A rapid measurement method for the stereo color gamut of a multi-primary-color display system

Abstract

This invention discloses a rapid measurement method for the stereoscopic color gamut of a multi-primary-color display system, comprising the following steps: Step 1: Measuring the color gamut boundary of the stereoscopic color system point by point using a color luminance meter; Step 2: Calculating the stereoscopic color gamut volume of the actual display system according to an algorithm for depicting the stereoscopic color gamut boundary of the display system. This invention utilizes a color luminance meter and different test sets to measure the color coordinates and luminance of each point on the stereoscopic color gamut boundary of the actual display system, then depicts the boundary of the stereoscopic color gamut according to a certain algorithm, and calculates its stereoscopic color gamut volume. This enables the measurement of the stereoscopic color gamut of different projectors, allowing for comparison and enabling rapid and accurate measurement of the stereoscopic color gamut. Based on the measurement of the stereoscopic color gamut of a three-primary-color display system, this invention provides a method for measuring the color gamut of a multi-primary-color display system, which is highly applicable and has a wide range of applications.

Description

Technical Field

[0001] This invention relates to the field of laser technology, and more specifically to a rapid measurement method for the three-dimensional color gamut of a multi-primary-color display system. Background Technology

[0002] Color gamut is one of the most important parameters of a display system, characterizing its ability to render colors. Early color gamuts were based on the planar color gamut area of ​​the CIE-xy chromaticity diagram, and due to its simplicity and intuitiveness, it is still used in most industries today.

[0003] However, color is a three-dimensional physical quantity, including hue, saturation, and brightness. Therefore, the color gamut obtained from a planar chromaticity diagram that lacks brightness information is inaccurate. We need to accurately measure the color gamut volume of the display system in a three-dimensional color gamut. Summary of the Invention

[0004] The purpose of this invention is to provide a rapid measurement method for the three-dimensional color gamut of a multi-primary-color display system. The method uses a color luminance meter and different test sets to measure the color coordinates and luminance of each point on the boundary of the color solid of the actual display system. Then, the boundary of the color solid is drawn according to a certain algorithm, and its three-dimensional color gamut volume is calculated.

[0005] A rapid measurement method for the stereo color gamut of a multi-primary-color display system includes the following steps:

[0006] Step 1: Measure the color gamut boundary of the excellent stereoscopic image point by point using a color luminance meter;

[0007] Step 2: Calculate the actual volume of the three-dimensional color gamut of the display system based on the algorithm for depicting the boundary of the three-dimensional color gamut of the display system.

[0008] As a further aspect of the present invention: in step one, the process of obtaining the color gamut boundary is as follows:

[0009] S1: Prepare the test image set;

[0010] S2: Turn on the projector, fix a standard whiteboard in front of the projector as the screen, place a color luminance meter 3 meters away from the screen at a small angle, focus, measure the color coordinates and luminance of the projector when projecting different test patterns, and record them.

[0011] S3: Based on the color coordinates and luminance data obtained in S2, depict the color gamut boundary in the CIELAB space.

[0012] As a further aspect of the present invention: in S1, the test pattern set is drawn by a computer.

[0013] As a further aspect of the present invention: In S2, the color coordinates and brightness for different test patterns are read and recorded by a color luminance meter.

[0014] As a further aspect of the present invention: In S3, the description of the color gamut boundary in the CIELAB space is based on a series of measured color coordinates and brightness values, which are then depicted in sequence using a MATLAB program in a computer.

[0015] As a further aspect of the present invention: the color gamut coverage range under each hue angle and brightness is superimposed to obtain the entire covered color gamut, and the volume of the three-dimensional color gamut is calculated. Specifically: after the color gamut boundary is drawn, the color gamut is divided into one hundred layers according to brightness using the segmentation approximation method in CIELAB space through the MATLAB program, the area of ​​each layer is calculated, multiplied by the height, and finally summed to obtain the volume of the three-dimensional color gamut.

[0016] The beneficial effects of this invention are: This invention enables the measurement of the stereo color gamut of different projectors, allowing for comparison and enabling rapid and accurate measurement of the stereo color gamut;

[0017] Based on the three-primary-color display system stereo color gamut measurement, a method for multi-primary-color display system color gamut measurement is provided, which is highly applicable and has a wide range of applications. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a flowchart of the three-dimensional color gamut map drawing process of the present invention.

