A security inspection system and method based on a bandpass filter

Abstract

The invention discloses a safety check system and method based on band-pass filters. A filter wheel is driven by a drive motor, the rotating speed can be adjusted continuously or at certain step length, and the rotating speed adjustment range is 1-50 Hz; a surface imaging camera receives imaging light rays penetrating through the band-pass filters, begins exposure after receiving a trigger signal of an imaging controller and continuously outputs sequence images to an image acquiring and processing terminal; the image acquiring and processing terminal calculates reflection spectrum of targets in a scene according to the image sequences and determines the type of targets according to a preset target reflection spectrum database. Existing equipment and existing programs are used, the problems that the detection difficulty is high and dangerous liquids and safe liquids cannot be distinguished easily in the safety detection field are solved, and the labor detection workload is reduced.

Description

technical field [0001] The invention relates to the field of security inspection, in particular to a security inspection system and method based on a bandpass filter. Background technique [0002] In the case of frequent terrorist attacks at home and abroad, it is particularly important to check the security of personnel entering and leaving important places such as airports, ports, and fortresses or transportation departments such as stations, subways, and buses. The main targets of routine security inspections are guns, knives and other metal objects, and X-ray detectors can be used to achieve rapid detection and identification, while inspections for liquid dangerous goods such as gasoline and alcohol, and solid dangerous goods such as explosives and drugs rely on labor. The manual detection method is not satisfactory in terms of detection efficiency and missed detection rate, especially in the time period or place with a large flow of people, the contradiction between th...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a security inspection system based on band-pass filters, which solves the detection difficulties that exist in current detection systems and detection methods. Problems indistinguishable from safe liquid areas such as water, cola, milk, juice, etc.

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