Latent fingerprint is an important material evidence in criminal cases, and the appearance of latent fingerprint is one ofthe key problems of physical evidence testing technology. Polarization imaging detection technology can realizenon-destructive detection of latent fingerprint. This paper introduces the basic principle of UV polarization imagingdetection, designs the UV polarization imaging detection system, and carries out UV polarization imaging experimentson four types of latent fingerprints such as perspiration fingerprint, oil stain fingerprint, blood stain fingerprint and graystain fingerprint, and obtains effective experiment. The UV polarization characteristics of latent fingerprints are analyzedand the polarization information adaptive selection fusion algorithm is proposed by using the difference andcomplementarity of different polarization parameters. The results show that the non-destructive detection of latentfingerprints is effectively realized by UV polarization imaging detection technology. Compared with general intensityimages, the contrast of polarized images is obviously improved, and the details are richer. It has practical value andresearch on nondestructive detection of latent fingerprints. significance.
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