Underwater image enhancement method based on color correction and three-interval histogram stretching

A histogram stretching and color correction technology, applied in the field of image processing, can solve the problem that image information is difficult to restore
CN112419210APending Publication Date: 2021-02-26DALIAN MARITIME UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
DALIAN MARITIME UNIVERSITY
Publication Date
2021-02-26

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Abstract

The invention provides an underwater image enhancement method based on color correction and three-interval histogram stretching. The method comprises steps of performing color correction processing ona source image, processing the source image in an R channel, a G channel and a B channel by adopting a three-interval histogram equalization method, stretching pixel values of a single channel, performing threshold selection and separating three sub-intervals, and finishing three-interval equalization operation to obtain an enhanced image of three-interval histogram equalization; and performing linear weighted fusion on the image after subinterval linear transformation and the three-interval histogram equalization image to reconstruct a final defogged image. According to the method, a histogram equalization method based on multiple intervals is utilized to perform more accurate division on the single-channel histogram of the source image, perform histogram equalization on the single interval and perform linear fusion with the image after color correction processing so that dark details of the source image can be better displayed, noise can be reduced and image defogging can be realized.
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Description

technical field

[0001] The present invention relates to the technical field of image processing, in particular to an underwater image enhancement method based on color correction and three-interval histogram stretching. Background technique

[0002] The development and utilization of marine resources relies on underwater images, which are usually captured by underwater cameras and underwater robots. Due to the absorption and scattering of light, underwater images have problems such as low contrast and color cast, which cause image degradation and make underwater images difficult to analyze. Common factors that affect decay rates are water temperature and salinity, and the type and amount of suspended particles in the water. Severe deterioration makes image information difficult to recover. Therefore, finding an effective solution to restore the color and contrast of underwater images is a very challenging task.

[0003] According to research, underwater augmentation techn...

Claims

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