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Method and device for adjusting image brightness and contrast

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

Active Publication Date: 2017-06-06
GUANGZHOU BOGUAN TELECOMM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 adjusting image brightness and contrast
  • Method and device for adjusting image brightness and contrast
  • Method and device for adjusting image brightness and contrast

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Embodiment Construction

[0200] 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.

[0201] 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:

[0202] 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 adjusting image brightness and contrast, comprising the steps of: receiving RGB images and adjustment parameters, extracting RGB values ​​before image adjustment based on the received RGB images, and obtaining average brightness based on the RGB values ​​before image adjustment value; the RGB value before the image adjustment and the adjustment parameter are substituted into the relationship between the RGB value after the preset image brightness contrast adjustment and the RGB value before the image brightness contrast adjustment, and the RGB value after the image adjustment is calculated; wherein the The relational expression is calculated by the formula of RGB to HSV, the brightness and contrast adjustment formula in HSV space, and the formula of HSV to RGB; based on the adjusted RGB value of the image, the brightness of the RGB image is adjusted to obtain the adjusted RGB image; the output The adjusted RGB image is described above. The invention also discloses a device for adjusting image brightness and contrast.

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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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/64
Inventor 邹向群陈健生
Owner GUANGZHOU BOGUAN TELECOMM TECH LTD