Early-stage smog video detecting method capable of immunizing false alarm in dynamic scene

A technology of dynamic scenes and smoke, which is applied in closed-circuit television systems, fire alarms and instruments that rely on smoke/gas effects, and can solve problems such as high false alarm rate and low detection robustness

Inactive Publication Date: 2010-06-16
ZHEJIANG SCI-TECH UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] However, the existing video detection technology has fatal defects such as high false alarm rate and low detection robustness in dynamic scenes.

Method used

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  • Early-stage smog video detecting method capable of immunizing false alarm in dynamic scene
  • Early-stage smog video detecting method capable of immunizing false alarm in dynamic scene
  • Early-stage smog video detecting method capable of immunizing false alarm in dynamic scene

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Embodiment Construction

[0027] The detection principle of the present invention is to use computer vision technology and false alarm immune algorithm rules to pass a series of filtering judgments on the regional changes in the captured image sequence. Automatically determine that a smoke event has occurred. Regardless of whether the surveillance camera is placed 10m or 100m away, it does not need to wait for the smoke to reach the detector, and can immediately detect its characteristic signal at the initial stage of smoke generation, achieving the preventive effect of early monitoring. This technology is especially suitable for fire monitoring in the aforementioned large places, and is used in toxic and harmful places for automatic monitoring of hazardous chemical leakage based on visual principles.

[0028] In the present invention, the early smog video detection method capable of being immune to false alarms in a dynamic scene is realized on a smog video detection system, which includes an IP netwo...

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Abstract

The invention discloses an early-stage smoke video detecting method which is immune to the false alarm in a dynamic scene. A turntable drives an IP web cam to intermittently rotate along the horizontal direction, and temporarily stops after rotating for each IP web cam visual angle; the video image data of the monitored scene are collected by the IP web cam, and are converted and transmitted to amonitoring microcomputer through an optical-electrical converter and an Ethernet; the monitoring microcomputer carries out the study and the cumulative evidence analysis to the video image data, monitors the dynamic background of the monitored scene, and judges and analyzes if the smoke is truly available in the monitored scene; and an alarm is triggered if the smoke is determined to be available.The invention overcomes the defects of the prior art that the false alarm rate under the opened dynamic scene is high, the detection robustness is low, and the like, and can correctly detect out theearly-stage smoke within 4-6 seconds.

Description

technical field [0001] The invention belongs to the field of computer digital image processing, and relates to video image acquisition technology, video image enhancement technology, video image segmentation technology, image compression technology, and video image multi-thread processing technology; in particular, it relates to a technology that can prevent false alarms in dynamic scenes Early smoke video detection method. Background technique [0002] In order to prevent fires and leakage of dangerous chemicals, the existing technologies are roughly divided into: suction smoke detectors, single-point smoke detectors (ion smoke detectors, photoelectric smoke detectors), projection beam smoke detectors , reflective beam smoke detectors, air sampling smoke detectors, radiant energy-sensing smoke detectors (ultraviolet smoke detectors, infrared smoke detectors, spark ember smoke detectors), single-point analog detectors for image pairs, etc. The detection principle is based o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B17/10G06K9/00H04N7/18
Inventor 周平姚庆杏钟取发
Owner ZHEJIANG SCI-TECH UNIV
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