A registration method of passive millimeter wave image and visible light image in human body security inspection

Abstract

The invention relates to a registration method of passive millimeter wave image and visible light image in human body security inspection, which is used for the registration of visible light and passive millimeter wave images in the millimeter wave security inspection. The registration relationship is determined as follows: firstly, the visual field boundary of the visible light image and the passive millimeter wave image is determined by a hand-held calibration light source at a specific distance, and the standard point image is saved; Then, considering the difference of angle of view betweenvisible and passive millimeter-wave images, the calibration points are optimized. Finally, the perspective and translation transformations of the passive millimeter-wave images are completed and theregistration parameters are saved on the basis of the visible image. At that same time, the calibration distance is limit to four distances of 2.0, 2.5, 3.0 and 3.5 m. In practical application, the range information is used to select the appropriate registration parameters, and the real-time registration output of visible and passive millimeter-wave images is achieved. The invention can realize real-time registration output of visible light and passive millimeter wave images in a millimeter wave fast security inspection system.

Description

technical field [0001] The invention relates to a registration method based on a passive millimeter wave image and a visible light image, in particular to an image registration method for a millimeter wave rapid security inspection system, which belongs to the technical field of computer graphics and is mainly used in passive millimeter wave human body security inspection. Registration of mmWave images with visible light images. Background technique [0002] With the development of millimeter wave detection technology, the security inspection system based on millimeter wave rapid imaging can quickly and accurately detect concealed contraband carried by non-cooperative targets, so it has been widely researched and applied, especially in airports, railway stations and large venues security check. [0003] Traditional security inspection systems mainly include metal detection gates, hand-held metal detectors, X-ray security inspection systems, etc., but metal detection systems...

AI Technical Summary

Problems solved by technology

Although the existing research results have achieved good registration results for the registration of visible light images and millimeter-wave images in their respective application scenarios, they have not considered the certain deformation characteristics of millimeter-wave images under different imaging distances.

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