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Underwater image enhancement method combining multi-channel equalization and multi-scale fusion

A multi-scale fusion and underwater image technology, which is applied in image analysis, image data processing, instruments, etc., can solve the problems of not being able to adapt to various underwater degradation scenarios, the red channel contains less information, and the contrast is low. Adaptability, improve image clarity, improve image contrast and brightness effects

Pending Publication Date: 2022-07-29
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0004] Common image enhancement methods cannot adapt to a variety of underwater degradation scenarios; common image enhancement methods are difficult to improve underwater degradation image color distortion, low contrast, low brightness and the red channel contains the least information, etc.

Method used

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  • Underwater image enhancement method combining multi-channel equalization and multi-scale fusion
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  • Underwater image enhancement method combining multi-channel equalization and multi-scale fusion

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Embodiment Construction

[0031] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples, but the examples are not intended to limit the present invention.

[0032] As shown in the accompanying drawings, an underwater image enhancement method combining multi-channel equalization and multi-scale fusion, the specific steps of the method are as follows:

[0033] The present invention obtains and analyzes the histogram of the underwater degraded image and the R, G, and B three-channel result graphs in different scenarios, such as figure 1 The degraded images of different underwater scenes and their histograms and channel decomposition diagrams show that the image is bluish-green as a whole and has low contrast. Among them, the degraded images of different underwater scenes, their histograms and channel decomposition diagrams. (1) foggy scene...

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Abstract

The invention discloses an underwater image enhancement method combining multi-channel equalization and multi-scale fusion, and belongs to the field of underwater image enhancement, and the underwater image enhancement method combining multi-channel equalization and multi-scale fusion is realized by the following steps: step 1, performing multi-scale image enhancement; compensating the red channel by using the green channel and secondarily reinforcing the red channel through the mean value of the regional red channel; step 2, using a self-adaptive platform histogram to extend the gray scale range of the R, G and B three channels in a balanced manner and redistributing gray scale values; and step 3, carrying out multi-scale fusion on the brightness V (Value) components processed by the gamma algorithm, the GUM algorithm and the CLAHE algorithm. The method solves the problem of low definition of the underwater degraded image, improves color distortion, improves image contrast and brightness, has obvious enhancement effects on different scenes, and has good generalization adaptability.

Description

technical field [0001] The invention belongs to the field of underwater image enhancement, and more particularly relates to an underwater image enhancement method combining multi-channel equalization and multi-scale fusion. Background technique [0002] Underwater target recognition is a hot issue in the field of marine exploration. There are a large number of fish species in the ocean, and some fish are similar in shape and color and difficult to distinguish. Using artificial diving photography or underwater robots to collect data, and through long-term monitoring and observation, studying the changes of fish and other species in the waters during a certain period of time can provide a basis for the protection of biodiversity in the region. However, due to the complex underwater environment and the severe attenuation of light when propagating in the water, underwater images are prone to fogging, color distortion, low contrast and other phenomena and are not easy to identify...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06V10/20G06V10/30G06V10/80G06V20/05G06T7/90
CPCG06V10/20G06V10/30G06V10/803G06V20/05G06T7/90
Inventor 钱俊兵姜良伟全海燕郑志清
Owner KUNMING UNIV OF SCI & TECH
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