A self-adaptive tone mapping method and system

A tone-mapping and self-adaptive technology, applied in the field of data processing, which can solve the problems of resource consumption, cumbersome algorithm process, and inability to adjust adaptively, and achieve the effect of avoiding cumbersome process and avoiding low contrast.

Active Publication Date: 2021-11-23
合肥君正科技有限公司
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AI Technical Summary

Problems solved by technology

However, its shortcomings are: its form is relatively rigid, and it cannot be adaptively adjusted according to scene information, resulting in very low contrast when the algorithm processes most scenes.
However, its shortcomings are: the algorithm process is cumbersome, there are too many parameters, and it will consume a lot of resources to implement it through hardware.

Method used

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  • A self-adaptive tone mapping method and system
  • A self-adaptive tone mapping method and system
  • A self-adaptive tone mapping method and system

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Embodiment Construction

[0043] In order to further illustrate the features of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. The accompanying drawings are for reference and description only, and are not intended to limit the protection scope of the present invention.

[0044] Such as figure 1 As shown, this embodiment discloses an adaptive tone mapping method, including the following steps S1 to S5:

[0045] S1. Calculate the brightness of the scene where the source image is located, and normalize the brightness of the scene to obtain a normalized value of the brightness of the scene;

[0046] Specifically, step S1 includes the following subdivision steps:

[0047] Counting the histogram information of the Y channel of the source image to obtain the pixel value information of each grayscale region of the source image;

[0048] Analyzing the pixel value information of each grayscale area to obtain the brightness of the sce...

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Abstract

The invention discloses a self-adaptive tone mapping method and system, belonging to the technical field of data processing. The method includes calculating the brightness of the scene where the source image is located, and obtaining a normalized value of the brightness of the scene; according to the normalized value of the brightness of the scene, determining the The mapping parameter λ for the global tone mapping of the source image; using the global tone mapping algorithm, the source image is processed according to the mapping parameter λ, and the preliminary global mapping result L is obtained i,j , L i,j is the gray value I of the pixel at point (i, j) i,j The result processed by the global mapping algorithm; the local tone mapping algorithm is used to process the source image to obtain the mapping weight ω of each point in each local area i,j ; According to the mapping weight ω of each point i,j , the pixel gray value I of the corresponding point in the source image i,j and the corresponding preliminary global mapping result L i,j , to get the final mapping result. The invention overcomes the defects of global tone mapping and local tone mapping, and simplifies the mapping calculation process while improving the contrast of mapping results.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to an adaptive tone mapping method and system. Background technique [0002] Tone mapping technology is a method of compressing images in high dynamic range to the range that can be displayed by traditional display devices. After an image is processed by the tone mapping algorithm, it should be able to produce a subjective feeling consistent with the real scene. That is to say, in addition to compressing the dynamic range, tone mapping should also preserve the color, contrast, and details of the highest dynamic range image to the greatest extent. and other information. [0003] Currently, tone mapping techniques generally include two categories: global tone mapping algorithms and local tone mapping algorithms. Most of the global tone mapping algorithms have a nonlinear mapping function, and the same tone mapping curve is applied to each pixel of the image. The whole algori...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/40G06T7/90G06T11/00
CPCG06T5/40G06T11/001G06T7/90
Inventor 翟全
Owner 合肥君正科技有限公司
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