Rapid tone mapping system and method based on multi-scale Gauss filters

A Gaussian filter and tone mapping technology, applied in the field of tone mapping, can solve the problems of low algorithm efficiency and difficult implementation, and achieve the effects of easy operation, reduced memory consumption and calculation time

Inactive Publication Date: 2016-08-03
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] At present, according to different processing methods, tone mapping algorithms are mainly divided into three categories: (a) spatially uniform operator (spatially uniform), also known as global mapping operator, which uses the same mapping curve to process all pixels of the image; ( b) The spatially varying operator (spatially varying), also known as the local mapping operator, means that each pixel of the image has its own mapping curve, which is related to its

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  • Rapid tone mapping system and method based on multi-scale Gauss filters
  • Rapid tone mapping system and method based on multi-scale Gauss filters
  • Rapid tone mapping system and method based on multi-scale Gauss filters

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[0041] Below in conjunction with accompanying drawing, the present invention will be further described:

[0042] figure 1 It is a schematic diagram of the functional structure of a fast multi-scale Gaussian filter-based tone mapping method in a preferred embodiment of the present invention, figure 1 , a fast tone mapping method based on multi-scale Gaussian filter, including multi-scale decomposition module 1, coarse layer module 2, detail layer module 3, fusion module 4, chroma processing module 5, gamma correction module 6 and terminal display module 7.

[0043] The multi-scale decomposition module 1 is used to construct a group of multi-scale Gaussian filters, and decomposes the high dynamic range image into a series of coarsening images and detail images at different scales; the coarsening layer module 2 is used for the high dynamic range image Perform multi-scale edge-preserving decomposition to obtain a series of gradually blurred coarsening images; the detail layer mo...

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Abstract

The invention relates to a rapid tone mapping system and method based on multi-scale Gauss filters. The system comprises a multi-scale decomposition module, a rough layer module, a detail layer module, a fusion module, a chroma processing module, a gamma correction module and a terminal display module. The multi-scale Gauss filters are used to decompose images of high dynamic range to obtain rough images and detail images; the fusion module combines the rough images with the detail images linearly to form novel images of low dynamic range; the chroma processing module compensates chroma information; and the gamma correction module uses gamma correction to compensate the nonlinear relation between input signals and output signals of a display system in advance. According to the invention, the image of high dynamic range can be effectively compressed, image information is effectively reserved, the algorithm efficiency is high, consumption time is short, and the tone mapping system and method are suitable for mobile phones.

Description

technical field [0001] The invention belongs to the technical field of tone mapping of high dynamic range images, and in particular relates to a high-efficiency tone mapping method based on a multi-scale Gaussian filter. Background technique [0002] Real scenes in nature can display brightness with a high dynamic range, and the human visual perception system is well adapted to this dynamic range. Optical digital imaging technology can use the imaging processor to convert natural light into digital signals and save them through storage media. Computer display devices use these digital signals to reproduce photographed natural scenes. Ultimately, it is required that the user can obtain visual perception consistent with direct observation of the real scene from the display device. The current low dynamic range image processing technology still cannot fully reproduce the real natural scene, and the high dynamic range image and tone mapping algorithm are the effective methods ...

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Application Information

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IPC IPC(8): G06T3/00
CPCG06T3/0012
Inventor 闫亚星陈乔松冉会琼刘晓董师周崔栋灿周冰玉卢大强
Owner CHONGQING UNIV OF POSTS & TELECOMM
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