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Degraded image restoration method and system

A technology for degrading images and images, applied in the field of image processing, can solve the problems of loss of image details, large amount of calculation, and unsatisfactory processing effects of degraded images, and achieve the effect of good clarity, high contrast, and good local detail recovery effect.

Active Publication Date: 2014-07-02
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Problems solved by technology

Two times of median filtering are used to calculate the cloud cover layer in the degraded image, resulting in the serious loss of some details of the image, and the calculation amount is relatively large. In addition, whitening balance, tone mapping and gamma correction techniques are used to improve color fidelity, which is suitable for severe weather. Some degraded image processing effects under certain conditions are not ideal

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  • Degraded image restoration method and system
  • Degraded image restoration method and system

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Embodiment Construction

[0063] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0064] see figure 1 , the degraded image restoration method 100 of this embodiment includes the following steps:

[0065] Step S110, acquiring a degraded image.

[0066] In cloudy weather, the image quality will be affected by the low-frequency interference signals and high-frequency interference signals of the atmospheric cover layer. The research shows that the main cause of image degradation comes from the low-frequency interference signals. The degraded...

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Abstract

The invention discloses a degraded image restoration method which comprises the steps of: obtaining a degraded image; establishing a mathematical model of the degraded image with respect to an atmosphere covering layer; obtaining an estimation matrix of the atmosphere covering layer for the degraded image by using singular value decomposition according to the mathematical model; calculating the atmosphere covering layer according to the estimation matrix; selecting an atmosphere optical matrix, operating to obtain a transmission coefficient matrix of the atmosphere covering layer; and solving a restored image according to the atmosphere covering layer and the transmission coefficient matrix. The mathematical model established in the degraded image restoration method includes a variable of the atmosphere covering layer, more accurate atmosphere covering layer and transmission coefficient are obtained through optimization calculation, and the restored image can have higher contrast. Whitening balance, tone mapping and gamma correction technologies are not used, but the degraded image restoration method has better local detail restoration effect on the degraded image, and better color fidelity and definition of a processing result. The invention also provides a degraded image restoration system.

Description

【Technical field】 [0001] The present invention relates to image processing technology, in particular to a degraded image restoration method and system. 【Background technique】 [0002] Today, the restoration technology of degraded images under severe weather conditions has become a research hotspot. However, the current image restoration method is either an improved algorithm after the introduction of image matting technology, or uses two median filters to calculate the atmospheric cover layer in the degraded image, resulting in a serious loss of image details, a relatively large amount of calculation, and White balance, tone mapping, and gamma correction techniques are also used to improve color fidelity and are less than ideal for some degraded images in harsh weather conditions. [0003] Method 1 uses the dark channel prior to dehaze a single image, which can handle color images and grayscale images, but the amount of calculation is very large. The second method uses med...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 章勇勤苗卉宋怡彪邱本胜刘新郑海荣
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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