Color cast detection and image enhancement method for images after defogging

An image enhancement and image technology, applied in image enhancement, image data processing, instruments, etc., can solve problems such as image distortion

Inactive Publication Date: 2015-08-26
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, for foggy images, the removal of fog will also be accompanied by different degrees of image distortion, such as image color cast, so it is necessary to find an effective method for color cast detection and image enhancement of the image after defogging

Method used

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  • Color cast detection and image enhancement method for images after defogging
  • Color cast detection and image enhancement method for images after defogging
  • Color cast detection and image enhancement method for images after defogging

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Embodiment Construction

[0029] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0030] figure 1 The flow chart of image color cast detection and image enhancement after defogging is given as shown in the figure. To realize the detection and image enhancement of image color cast after defogging, the following links are the key points:

[0031] (1) Select the color shift threshold

[0032] Select the color shift threshold as 1.5. If the calculated color cast K cast ≥1.5, it is judged that the image has a color shift, enter step 2, the advanced gray world algorithm, and then use the improved single-scale Retinex algorithm to enhance the image; if K cast <1.5, enter step 3, it is considered that the image has no color shift, and the improved single-scale Retinex image enhancement algorithm is di...

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Abstract

The invention relates to a color cast detection and image enhancement method for images after defogging. Brightness radiation estimation is performed on the images after defogging by utilizing a guiding filter with low complexity and the edge preservation characteristic so that color cast of the images after defogging is corrected and the images are enhanced. Firstly, color cast detection is performed on the images; then a gray world method is performed on the images exceeding the color cast threshold value; and an improved single-scale Retinex method is performed on the images. With application of the method, color cast detection and image enhancement of the images after defogging are realized.

Description

[0001] The invention relates to an image color chip detection and image enhancement method after defogging in image defogging, and belongs to the field of image defogging. Background technique [0002] Today is a society with rapid development of informatization, and qualitative leaps have taken place in all aspects of information acquisition, processing, and dissemination. Image information can account for about 60% of the total amount of information. Images are the foundation of vision. People use images to record, obtain, and disseminate important information. It can represent various characters and events such as natural landscapes, cultural customs, and daily activities. The image is obtained by using various imaging equipment and observed through various methods and angles, forming a direct impact on the human eye and obtaining the entity of visual perception. Image quality also seriously affects the reading and judgment of information. [0003] The image obtained from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 张登银王奕权
Owner NANJING UNIV OF POSTS & TELECOMM
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