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Image enhancement method, terminal device and storage medium

An image enhancement and image technology, applied in the field of image processing, to achieve the effect of increasing image contrast, eliminating excessive enhancement and texture loss, and eliminating image blur problems

Active Publication Date: 2020-01-17
JIMEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional Retinex method, the effect of image enhancement depends on the scale factor of the Gaussian function, which has certain limitations.

Method used

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  • Image enhancement method, terminal device and storage medium
  • Image enhancement method, terminal device and storage medium
  • Image enhancement method, terminal device and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The enhancement effect of single-scale Retinex depends on the scale factor σ. When the value of σ is large, the color fidelity effect is good, but the details are not obvious; when the value is small, the details are highlighted after enhancement, but the color fidelity effect is poor. Especially in areas with obvious local color changes, there is a "Halo phenomenon" after the image color is enhanced. In order to make up for the defects of the algorithm, an embodiment of the present invention provides an image enhancement method, such as figure 1 As shown, it is a flow chart of the image enhancement method described in the embodiment of the present invention, and the method includes the following steps:

[0030] S1: Construct a bilateral filtering Retinex model.

[0031] The single-scale Retinex model (SSR) is a theoretical method for the calculation of color constant visual image enhancement based on the characteristics of human visual perception. In the definition ...

Embodiment 2

[0089] The present invention also provides an image enhancement terminal device, including a memory, a processor, and a computer program stored in the memory and operable on the processor. When the processor executes the computer program, the implementation of the present invention is realized. Steps in the above method embodiment of Example 1.

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Abstract

The invention relates to an image enhancement method, a terminal device and a storage medium. The method comprises: starting from incident component estimation, performing convolution operation on animproved bilateral filtering function and an input image to estimate an incident light component, so that edge signals of the image are reserved, and a filtering effect is achieved; performing downsampling by using a Gaussian-Laplace pyramid to obtain images of different scales of the filtered image, performing image enhancement operation on the images of different scales respectively, and finallyperforming reconstruction through the Gaussian-Laplace pyramid to obtain a final enhanced image. According to the invention, the image contrast can be effectively enhanced, and the color of the processed image conforms to the human eye observation effect.

Description

technical field [0001] The present invention relates to the field of image processing, in particular to an image enhancement method, terminal equipment and a storage medium. Background technique [0002] The existing common methods of image enhancement mainly include histogram equalization, methods based on haze removal and logarithmic image processing (LIP) model. In addition, Retinex-based methods and their improved methods are gradually proposed, such as single-scale Retinex algorithm (SSR), multi-scale Retinex (MSR) and MSR with color restoration (MSRCR) algorithms. In the traditional Retinex method, the effect of image enhancement depends on the scale factor of the Gaussian function, which has certain limitations. Contents of the invention [0003] In order to solve the above problems, the present invention proposes an image enhancement method, a terminal device and a storage medium. [0004] The specific plan is as follows: [0005] An image enhancement method, co...

Claims

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T2207/10024G06T2207/20192G06T5/73G06T5/90G06T5/70
Inventor 周海峰林昌陈武蔡国榕陈景锋陈清林王佳宋佳声张谅谢祎张兴杰焦健
Owner JIMEI UNIV
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