Video image sea fog removal and clearing method

Abstract

The invention belongs to the field of video image enhancement, and particularly relates to a video image sea fog removal and clearing method which integrates frame difference method background estimation with the rapid single-frame sea fog removal algorithm based on edge detection and is used for an offshore aircraft rapid video image sea fog removal and clearing system. The video image sea fog removal and clearing method includes the steps of obtaining a sea fog video image, conducting sea fog removal and clearing on a single-frame sea fog image, and conducting sea fog removal and clearing on the video image. The video image sea fog removal and clearing method is suitable for all offshore aircrafts, and performance of visual systems of the offshore aircrafts in sea fog can be greatly improved. The operating speed is high, and sea fog removal and clearing can be conducted on the video image in real time in the sea surface scene. Compared with other algorithms, the rapid single-frame sea fog removal algorithm has a good edge keeping effect. The method has the advantages of being remarkable in fog removal effect and good in image restoration effect. The detecting performance, the tracking performance and the recognizing performance of targets in the later period can be effectively improved with sea fog removal and clearing as earlier stage processing on the visual systems.

Description

Technical field [0001] The invention belongs to the field of video image enhancement, and specifically relates to a video image for a sea-vessel rapid video image sea fog removal clarification system that combines frame difference method background estimation and edge detection-based fast single-frame sea fog removal algorithm Sea fog removal and clarification method. Background technique [0002] Video image sea fog removal technology belongs to image enhancement technology, the purpose is to enhance its visual effect, so that the processed video or image achieves high image clarity, good contrast, and easy target identification. my country has vast sea areas and long coastlines. Sea fog may appear all year round. Video image defogging technology is an important part of the collection and monitoring of surrounding environmental information by visible light visual sensors of ships on the sea. It is very important for both military and civilian purposes. Application prospects. [0...

AI Technical Summary

Problems solved by technology

[0008] (2) The concentration of sea fog is often relatively large, and generally the fog is not uniform;

[0009] (3) The background of the sea fog scene is simple, but it is often accompanied by the influence of waves, which is more complicated than the background of land video surveillance;

[0010] (4) The details and colors in the sea fog scene are not as rich as in the land scene

However, these methods have a good defog effect for land scenes and misty environments, but the effect is not particularly obvious for sea fog scenes, and these algorithms will have certain edge blurring and holo effects. If you use bilateral filtering or joint bilateral filtering for Edge preservation, although it will reduce the effect of edge blur to a certain extent, it will cause a significant increase in the amount of calculation

Moreover, most of the defogging methods currently researched are aimed at defogging a single image, and it is difficult to meet the real-time requirements for direct defogging of video frames.

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