Underwater image enhancement method based on structure-texture layering

A technology of underwater image and structure layer, applied in the field of computer vision

Active Publication Date: 2018-03-13
TIANJIN UNIV
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Problems solved by technology

Residue the noise to the texture layer, and then based on the proposed fog line model, accurately estimate the transmittance from the noise-free structure layer, and then perform enhancement processing, and then use the gradient residual minimization method t

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  • Underwater image enhancement method based on structure-texture layering
  • Underwater image enhancement method based on structure-texture layering
  • Underwater image enhancement method based on structure-texture layering

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[0077] First of all, in view of some of the shortcomings of existing underwater image enhancement methods, we propose a layered-based image processing method, the framework of which is shown in figure 1 . The first step is to perform color correction through histogram equalization. The second step is to use TV-L 1 (The total variation (TV energy) is used as a regular term for image decomposition (called ROF or TV-L 1 The optimization method of the model) method layered the image, and then enhanced and denoised the structure layer and texture layer respectively. Finally, the enhanced structure layer, texture layer and refined mask are reconstructed into the final result image. The following is the specific implementation method:

[0078] 1) Perform color correction on the captured image. By observing the color distribution histogram characteristics of underwater images such as figure 2 ,

[0079] 8) We see that because different light segments are absorbed and scattered at diffe...

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Abstract

The invention belongs to the field of computer vision, and provides good detail while improving image contrast, and the natural performance of the tone is kept while the noise is suppressed. An underwater image enhancement method based on structure-texture layering comprises the steps of firstly, carrying out color correction through histogram equalization, decomposing the image subjected to colorcorrection into a low-frequency structural layer and a high-frequency texture layer, leaving the noise on the texture layer, accurately estimating the transmission rate from the structural layer without noise based on a proposed fog line model to conduct enhancement processing, enhancing the texture layer by using a gradient residue minimization method, reconstructing the reinforced structural layer, the texture layer and the refined edge mask to form a final enhanced image through scaling, so that the problems that can not be solved through existing technology is solved. The method is mainlyapplied to underwater image enhancement and processing occasions.

Description

technical field [0001] The invention belongs to the field of computer vision and relates to an underwater image enhancement method based on structure-texture layering. Specifically, the image is divided into a high-frequency texture layer and a low-frequency structure layer through layering processing, which not only avoids the problem of amplifying the noise during the enhancement process, but also preserves the details and edges well, and improves the contrast and tone naturalness. , an underwater image enhancement method based on structure-texture layering. Background technique [0002] Clear and high-visibility underwater image analysis and recognition are of great significance to underwater survey, underwater video, military and other research. However, in complex underwater imaging environments, the image quality is severely degraded due to the influence of absorption and scattering by large suspended particles (like turbid particles in water) during transmission. Th...

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Application Information

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IPC IPC(8): G06T5/00G06T5/40
CPCG06T5/002G06T5/006G06T5/40
Inventor 杨敬钰王新燕岳焕景付晓梅侯春萍
Owner TIANJIN UNIV
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