calculates a corresponding stereoscopic color gamut measurement volume;
the control system 501 performs quantitative evaluation on the stereoscopic gamut of the display device by combining the stereoscopic gamut measurement volume with the stereoscopic gamut standard volume as a reference; wherein the stereoscopic gamut standard volume is determined under a preset gamut standard.
Based on the foregoing embodiments, as an optional embodiment, the stereoscopic gamut measurement system provided by the present application further includes: a mechanical positioning device; the mechanical positioning device is used for fixing the color signal acquisition equipment so as to acquire the output of the display equipment.
Specifically, the mechanical positioning device can be a movable bracket, and the mechanical positioning device is used for controlling the alignment and placement of the color signal acquisition equipment and the display equipment.
It should be noted that, in the specific operation of the stereoscopic color gamut measurement system provided by the embodiment of the present application, the stereoscopic color gamut measurement method described in any of the above embodiments may be executed, which is not described in detail in this embodiment.
In summary, according to the stereoscopic color gamut measuring method and system provided by the application, the stereoscopic color gamut measuring volume under different measuring standards can be calculated by selecting different target reference white points and target color gamut standards, and the stereoscopic color gamut of the display device can be evaluated in multiple dimensions; furthermore, the stereoscopic gamut expression capability of the display device can be evaluated more comprehensively and accurately by taking the stereoscopic gamut standard volume as a reference and combining the stereoscopic gamut measurement volume.
Furthermore, the application performs uniform sampling in a color space under the preset color gamut standard, calculates the stereoscopic color gamut standard volume by combining a convex hull algorithm, and considers the speed and the precision of volume calculation.
Further, according to the method and the system for collecting the color sampling signals, after the continuous display time of each test chart is longer than the preset threshold value, the color data of each test chart is measured by using the color signal collecting equipment, so that the precision of the color sampling signals can be improved, and the precision of the subsequent stereoscopic color gamut evaluation can be further improved.
Further, the acquisition method and the acquisition system for the color sampling signals, provided by the application, are used for calculating the evaluation value of the stereoscopic color gamut of the display device in a weighting manner according to the first volume ratio and the second volume ratio, and quantitatively evaluating the stereoscopic color gamut expression capacity of the display device according to the evaluation value, so that the quantitative evaluation of the stereoscopic color gamut expression capacity is realized, and the evaluation is more visual and objective.
In another aspect, the present application also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, are capable of performing the method of stereoscopic gamut measurement provided by the embodiments described above, the method comprising: acquiring a color sampling signal output by display equipment under a preset color gamut standard; converting the color sampling signals into LAB color spaces under target reference white points and target color gamut standards, and calculating corresponding stereoscopic color gamut measurement volumes; taking the standard volume of the stereoscopic color gamut as a reference and combining the measurement volume of the stereoscopic color gamut to quantitatively evaluate the stereoscopic color gamut of the display equipment; wherein the stereoscopic gamut standard volume is determined under a preset gamut standard.
In yet another aspect, the present application also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the stereoscopic gamut measurement method provided by the above embodiments, the method comprising: acquiring a color sampling signal output by display equipment under a preset color gamut standard; converting the color sampling signals into LAB color spaces under target reference white points and target color gamut standards, and calculating corresponding stereoscopic color gamut measurement volumes; taking the standard volume of the stereoscopic color gamut as a reference and combining the measurement volume of the stereoscopic color gamut to quantitatively evaluate the stereoscopic color gamut of the display equipment; wherein the stereoscopic gamut standard volume is determined under a preset gamut standard.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A method for measuring a stereoscopic gamut, comprising:
acquiring a color sampling signal output by display equipment under a preset color gamut standard;
converting the color sampling signals into LAB color spaces under target reference white points and target color gamut standards, and calculating corresponding stereoscopic color gamut measurement volumes;
taking the standard volume of the stereoscopic color gamut as a reference and combining the measurement volume of the stereoscopic color gamut to quantitatively evaluate the stereoscopic color gamut of the display equipment; wherein the stereoscopic gamut standard volume is determined under a preset gamut standard.
2. The method of claim 1, wherein the step of obtaining a standard volume of the stereoscopic gamut comprises:
uniformly sampling in a color space under a preset color gamut standard to obtain a corresponding standard space point cloud;
and calculating the volume of the standard space point cloud by using a convex hull algorithm, and taking the volume as the standard volume of the stereoscopic color gamut of the display equipment.
3. The stereoscopic gamut measurement method according to claim 1, wherein acquiring the color sampling signal output by the display device under the preset gamut standard comprises:
sequentially displaying the test patterns in the preset test pattern set by using a display device; the test chart is set based on a preset color gamut standard;
after the continuous display time length of each test chart is larger than a preset threshold value, color data of each test chart is measured by utilizing a color signal acquisition device so as to generate the color sampling signal output by the display device.
4. The method of claim 1, wherein translating the color sampling signal to a target reference white point and LAB color space under a target color gamut standard and calculating a corresponding stereoscopic gamut measurement volume comprises:
converting the color sampling signal into an XYZ color space to obtain an XYZ tristimulus value signal corresponding to the color sampling signal;
determining a target reference white point and a target color gamut standard, and converting the XYZ tristimulus value signals into LAB color spaces under the target reference white point and the target color gamut standard to generate a measurement space point cloud;
and calculating the volume of the measurement space point cloud by using a convex hull algorithm, and taking the volume as the measurement volume of the stereoscopic color gamut.
5. The method of claim 1, wherein quantitatively evaluating the stereoscopic gamut of the display device in combination with the stereoscopic gamut measurement volume based on the stereoscopic gamut standard volume, comprises:
determining an intersection point cloud according to the intersection of the standard space point cloud corresponding to the stereoscopic color gamut standard volume and the measurement space point cloud corresponding to the stereoscopic color gamut measurement volume;
calculating the volume of the intersection point cloud as a cross volume;
and quantitatively evaluating the expression capacity of the stereoscopic gamut of the display device according to the cross volume, the stereoscopic gamut measurement volume and the stereoscopic gamut standard volume.
6. The method of claim 5, wherein quantitatively evaluating the expressive power of the stereoscopic gamut of the display device based on the intersection volume, the stereoscopic gamut measurement volume, and the stereoscopic gamut standard volume, comprises:
calculating the evaluation value of the stereoscopic color gamut of the display device in a weighting manner according to the first volume ratio and the second volume ratio;
quantitatively evaluating the stereoscopic gamut expression capability of the display device according to the evaluation value;
the first volume ratio is the ratio of the stereoscopic gamut measurement volume to the stereoscopic gamut standard volume, and the second volume ratio is the ratio of the intersection volume to the stereoscopic gamut standard volume.
7. The stereoscopic gamut measurement method of claim 1 wherein the preset gamut standard is the sRGB standard.
8. A stereoscopic gamut measurement method according to claim 3, wherein the color signal acquisition device is a color analyzer.
9. A stereoscopic gamut measurement system, comprising: display device, color signal acquisition device and control system;
the control system is configured for controlling the display device and the color signal acquisition device to implement the stereoscopic gamut measurement method according to any one of claims 1 to 8.
10. The stereoscopic gamut measurement system according to claim 9, further comprising: a mechanical positioning device;
the mechanical positioning device is used for fixing the color signal acquisition equipment so as to acquire the output of the display equipment.
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| CN202311053089.3A CN116773022A (en) | 2023-08-21 | 2023-08-21 | Stereoscopic color gamut measurement method and system |
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| CN202311053089.3A CN116773022A (en) | 2023-08-21 | 2023-08-21 | Stereoscopic color gamut measurement method and system |
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