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Image processing method and device

An image processing and image brightness technology, applied in the field of image processing, can solve the problems of obvious noise, difficult balance, image gradation and arc, etc., to achieve the effect of low complexity and noise amplification suppression

Active Publication Date: 2019-11-01
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the CLAHE algorithm is difficult to balance the relationship between contrast amplification and noise suppression at this time. For example, the image contrast and brightness have been improved to the level of user satisfaction, but at the same time there may be obvious noise, image gradation and arcs, etc. question

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments. 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.

[0025] The invention provides an image processing method, such as figure 1 As shown, the method includes:

[0026] S11. Calculate the pixel gradient value of each pixel in the brightness component of the image to be processed, and count the gradient histogram corresponding to the pixel whose gradient value is smaller than the first threshold...

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Abstract

The invention provides an image processing method and device. Flat region extension and self-adaptive flat region pixel detection are added into a CLAHE algorithm; the amplitude of the brightness histogram of the rectangular area where the flat area pixels are located is modified to be a specific value; therefore, the contrast ratio of the pixel with the amplitude being the specific value after histogram equalization processing is kept unchanged, so that noise amplification can be well suppressed and problems of color gradation and arc and the like of the image can be avoided while the local contrast ratio and brightness of the image are enhanced in a self-adaptive manner.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image processing method and device. Background technique [0002] During the use of mobile phones, users often need to watch the mobile phone screen under strong ambient light, such as strong outdoor sunlight or strong indoor lighting. Due to the strong ambient light, the mobile phone screen reflects more ambient light, resulting in the The visibility of the content displayed on the mobile phone screen is reduced. At this time, users often increase the backlight brightness of the mobile phone screen, which can alleviate this problem in many cases, but the maximum brightness value of some mobile phone screens is low. Even if the backlight brightness is increased to the maximum value, the image still cannot be seen clearly. In addition, increasing the brightness of the screen backlight will significantly increase the power consumption of the mobile phone and re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T5/40
CPCG06T5/40G06T2207/20012G06T5/94G06T5/70
Inventor 韦虎
Owner SPREADTRUM COMM (SHANGHAI) CO LTD