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A method and device for image green channel balance

A channel balance, image technology, applied in the field of image processing, can solve the problems of texture loss, blurred image boundary, block effect, etc., to achieve the effect of protecting image edge details and maintaining image resolution

Active Publication Date: 2022-07-01
SHANGHAI FULLHAN MICROELECTRONICS
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Problems solved by technology

[0005] In order to overcome the deficiencies in the above-mentioned prior art, the purpose of this application is to provide a method and device for image green channel balance, which can solve the problem of block effect in adjacent areas in the existing green channel balance scheme, resulting in blurred image boundaries and Problems such as texture loss

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  • A method and device for image green channel balance
  • A method and device for image green channel balance
  • A method and device for image green channel balance

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Embodiment Construction

[0060] The embodiments of the present application will be described below with reference to specific examples and accompanying drawings, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific examples, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the spirit of the present application.

[0061] In order to solve the above problems existing in the existing image green channel balance solution, the present application provides another method and apparatus for image green channel balance. Among them, image clarity and green channel balance are inherently contradictory. Existing algorithms generally lose a certain amount of image resolution while solving the image green channel imbalance, and ...

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Abstract

The present application discloses an image processing method and device. The method includes: acquiring a Bayer image, dividing the Bayer image into multiple image blocks, and calculating the absolute pixel value of each image block according to the pixel values ​​of GR and GB in each image block. Value Diffavg; calculate the gradient of the pixel value of the green pixel of the same channel in the sliding window to obtain the image gradient grad; calculate the correction coefficient alpha according to the corresponding grad and Diffavg; according to the green pixel of the same channel and the green pixel of the different channel in the sliding window Calculate the mean difference offset of the pixel value of , and perform green channel balance correction on the green pixel to be corrected according to alpha and offset to obtain the corrected Bayer image. The present application can solve the problems existing in the existing solution, such as block effect in adjacent regions, blurred boundary and texture loss.

Description

technical field [0001] The present application relates to the technical field of image processing, and in particular, to a method and apparatus for balancing the green channel of an image. Background technique [0002] Due to the inherent defects of the imaging principle of the image sensor, the adjacent green channels GR and GB channels will produce different photosensitive intensities, that is, the green channel imbalance will be generated. Fake textures are produced after color interpolation, usually appearing as meshes in the image. In order to consider the image effect, the balance correction of the green channel is required in the image acquisition and processing link. [0003] At present, there are two main schemes for green channel balancing. The first is to calculate the mean difference of the green channel within a certain area of ​​the image, and then use the mean difference to perform balance correction on the green channel. However, this scheme is a statistic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/73
Inventor 朱俊玲田景军
Owner SHANGHAI FULLHAN MICROELECTRONICS
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