Method and device for improving video signal gray level

A video signal and grayscale technology, applied in the field of image processing, can solve the problems of large hardware resources and inconspicuous improvement of grayscale merging phenomenon, and achieve low image quality, improve grayscale merging phenomenon, and increase hardware consumption Effect

Inactive Publication Date: 2011-01-19
HISENSE VISUAL TECH CO LTD
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Problems solved by technology

However, the current method of using random noise to solve the phenomenon of gray-level merging is to use a random mathematical model to determine the carry of truncated data. The improvement of gray-level merging is not obvious, and the design takes up more hardware resources.

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  • Method and device for improving video signal gray level
  • Method and device for improving video signal gray level
  • Method and device for improving video signal gray level

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Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0035] In order to make the advantages of the technical solution of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] Such as figure 2 As shown, the method for improving the gray level of the video signal includes:

[0037] S201. Generate pseudorandom noise. According to the data in each register, the low and high bits of the pseudo-random noise that...

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Abstract

The embodiment of the invention discloses a method and a device for improving video signal gray level. The method comprises the steps of generating pseudo-random noise; receiving the pseudo-random noise, as well as inputting pixel values of each color channel, and carrying out anti-Gamma correction. The devices comprises a random noise generation module and an anti-Gamma correction module, wherein the random noise generation module is used for generating pseudo-random noise; and the anti-Gamma correction module is used for receiving the pseudo-random noise as well as inputting pixel values ofeach color channel and carrying out anti-Gamma correction. The invention is suitable for improving combined phenomenon of video signal gray level.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and device for improving the gray level of video signals. Background technique [0002] With the advancement of science and technology and the continuous improvement of people's living standards, flat panel TVs have gradually replaced traditional CRT (cathode ray tube) TVs and become the mainstream of the TV market. There is a non-linear relationship between the modulation current of a traditional CRT and the gray level of the image. The gray level of the image is equal to the parameter a multiplied by the Gamma power of the modulation current I, which is called Gamma correction. The transmitted traditional TV signal and the actual gray level It is one-to-one correspondence according to the Gamma correction function, and can be directly displayed on the CRT display. However, the voltage of flat-panel TVs such as plasma and liquid crystal is linearly correspondi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/69H04N5/202
Inventor 刘宇轩何云鹏江显舟
Owner HISENSE VISUAL TECH CO LTD
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