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Method and device for regulating image brightness and contrast ratio

A technology of brightness contrast and image brightness, which is applied in the field of image processing, and can solve the problems of large computing resources, video image brightness contrast enhancement that cannot meet real-time needs, and large amount of computing.

Active Publication Date: 2015-04-01
GUANGZHOU BOGUAN TELECOMM TECH LTD
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Problems solved by technology

Therefore, a large amount of calculation is required in the whole process, and it takes up a large amount of computing resources, and the speed is extremely low. The brightness and contrast enhancement of video images is far from meeting real-time needs.

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  • Method and device for regulating image brightness and contrast ratio
  • Method and device for regulating image brightness and contrast ratio
  • Method and device for regulating image brightness and contrast ratio

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Embodiment Construction

[0201] 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 creative efforts fall within the protection scope of the present invention.

[0202] see figure 1 , is a schematic flowchart of the first embodiment of a method for adjusting image brightness and contrast provided by the present invention. The method for adjusting image brightness and contrast comprises steps:

[0203] S101. Receive an RGB image and an adjustment parameter, and extract an RGB value before image adjustment based on the received RGB image, and obtain an average brightness value based on the RGB value before image adjustment; ...

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Abstract

The invention discloses a method for regulating image brightness and contrast ratio. The method comprises the steps of receiving an RGB image and regulation parameters, extracting the RGB value before the image is regulated based on the received RGB image, and obtaining the average brightness value based on the RGB value before the image is regulated; substituting the RGB value before the image is regulated and the regulation parameters into a preset relational expression of the RGB value after the image contrast ratio is regulated and the RGB value before the image contrast ratio is regulated, and performing calculation to obtain the RGB value after the image is regulated, wherein the relational expression is obtained by calculating through a formula transforming the RGB to the HSV, a brightness and contrast ratio regulation formula and a formula transforming the HSV to the RGB; performing brightness regulation on the RGB image based on the RGB value after the image is regulated to obtain the RGB image subjected to regulation; outputting the regulated RGB image. The invention further discloses a device for regulating the image brightness and contrast ratio.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and device for adjusting image brightness and contrast. Background technique [0002] With the development and popularization of computer technology and image processing technology, the application of digital image processing is becoming more and more extensive. Color digital images can be represented by various color space models, such as RGB and HSV. in: [0003] RGB space model: a color model produced by the color mixing principle of three primary colors. The three primary colors are red, green, and blue, respectively represented by R, G, and B. Various colors in nature can be obtained by adding and mixing the three primary colors in different proportions. become. [0004] HSV model: A color model that is more in line with the visual characteristics of the human eye and has the advantage of bright color separation. H, S, V represent hue signal, saturation...

Claims

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Application Information

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IPC IPC(8): H04N9/64
Inventor 邹向群陈健生
Owner GUANGZHOU BOGUAN TELECOMM TECH LTD
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