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Improved rapid demisting method

A fast, high-format technology, applied in image data processing, instruments, calculations, etc., can solve problems such as not clearly indicating the real-time performance of high-definition video, and achieve a good effect of defogging

Active Publication Date: 2016-04-20
UNIV OF SCI & TECH OF CHINA
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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 demisting method. The method is divided into three parts: the first part involves performing mean-value down-sampling processing on YUV data and converting the YUV data into small graphs in an RGB format; the second part involves performing maximum-value filtering on small graph transmissivity for the purpose of solving the problem of abrupt change edge blacking caused by down-sampling; and the third part involves performing up-sampling by use of bilinear interpolation for the block effect caused by the down-sampling so as to prevent the block effect. The method brought forward by the invention can process a 5-million-pixel video in a YUV format in real time on a PC. An effective improvement method is brought forward for effectively prevent a black-edge side effect caused by the down-sampling and the up-sampling. The up-sampling by use of the bilinear interpolation is brought forward for removing the block effect generated due to the down-sampling.

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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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
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