Method for generating target gamma curve of display based on visual discrimination requirement

A gamma curve and display technology, applied in the field of target gamma curve generation, to achieve the effect of accurate correction and simple calculation process

Inactive Publication Date: 2012-01-25
德为显示科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the target gamma curve fitting technology includes γ power function, DICOM GSDF function, polynomial equation, segmented gamma curve, etc. The fitting process has its own advantages and disadvantages, but they are not fitted from the perspective of visual resolution

Method used

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  • Method for generating target gamma curve of display based on visual discrimination requirement
  • Method for generating target gamma curve of display based on visual discrimination requirement
  • Method for generating target gamma curve of display based on visual discrimination requirement

Examples

Experimental program
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Effect test

Embodiment 1

[0047] like figure 2 and image 3 As shown, it is calculated with Lmin=0.2nits and Lmax=200nits, and the JND level difference is averaged according to the above formula, and the GSDF (Grayscale Standard Display Function (gray scale standard display function) curve, this curve is a special case of the present invention.

Embodiment 2

[0049] like Figure 4 and Figure 5 As shown, the calculation is based on Lmin=0.2nits and Lmax=200nits, and the JND distribution level difference is divided into 3 sections, the dark area is 0-10, the middle gray area is 11-128, and the bright area is 129-255. The normalized JND level difference of the dark area is 0 and the end point is 1; the normalized JND level difference of the middle gray scale is 1; According to the above formula, the "S" shape curve is calculated.

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Abstract

The invention discloses a method for generating a target gamma curve of a display based on a visual discrimination requirement. A just-noticeable difference (JND) is subjected to segment and distributed calculation according to a calculation formula and an inverse operation formula of an index relationship between brightness and the JND by combining the native gamma curve of the display on the basis of a display requirement, a JND index value is calculated, the target gamma curve is finally obtained, and all or part of gray scales of the generated target gamma curve can completely accord with equal-difference discrimination of human vision on the basis of the display requirement after the generated target gamma curve passes the verification of the display. The method is simple and effective, can be suitable for effectively generating the target gamma curves of various displays and is also suitable for other application of the curve, and data is simply and conveniently calculated and accurately and reliably corrected.

Description

technical field [0001] The invention relates to a method for generating a target gamma curve in a display correction process based on visual resolution requirements, and belongs to the field of display applications. Background technique [0002] Displays have different requirements for display technology in different industry applications. If the display directly displays the input data without transformation, the display effect will often not fully meet the visual resolution requirements required by the display application. Many effective information Details cannot be perceived by the human eye; and different application fields have different requirements for display effects. Therefore, monitors, especially professional monitors, need to perform gamma curve correction according to different applications in order to achieve satisfactory display effects. [0003] On the display, the brightness response trend formed by different levels of gray scale or color scale from low to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/00
Inventor 黄际雷
Owner 德为显示科技股份有限公司
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