Video image stripe detection method and device, and computer readable storage medium

A technology of video image and detection method, which is applied to computer components, calculations, instruments, etc., and can solve problems such as low efficiency and poor robustness

Pending Publication Date: 2021-10-29
ZHEJIANG DAHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a video image stripe detection method and device, and a computer-readable storage medium to at least solve the technical problems of poor robustness and low efficiency of video image stripe detection in the related art

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  • Video image stripe detection method and device, and computer readable storage medium
  • Video image stripe detection method and device, and computer readable storage medium
  • Video image stripe detection method and device, and computer readable storage medium

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Embodiment 1

[0037] figure 1 is a flow chart of an optional video image streak detection method according to an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0038] Step S102, performing compression processing on the video texture map to obtain a mask image, wherein the video texture map is an image obtained after preprocessing the video image.

[0039] Step S104, performing quantization processing on the continuous smooth regions in the mask image, and determining the projection variances of the quantized images in different directions respectively.

[0040] Step S106, counting the abnormal bright spots in the image spectrum of the continuous smooth area, wherein the abnormal bright spots are bright spots with a frequency lower than a preset frequency.

[0041] Step S108, based on the projection variance and the abnormal bright spot, determine the streak detection result of the video image.

[0042] Through the above steps, t...

Embodiment 2

[0076] In the embodiment of the present invention, the periodic typical characteristic of streak interference is fully utilized, and at the same time combined with space domain and frequency domain analysis, the influence of various factors on streak detection is minimized. First extract the chrominance component of the video frame image, obtain its spectrum image through discrete Fourier transform, and design an algorithm to detect abnormal points in the spectrum image to judge whether there is stripe interference, and then establish a global filtering model through the texture features of the picture, Ease the influence of the complex texture of the image on stripe detection as much as possible. After obtaining the smooth stripe estimation area, the gradient projection variance of the local area in the x and y directions is calculated in blocks to determine the direction of the stripes. After that, the detection results are synthesized in two stages. Evaluates the image for t...

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Abstract

The invention discloses a stripe detection method and device for a video image and a computer readable storage medium. The detection method comprises the steps: compressing a video texture image to obtain a mask image, wherein the video texture image is an image obtained after a video image is preprocessed; carrying out quantization processing on a continuous smooth region in the mask image, and respectively determining projection variances of the quantized image in different directions; counting abnormal bright spots in the image spectrum of the continuous smooth area, the abnormal bright spots being bright spots lower than a preset frequency; and determining a stripe detection result of the video image based on the projection variance and the abnormal bright spot. According to the invention, the technical problems of poor robustness and low efficiency of video image stripe detection in the prior art are solved.

Description

technical field [0001] The present invention relates to the technical field of video image processing, in particular to a video image stripe detection method and device, and a computer-readable storage medium. Background technique [0002] With the promotion of smart city construction across the country, every large city will generate a large amount of video surveillance data every day. However, in actual use, the video surveillance system often has a large control area and long working hours, so the surveillance video is easily disturbed by stripes. At the same time, there are great differences in the types of stripe interference, (for example, the common ones are horizontal stripes, column stripes, oblique stripes, thick stripes, thin stripes and periodic stripes), and their causes are often different (for example, power frequency interference, internal voltage difference, etc.) balance, current imbalance, transmission, image sensor deviation, system noise or vibration, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/38G06K9/40G06K9/44G06K9/46G06K9/48G06K9/62
CPCG06F18/24
Inventor 李远沐熊剑平
Owner ZHEJIANG DAHUA TECH CO LTD
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