A Calculation Method of Display Device Color Gamut Boundary
A technology of color gamut boundaries and calculation methods, applied in the input/output process of calculation and data processing, instruments, etc., can solve the problems of accurate reproduction of unfavorable colors, large errors, and long calculation time, so as to facilitate the actual industrial production application and Promotion, high calculation accuracy, fast calculation effect
Active Publication Date: 2020-03-06
SHANGHAI PUBLISHING & PRINTING COLLEGE
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] For most commercial LCD displays and displays of various smart mobile terminals, their chromaticity constancy and channel additivity are relatively poor, and a general description method is usually used to describe the color gamut boundary of the device. This method has a large error and the calculation It takes a long time and needs to store a large number of data points, which is not conducive to accurate reproduction of colors
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0046] In this embodiment, the IPAD2 is used as the display device, and the color displayed by the IPAD2 is measured in a normal use environment, and the illuminance vertical to the surface of the IPAD2 is 320LX. The following examples are only descriptive, not restrictive, and therefore cannot limit the protection scope of the present invention.
[0047] figure 1 It is a flowchart of a method for calculating the color gamut boundary of a display device in an embodiment of the present invention.
[0048] Such asfigure 1 As shown, a method for calculating the color gamut boundary of a display device has the following steps:
[0049] Step 1: Determine the initial maximum r of the spherical radius r in the LCH color space max and the initial minimum r min , go to step 2.
[0050] initial minimum r min Is the initial value of iteration in the color gamut, generally used L * The midpoint of the axis, that is, point E(50, 0, 0) as the center of the color space, then there is r...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a calculation method of a color gamut boundary of a display device, which is characterized by including steps of step 1, confirming initial maximum value rmax and initial minimum value rmin of a spherical radius r in an LCH color space; step 2, reading color phase angle Alpha value, wherein the initial value Alpha is equal to 0 degree, and alpha is ranged from 0 degree to 360 degrees; step 3, reading elevation angle Theta value, wherein the initial angle Theta is equal to 90 degrees, and ranged from -90 degrees to 90 degrees; step 4, calculating r value iteratively according to a predetermined formula; step 5, calculating CIE XYZ value of the color point according to the spherical coordinate (Alpha, Theta, rk) of the color point; step 6, judging if one value of X, Y and Z values is less than 0, and comparing X, Y and Z and Xw, Yw, Zw respectively; step 7, substituting the X, Y and Z values to a reverse characterization model to calculate; step 8, judging if the color point is the color gamut boundary point by using an equipment driving value RGB; step 9, recording the chromatic value of the color point; step 10, making that elevation Theta value is equal to the sum of Theta+Delta Theta until Theta is equal to 90 degrees; step 11, making that the color phase angle Alpha value is equal to the sum of Alpha+Delta Alpha until Alpha is equal to 360 degrees; step 12, recording all color gamut boundary points.
Description
technical field [0001] The invention relates to the field of color display reproduction and color management, in particular to a calculation method for the color gamut boundary of a display device. Background technique [0002] With the continuous advancement of science and technology, color image display equipment has been greatly developed, and the color reproduction capabilities of various intelligent mobile terminals have been continuously improved. More and more users watch videos on mobile terminals such as smart phones and tablet computers. , pictures and other information. The same color information may be displayed on different display media, therefore, it is particularly important to ensure accurate color transfer between different media. The device color gamut is an important indicator to measure the color reproduction capability of the device. Different display media have different color gamut ranges. Accurately describing the device color gamut is the premise o...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/147
CPCG06F3/147
Inventor 孔玲君张建青杨晟炜方恩印蔡芳田全慧周颖梅郑亮
Owner SHANGHAI PUBLISHING & PRINTING COLLEGE