Method and device for detecting smoke in video image sequence

A technology in video images and images, used in image analysis, image data processing, instruments, etc.
CN101794450AActive Publication Date: 2010-08-04NETPOSA TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
NETPOSA TECH
Publication Date
2010-08-04

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Abstract

The invention provides a method for detecting smoke in a video image sequence. The method comprises the following steps of: 1, calculating the optical flow direction of each pixel in an interframe difference image of a video image frame; 2, determining the type of the optical flow direction of each pixel according to the deviation between the optical flow direction of each pixel and the background direction at the same pixel position and calculating the integral value corresponding to each pixel based on the type of the optical flow direction of each pixel; 3, determining whether each pixel is a smoke point according to the integral value corresponding to each pixel; 4, obtaining an initial detection area formed by all the smoke points; and 5, judging whether the obtained initial detection area is a smoke area. The method has the advantages of avoiding background establishment, eliminating the influence of illumination, noise and background textures and improving the reliability of smoke detection.
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Description

technical field

[0001] The invention relates to image processing and video monitoring, in particular to a method and device for detecting smoke in video image sequences. Background technique

[0002] According to the law of fire occurrence, the appearance of fire smoke is earlier than that of open flame, so smoke detection technology is widely used in early warning of fire. Among smoke detection technologies, video-based smoke detection has become a research hotspot due to its advantages of non-contact and low cost.

[0003] US patent application US 2007 / 0019071A1 discloses a smoke detection method that uses background estimation to extract smoke regions in an image. The Chinese patent application with publication number CN 101059435A discloses a forest fire smoke detection method based on color CCD image analysis, which uses wavelet analysis and multi-feature fusion algorithm to detect smoke from the image. The above smoke detection methods simply use background segmentat...

Claims

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