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.