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Laser beam irradiation detection device, laser beam irradiation detection method, and laser beam irradiation detection system
Laser beam irradiation detection device, laser beam irradiation detection method, and laser beam irradiation detection system
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机译：激光束照射检测装置，激光束照射检测方法和激光束照射检测系统
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摘要
A bandpass filter allows a light ray of a predetermined band including a wavelength band of a color of a laser beam, which is a target of detection, among light rays from a subject to pass therethrough. An imaging unit of a video camera captures the light ray passing through the bandpass filter. The controller analyzes a frequency for each brightness level of a video signal generated based on an imaging signal output from the imaging unit and detects a peak at which the frequency protrudes at a specific brightness level. The controller detects a trajectory of a straight light ray in a frame of the video signal. The controller detects that the laser beam is irradiated when the peak exists at a specific brightness level and the trajectory of the light ray exists in the frame.
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