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An Improved Fast Dehazing Method

A fast, image technology, applied in the fields of digital image processing and intelligent transportation, it can solve the problem of not clearly indicating the real-time performance of high-definition video, and achieve the effect of good dehazing effect.

Active Publication Date: 2018-12-14
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the author only said that the simulation process for 432*283 images took 3.622s, and did not clearly indicate whether the high-definition video can achieve real-time performance on the DSP platform.

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] The technical solution of the present invention is divided into three parts: the first part is to carry out the average value down-sampling process to the YUV data, and convert it into a small image in RGB format; The transmittance of the small image is filtered by the maximum value; the third part is to avoid the blocking effect caused by downsampling by using bilinear interpolation and upsampling.

[0032] 1) YUV mean downsampling and converting to RGB format

[0033] The average downsampling process is performed on the YUV data to obtain an image in the YUV format after downsampling, and the image in the YUV format is converted into an image in RGB format.

[0034] 2) Solve the problem of black borders on sudden changes

[0035] In order to speed up the processing speed, mean value downsampling and bilinear interpolation upsampling ...

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Abstract

The invention discloses an improved rapid dehazing method, which is divided into three parts: the first part is to perform mean downsampling processing on YUV data and convert it into a small image in RGB format; the second part is to solve the problem of downsampling. To solve the problem of sudden blackening of edges, the small image transmittance is subjected to maximum filtering; the third part is to address the block effect caused by downsampling, using bilinear interpolation upsampling to avoid block effects. The method proposed by the present invention is aimed at 500W pixel YUV format video and can achieve real-time processing on a PC. The present invention proposes an effective improvement method for the black edge side effects caused by down-sampling and up-sampling, which can effectively avoid such side effects. In view of the blocking effect caused by downsampling, the present invention proposes bilinear interpolation upsampling to remove the blocking effect.

Description

technical field [0001] The invention relates to the technical fields of digital image processing and intelligent transportation, in particular to an improved fast defogging method. Background technique [0002] In recent years, environmental pollution has been very serious, especially more and more smoggy weather. Fog and haze are particles suspended in the air, whose scattering effect greatly reduces the image quality. The reduction of image quality directly affects the functions of outdoor image acquisition systems such as speedometers and driving recorders. It not only reduces the visibility of the image, but also causes difficulties in the subsequent image processing algorithms (such as license plate recognition, feature extraction, image analysis, etc.). Nowadays, most of the image acquisition devices are high-definition cameras, and the collected images are clear, but the data volume of the images is also large, and it takes a long time to process them. Therefore it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
CPCG06T2207/10016G06T2207/10024G06T2207/30236G06T2207/20182G06T5/00
Inventor 凌强朱学俊陈春霖李峰
Owner UNIV OF SCI & TECH OF CHINA