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Method and equipment for adjusting brightness and contrast

A brightness adjustment and contrast technology, which is applied in the video field, can solve problems such as unguaranteed picture quality, exposure phenomenon, and difficulty in meeting users' viewing requirements, so as to improve the display effect and meet viewing requirements.

Active Publication Date: 2010-05-19
VIMICRO ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, in the PCTV in the prior art, after the television signal is received and decoded complicatedly, the picture quality displayed on the display cannot be guaranteed. Satisfy the viewing requirements of users

Method used

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  • Method and equipment for adjusting brightness and contrast
  • Method and equipment for adjusting brightness and contrast
  • Method and equipment for adjusting brightness and contrast

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Embodiment Construction

[0052] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. example. 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 scope of protection of the embodiments of the present invention.

[0053] The core idea of ​​the embodiment of the present invention is: based on the histogram statistical information of the input video field signal content, through adaptive brightness range adjustment and high-low end contrast adjustment, the dynamic range of the video signal is improved, so that the darker part of the image It becomes brighter and highlights more details, while ensuring that the brighter part...

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Abstract

The invention discloses method and equipment for adjusting brightness and contrast. The method comprises the following steps of: acquiring a pixel value of a brightness section in a column diagram of an input signal, judging whether the brightness of the input signal meets an adjusting condition or not according to the relationship between the pixel value of the brightness section in the column diagram and a preset threshold value; and when the brightness of the input signal meets the adjusting condition, adjusting the brightness of the input signal; acquiring a pixel value of a contrast adjusting section in the column diagram of the input signal, acquiring the contrast of the input signal according to a configured contrast acquiring formula, and adjusting the contrast of the input signal. The invention realizes an adaptive adjustment of the brightness and the contrast of a television signal received by a PCTV.

Description

technical field [0001] The invention relates to the field of video technology, in particular to a method and device for adjusting brightness and contrast. Background technique [0002] With the development of digital technology, it has become a fashion and trend to watch TV on a computer. At present, the technology to realize this function is mainly realized by a TV card / box. Compared with the TV, the realization principle of the TV card / box is relatively simple, which is only equivalent to the signal receiving, signal decoding and processing parts in the TV. Since the PC monitor is used as the terminal output, there is no need to associate the display screen part, so it is much simpler than the traditional TV. [0003] The cost of the TV card / box is low, and the price is cheap. Adding a TV card / box to the computer can meet the needs of users when the requirements are not high. However, the TV card / box has the disadvantage of being susceptible to interference, and the soun...

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Application Information

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IPC IPC(8): H04N5/57G09G5/00G09G5/10
Inventor 卢晓鹏
Owner VIMICRO ELECTRONICS CORP
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