Fire hazard early warning method based on video image
A video image and fire early warning technology, applied in fire alarms, alarms, instruments, etc., can solve problems such as inability to respond to fire, easy aging of fire detectors, failure to reach thresholds, etc.
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[0029] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0030] Such as figure 1 As shown, the present invention provides a kind of fire early warning method based on video image, comprises the following steps:
[0031] Step one 101, collecting video images to obtain video frames;
[0032] Step 2 102, selecting 1000 flame samples in the video frame; 1000 smoke samples and 4000 non-smoke and non-fire negative samples to generate pre-check values;
[0033] Step 3 103, taking one frame every 10 frames for the video frame to generate a detection frame; the frame rate of the video frame in the step 3 is 25 frames / second.
[0034] Step four 104, calculating the flame feature value generated by each pixel in the detection frame; wherein, the flame feature value is used to represent the spatio-temporal feature of the video image block through the time-domain normalized covariance descriptor.
[0035] R i,j,n =Red(i,j,n),
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