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Method for generating target Gamma curve of display

A display and curve technology, applied in the field of target Gamma curve generation, can solve the problems of unsatisfactory actual effect, inconvenient calculation, cumbersome calculation, etc., and achieve the effect of reducing the number of calibration times, accurate calibration, and simplified calibration process

Active Publication Date: 2011-08-10
北京德为智慧科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past characteristic Gamma curve fitting technology, there are γ power function, DICOM GSDF function, polynomial equation, segmental Gamma curve, etc. The fitting process has its own advantages and disadvantages, but the actual effect is not ideal, and some methods have many steps and cumbersome calculations , it is inconvenient to calculate

Method used

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  • Method for generating target Gamma curve of display
  • Method for generating target Gamma curve of display
  • Method for generating target Gamma curve of display

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Effect test

Embodiment 1

[0042] Such as figure 2As shown, the typical Gamma curve is calculated according to the basic formula in the above fitting formula, that is, the curve represented by the basic Gamma formula. When the γ value is 1, it represents the characteristic curve of the display. The commonly used γ values ​​are 1.8, 2.0 and 2.2.

Embodiment 2

[0044] Such as image 3 As shown, the approximate DICOM (Digital Imaging and Communications in Medicine medical digital image and communication) part 14 GSDF (Grayscale Standard Display Function) curve is calculated according to the basic formula and the coefficient γ conversion formula in the above fitting formula, At this time: Y Min =0.05, Y Max = 3993.404, L = 1024, γ B = 1.85, γ E = 6.65, p = 0.5, very suitable for the requirements of medical digital image display.

Embodiment 3

[0046] Such as Figure 4 As shown, the atypical curve is calculated according to the basic formula in the above fitting formula and the coefficient γ conversion formula, such as the "S" shape curve, when γ B = 2.2, γ E =0.5, when p=2, it is an "S"-shaped curve in which the brightness changes of the dark gray scale and the bright gray scale are gentler than that of the middle gray scale section, which is very suitable for the requirements of ultrasonic image display.

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Abstract

The invention discloses a method for generating a target Gamma curve of a display, which comprises the following steps of designing a computing formula of a coefficient gamma: gamma=gammaB-(gammaB-gammaE)*[i / (L-1)]on the basis of a Gamma curve basic formula: Yi=(YMax-Ymin)*[i / (L-1)<gamma>+Ymin, and simultaneously, setting a value gamma B when the coefficient gamma corresponds to the Ymin and a value gamma E when the coefficient gamma corresponds to the YMax, and setting a power p for the gamma B to change to the gamma E so as to conveniently and accurately calculate and draw the target Gamma curve, wherein after verification by the display, the generated target Gamma curve is more accurate and smoother and can more accord with viewing habits of human eyes, the correction process of a characteristic Gamma curve is simplified, and the correction times are reduced. The method has simple and convenient data computing process and correct and reliable correction, is applicable to effective generation of the target Gamma curve of various displays, and is also applicable to other applications of the curve.

Description

technical field [0001] The invention relates to a method for generating a target Gamma curve in a display calibration process, belonging 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 characteristics of the human eye, and many information details cannot be read by the human eye. Different application fields have different requirements for display effects, so displays, especially professional displays, need to undergo Gamma curve correction in order to achieve the visual display effect required by the human eye. [0003] On the display, the brightness trend formed by different levels of gray scale or color scale from low to high is the Gamma curve, which is usually measured by a color analyzer according to the display capability of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20G09G3/00
Inventor 黄际雷浦声林何健杨德文
Owner 北京德为智慧科技有限公司
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