Image tone dynamic adjustment method and apparatus based on partial block

An image tone and dynamic adjustment technology, applied in the field of image processing, can solve the problems of poor preservation of image details, high algorithm complexity, and high hardware cost

Active Publication Date: 2018-05-04
FUZHOU ROCKCHIP SEMICON
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Problems solved by technology

[0004] To this end, it is necessary to provide a technical solution for dynamic adjustment of image tone based on local blocks, in order to solve the problem of high algorithm complexity, large amount of calculation, high hardware cost and low image detail in the existing wide dynamic range technology when processing images. Can not be well preserved and other issues

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  • Image tone dynamic adjustment method and apparatus based on partial block
  • Image tone dynamic adjustment method and apparatus based on partial block
  • Image tone dynamic adjustment method and apparatus based on partial block

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[0062] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0063] figure 1 What is described is a schematic diagram of an apparatus for dynamically adjusting image tone based on partial blocks related to an embodiment of the present invention. exist figure 1 Among them, the camera 110 is an electronic component that can be installed on electronic devices such as video cameras, mobile phones, and tablets, and has the function of collecting image data. The image 120 is image data collected by the camera 110 , including one or more frames of images or videos. The image processing chip 130 (that is, the device for dynamically adjusting image tone based on local blocks mentioned in the present invention) can receive the image 120 collected by the camera 110 , perform corresponding optimization p...

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Abstract

The present invention discloses an image tone dynamic adjustment method and apparatus based on a partial block. The method comprises the following steps: firstly, according to a pixel value of a current pixel on an image, obtaining a luminance component value corresponding to the current pixel; obtaining a background luminance value corresponding to the current pixel according to the background area of the current pixel on the image; obtaining an average luminance value corresponding to the current pixel point according to the neighboring area of the current pixel on the image; according to the background luminance value and the average luminance value corresponding to the current pixel, obtaining a pixel gain coefficient corresponding to the current pixel point; and carrying out gain processing on the pixel value of the current pixel by using the pixel gain coefficient corresponding to the current pixel. By virtue of the method disclosed by the present invention, the local contrast ofthe image can be effectively improved and the details of the image can be well preserved, and at the same time, compared with the existing algorithms, the complexity of the algorithm is relatively simple, and image processing efficiency can be improved in a facilitated manner.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method and device for dynamically adjusting image tone based on local blocks. Background technique [0002] Luminance is the human eye's perception of illuminance (photometric quantity), generally in cd / m2. Dynamic range (dynamic range) is the ratio of the highest brightness to the lowest brightness. When observing an object, the human eye can adaptively adjust very bright or very dark areas in the scene. Areas that are too dark are displayed simultaneously, resulting in partial distortion of the captured image. [0003] Currently, the above-mentioned problems are solved by adopting a wide dynamic range (wide dynamic range, WDR for short) technology. Specific algorithms include global mapping algorithm, local histogram algorithm, Retinex theory, etc. These algorithms have a large amount of calculation and high complexity, which is not conducive to hardware implementation, and ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/00G06T5/00
CPCG06T3/0025G06T5/007G06T5/008
Inventor 何平征戴正展林奇奇
Owner FUZHOU ROCKCHIP SEMICON
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