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A Fast Video Dehazing Method

A video and fast technology, applied in the field of video processing, can solve problems such as difficulty in meeting the requirements of video implementation and complex calculation of image dehazing algorithms, and achieve the effect of avoiding sorting operations, reducing the amount of calculation, and simplifying the calculation method.

Active Publication Date: 2020-05-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Description
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Problems solved by technology

Theoretically, the video defogging algorithm is based on the image algorithm, and each frame of the video image is individually defogged, and then the processed images are arranged in order to reconstruct the video, and the video defogging can be completed. However, the image defogging algorithm The calculation is complicated, and it is difficult to meet the implementation requirements of the video

Method used

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  • A Fast Video Dehazing Method
  • A Fast Video Dehazing Method
  • A Fast Video Dehazing Method

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Embodiment Construction

[0027] Taking a certain type of FPGA system as an example, the system processes video signals with a resolution of 1024×768 and a frame frequency of 60Hz. When calculating the dark channel map, take a pixel as the center and search the surrounding 3×3 pixels, α=3, β=1 / 3. Such as image 3 and 4 As shown, a fast video defogging method includes the following steps:

[0028] (1) Gather a frame of image, save its data into the frame memory, set the loop variable i=1, k=1;

[0029] (2) Assuming that the minimum gray value of a pixel RGB three-channel is min(x), the maximum, minimum and average values ​​of all pixels min(x) in the frame image are respectively g max , g min , g mean , to satisfy min(x)≥g 0 The maximum gray value of all pixels in RGB three channels is atmospheric light A; where

[0030]

[0031] (3) The dark channel value Dark(x) whose minimum value is the dark channel value Dark(x) of x in the min(x) of 3×3 pixels around the pixel x is the center, calculate ...

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Abstract

The invention discloses a fast video defogging method, which sets the conditions for atmospheric light recalculation, simplifies the calculation method, avoids sorting operations, reduces the amount of calculation, and improves the operating efficiency of the defogging algorithm; and sets up a dark channel Under the conditions for graph recalculation, a correction method for dark channel graphs is designed, which reduces the amount of calculation and improves the efficiency of the defogging algorithm.

Description

technical field [0001] The invention relates to the technical field of video processing, in particular to a fast video defogging method. Background technique [0002] Videos taken under fog and haze conditions will be affected by the atmospheric environment, resulting in degradation and distortion. These videos cannot reflect the information of the real scene. Video defogging is to remove the interference of smog and haze through certain technical processing, restore the detailed information of the video, and obtain a video with good visual effects. Theoretically, the video defogging algorithm is based on the image algorithm, and each frame of the video image is individually defogged, and then the processed images are arranged in order to reconstruct the video, and the video defogging can be completed. However, the image defogging algorithm The calculation is complicated, and it is difficult to meet the implementation requirements of the video. In conclusion, video needs a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
CPCG06T2207/10016G06T5/73
Inventor 贾银亮张驰宇梁康武王平
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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