[0020] Figure 2 This is a schematic diagram of the stereo gamut measurement sequence of the present invention.

[0021] Figure 3 This is a schematic diagram of the color gamut volume of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1 As shown, this invention provides a rapid measurement method for the stereo color gamut of a multi-primary-color display system, comprising:

[0024] Step 1: Measure the color gamut boundary of the excellent stereoscopic image point by point using a color luminance meter;

[0025] Step 2: Calculate the actual volume of the three-dimensional color gamut of the display system based on the algorithm for depicting the boundary of the three-dimensional color gamut of the display system.

[0026] In one specific embodiment:

[0027] Taking the three primary color algorithm as an example:

[0028] S1: Prepare the test image set: Create test images on the computer, including 1 image with black dots (0,0,0), 8 images with single-color red light (32,0,0) to (255,0,0), 8 images with single-color green light (0,32,0) to (0,255,0), 8 images with single-color blue light (0,0,32) to (0,0,255), 24 images with mixed two colors such as (32,32,0) and (32,0,32), and 8 images with mixed three colors such as (255,255,255), for a total of 57 test images;

[0029] S2: Turn on the projector, fix a standard whiteboard in front of the projector as a screen, and place a color luminance meter at a suitable distance within a small angle;

[0030] After focusing, the color coordinates and brightness of the projector were measured and recorded sequentially when projecting different test patterns;

[0031] S3: Based on the color coordinates and luminance data obtained from the test, depict the color gamut boundary in the CIELAB space and calculate the volume of the solid color gamut.

[0032] Taking a six-color projector as an example

[0033] V1: Turn on the projector. For a six-color projector, adjust the intensity of each primary color to the ratio shown in the table below.

[0034] For example, a single primary color of 445nm is the maximum value when the blue light of 445nm is turned on to the white balance. A combination of two primary colors, 445nm and 465nm, is the maximum value when the blue light of 445nm and 465nm is turned on to the white balance at the same time, and so on.

[0035]

[0036]

[0037] V2: After completing the measurement of the data in the table above, draw a stereo color gamut diagram in the CIE xyY space as follows. Figure 1 As shown in the table below, according to the three-dimensional color gamut measurement sequence... Figure 2 As shown, its color gamut volume is calculated by converting it to the CIELAB color space. Figure 3 As shown;

[0038] Among them, each line segment can be divided into 3-8 segments, and the coordinates of each point can be measured in turn to obtain a more accurate stereo color gamut map and values.

[0039] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A rapid measurement method for the three-dimensional color gamut of a multi-primary-color display system, characterized in that, Includes the following steps: Step 1: Measure the color gamut boundary of the excellent stereoscopic image point by point using a color luminance meter; Step 2: Calculate the actual volume of the stereo color gamut of the display system based on the algorithm for depicting the stereo color gamut boundary of the display system; In step one, the process of obtaining the color gamut boundary is as follows: S1: Prepare the test image set; S2: Turn on the projector, fix a standard whiteboard in front of the projector as the screen, place a color luminance meter 3 meters away from the screen at a small angle, focus, measure the color coordinates and luminance of the projector when projecting different test patterns, and record them. S3: Based on the color coordinates and luminance data obtained in S2, depict the color gamut boundary in the CIELAB space; In S2, the color coordinates and luminance for different test patterns are read and recorded by a color luminance meter. The color gamut coverage under each hue angle and brightness is superimposed to obtain the entire covered color gamut. The volume of the solid color gamut is then calculated. Specifically, after the color gamut boundary is drawn, the CIELAB space is divided into one hundred layers according to brightness using a segmentation approximation method through a MATLAB program. The area of ​​each layer is calculated, multiplied by the height, and finally summed to obtain the volume of the solid color gamut.

2. The rapid measurement method for the stereoscopic color gamut of a multi-primary-color display system according to claim 1, characterized in that, In S1, the test dataset is drawn by computer.

3. The rapid measurement method for the stereoscopic color gamut of a multi-primary-color display system according to claim 1, characterized in that, In S3, the description of the color gamut boundary in the CIELAB space is based on a series of measured color coordinates and luminance values, which are then depicted in sequence using a MATLAB program on a computer.

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