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A video-based smoke detection method and device
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A pyrotechnic detection and pyrotechnic technology, applied in character and pattern recognition, image data processing, instruments, etc., can solve the problems of poor anti-interference ability, difficult to obtain good practical application effect, etc., to eliminate interference factors, accurate and efficient pyrotechnics The effect of detecting and reducing the probability of false alarms
Active Publication Date: 2017-05-10
ZTE ITS CO LTD
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Poor anti-interference ability makes it difficult to achieve better practical application results in real traffic environments
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Embodiment 1
[0058] refer to figure 2 , a video-based firework detection method provided by an embodiment of the present invention includes the following steps:
[0060] S02, detection of moving regions in the image
[0061] In this embodiment, a recursive background estimationalgorithm is used to detect the moving pixel area on the current frame image in the read video.
[0063] I(x, n) represents the pixel value of the nth frame image of the video at position x, use the formula (1) to estimate the background value B(x, n+1) at the position of the next frame,
[0064]
[0065] In the formula, B(x, n) is the estimated value of the background at the position in the previous step, parameter a is a positive real number close to 1, and the initial value B(x, 0)=I(x, 0). When the formula (2) is satisfied, the x pixel is considered to be in motion, otherwise the x pixel is considered to be stationary.
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Embodiment 2
[0118] refer to Figure 6 , the embodiment of the present invention also provides a video-based smoke detection device 600, including:
[0119] An image acquisition unit 610, configured to extract a predetermined number of continuous image frames from the acquired video;
[0120] The pixel detection unit 620 detects the moving pixels on each frame image and determines the moving pixel area therein;
[0121] A pyrotechnic color determination unit 630, configured to identify whether the color of each pixel in the moving pixel area is a pyrotechnic color, and obtain the pyrotechnic color area in which each frame image moves;
[0122] A time-domain analysis unit 640, configured to perform time-domain analysis on the moving fireworks color area in each frame image, and determine whether the moving fireworks color area has the time-domain characteristics of fireworks;
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Abstract
The invention discloses a firework detecting method based on a video, which comprises the steps of: (a) extracting a preset number of continuous image frames from video images; (b) detecting movement pixels on each frame image; determining movement pixel areas therein; (c) identifying whether each pixel color in the movement pixel areas is a firework color or not; obtaining areas of movement firework colors; (d) analyzing a time domain and a space domain of each area of the movement firework colors; judging whether the areas of the movement firework colors have the characteristics of the firework time domain and the space domain; and (e) synthesizing detecting judgment results of the previous steps for judging whether the video images have fireworks. The invention also provides a corresponding firework detecting device. According to the invention, accurate and efficient firework detection is realized based on the video images. The method can be applied for intelligent traffic systems, realizing automatic detection of accident traffic events of vehicle firing, smoking and the like, and the function of warning and the like, and greatly reducing the probability of warning by mistake.
Description
technical field [0001] The invention relates to the technical field of image processing and recognition, in particular to a video-based smoke detection method and device. Background technique [0002] In modern intelligent transportation systems, surveillance cameras have been widely used in urban roads, intersections and road sections of expressways. Scenario analysis based on surveillance video has become an indispensable module of intelligent transportation systems, and with the continuous advancement of technology, video-based scenario analysis has developed from a single analysis of running a red light to detection of various violations and even some special scenarios. Such as fire and smoke caused by traffic accidents. [0003] The video-based smoke and fire detection technology enables the intelligent transportation system to automatically complete identification and alarm when accidents such as vehicle fire and smoke appear on the camera-monitored road section, whic...
Claims
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