Typhoon cloud picture enhancement method

A typhoon and cloud map technology, applied in image enhancement, image analysis, image data processing and other directions, can solve the problems of not taking into account the difference of image prior information, not taking into account the noise of typhoon images, and unable to adapt to local grayscale distribution, etc. The effect of protecting image edges and details, protecting image structure and details, and avoiding over-enhancement and saturation artifacts

Active Publication Date: 2019-08-27
NANJING UNIV OF INFORMATION SCI & TECH
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AI Technical Summary

Problems solved by technology

The traditional histogram equalization algorithm can enhance degraded typhoon cloud images, but it does not take into account the noise in the typhoon image transmission process, which may strengthen the noise during the enhancement process
The contrast adaptive histogram equalization algorithm overcomes the defect that the histogram equalization algorithm cannot adapt to the local gray distribution, but after equalization, local over-enhancement will occur
Traditional image enhancement methods directly process the prior information of the entire image without considering the difference in prior information between the low and high frequencies of the image, and it is easy to lose some detailed information

Method used

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Embodiment Construction

[0034] The present invention proposes a new typhoon image enhancement method, which first decomposes the original typhoon image into a base layer and a detail layer, which can better protect image edges and details while effectively removing noise; The advanced histogram equalization algorithm realizes the improvement of image brightness and contrast, and removes saturation artifacts at the same time; finally, the enhanced base layer and detail layer are fused by using Laplacian pyramid, which can effectively protect the edge information of the image to achieve better enhancement effect.

[0035] Such as figure 1 Shown, the typhoon cloud map enhancement method of the present invention, concrete steps are as follows:

[0036] Step1: Use simple and efficient guided filtering to perform edge protection and denoising on the original degraded typhoon image I, and obtain the base layer B. Use D=I-B to obtain the detail layer D.

[0037] Step2: Use the modified histogram equalizat...

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Abstract

A typhoon cloud picture enhancement method provided by the invention is characterized in that by decomposing an original typhoon image into a base layer and a detail layer, the image edges and detailscan be better protected, and the noise can be effectively removed; by using a corrected histogram equalization algorithm for the base layer and the detail layer, the brightness and contrast of the image are improved, and the saturated artifacts are removed at the same time; and finally, the enhanced base layer and detail layer are fused by adopting a Laplacian pyramid, so that the image edge information can be effectively protected to achieve a better enhancement effect.

Description

technical field [0001] The present invention relates to meteorological cloud image processing, and is a typhoon cloud image enhancement method based on decomposition-processing-fusion. Background technique [0002] Typhoons bring various disasters and damages, which are characterized by strong suddenness and great destructive power, and have caused huge economic losses to many coastal cities in our country. Typhoon information can be effectively obtained through satellite cloud images. However, low visibility and contrast, blurred structural details, and degradation problems such as noise and artifacts are prone to occur in the imaging process of typhoon cloud images. [0003] Improve the brightness and contrast of typhoon cloud images, enhance the structural details of degraded typhoon cloud images, effectively remove noise and artifacts, and achieve ideal results in subsequent processing and applications. The traditional histogram equalization algorithm can enhance degrad...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T5/002G06T5/007G06T2207/10032G06T2207/20016G06T2207/20192G06T2207/30192Y02A90/10
Inventor 庄培显郭彭浩戴于翔熊佳颖
Owner NANJING UNIV OF INFORMATION SCI & TECH
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