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Method for improving permeability and dynamic range of video image

A dynamic range, video image technology, applied in the field of video images, can solve the problems of uncomfortable image effects, gray images, and inability to adapt, and achieve the effects of improving image transparency and dynamic range, smooth curves, and simple operation methods.

Active Publication Date: 2014-07-30
上海集光安防科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the image effect of linear display is often not comfortable for the eyes. The most intuitive feeling is that the permeability is relatively poor and the image is gray, so many manufacturers use Take a value of 2.0 or 1.8, or even A smaller correction curve makes the overall image darker, so that the contrast of the image will be stronger, making it more comfortable for the eyes
However, these cured gamma curves are generally not suitable for all scenarios, all users and all back-end display devices. , it is particularly important to adjust the gamma correction curve according to the actual scene

Method used

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  • Method for improving permeability and dynamic range of video image

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Embodiment

[0046] A method for improving the transparency and dynamic range of video images, comprising the steps of:

[0047] (1) On the basis of the internal curve in the gamma correction module, a default linear curve is superimposed, which is called the user curve; and the newly added user curve and the internal curve are independently adjusted without affecting each other. What the user modifies is user curve, while the internal curve can be adjusted by the engineer, assuming the output voltage of the user curve is V uo , the input voltage is V ui , the relationship between them is expressed by the following formula:

[0048]

[0049] Assume the output voltage of the inner curve is V O , the input voltage is V i , the relationship between them is expressed by the following formula:

[0050]

[0051] (2) Combine the user curve with the internal curve to generate a new composite curve:

[0052] In order to allow the user curve and the user curve to be superimposed and compo...

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Abstract

The invention discloses a method for improving permeability and dynamic range of a video image. According to the method, the purpose of improving the permeability and the dynamic range of the image is achieved in the mode that a user curve is superposed upon a traditional gamma curve, the shape of the user curve is made to correspond to the permeability and the dynamic range of the video image, and the user curve is adjusted by a user. The method is easy and convenient to operate, it can be ensured that curves are smooth, and the method is more flexible and more adaptive to scenes compared with a traditional adjustment method.

Description

technical field [0001] The invention relates to the technical field of video images, in particular to a method for improving the transparency and dynamic range of video images. Background technique [0002] In recent years, with the rapid development and popularization of computer technology and network technology, video image technology has undergone a series of transformations from analog to digital, from digital to network, from standard definition to high definition, and has been used in various aspects of people's daily life Fields, such as security monitoring, the Internet, medical care, automobiles, home appliances, mobile phones, etc., it can be said that people are increasingly inseparable from video. As a result, people have higher and higher requirements for video image quality, among which transparency and dynamic range are two very important indicators for judging video image quality. Transparency is the most intuitive feeling of a video image. An image with hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G5/00G09G5/10
Inventor 柳庆祥陈建群付腾桂
Owner 上海集光安防科技股份有限公司
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