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

Abstract

The invention relates to a fusion method of a passive millimeter wave image and a visible light image in a human body security inspection. The method comprises the following steps of: determining a low brightness temperature suspicious target such as a metal in an original millimeter wave image and displaying the low brightness temperature suspicious target as a dark color area; Suspicious objectswith high brightness temperature, such as liquid, are displayed as bright color areas, and the suspicious objects in the final fusion image are represented as bright areas; For dark suspicious targets, After wavelet decomposition of millimeter wave image and visible image, In the low-frequency coefficient matrix of the fusion image, the target region comes from the low-frequency coefficient matrix of the millimeter-wave image, the non-target region comes from the low-frequency coefficient matrix of the visible image, the high-frequency coefficient matrix of the fusion image is the high-frequency coefficient matrix of the original visible image, and finally the fusion image is obtained by wavelet transform. For the bright suspicious target, the fixed threshold segmentation is used to obtain the millimeter-wave image suspicious target, and the final fusion image is obtained by region selection fusion: the target region is from the millimeter-wave image, and the non-target region is fromthe visible image.

Description

technical field [0001] The invention provides a fusion method for millimeter-wave images and visible light images, and in particular relates to a fusion method for passive millimeter-wave human body security inspection images and visible light images, which belongs to the field of millimeter wave human body security inspection. Background technique [0002] With the escalation of terrorism and violent activities around the world, countries around the world have put forward higher and higher requirements for the detection of hidden prohibited items in the human body. Compared with traditional X-ray and infrared imaging, millimeter wave imaging can not only detect metal objects hidden under human clothing, but also detect dangerous goods such as explosives, gasoline, and ceramic knives. Compared with active millimeter-wave imaging technology, passive millimeter-wave imaging has the advantages of fast imaging speed, no radiation to the tested personnel, and no violation of the ...

AI Technical Summary

Problems solved by technology

[0004] The technical solution of the present invention is to overcome the deficiencies of the prior art, and provide a fusion method of passive millimeter-wave images and visible light images in human body security inspection, through the fusion of millimeter-wave images and visible light images, the amount of scene information is enhanced, the target is highlighted, and It is beneficial to more accurately identify hidden dangerous objects, realize positioning, and make up for the shortcomings of millimeter wave images such as low resolution, high noise level, and poor readability; at the same time, it ensures the stability and effectiveness of the fusion algorithm

Images