New Progress in the Research on the Stability of 3D Footprint Acquisition System and the Application of Personal Identification

The extraction of stereoscopic field footprint has always been a major problem in the field of physical evidence processing, and the application of optical measurement technology and computer technology to extract the footprint of the site has become the main trend of footprint extraction analysis. Although the existing on-site stereoscopic footprint instruments are relatively numerous, the reliability and the stability need to be tested. Therefore, the system stability test of the 3D stereoscopic footprint acquisition instrument is a prerequisite method for instrument application. By verifying the stability of the instrument's effects, obtaining a reliable method for collecting footprints with a 3D footprint acquisition instrument. And then by experimental and statistical analysis of the stability of the three-dimensional footprint left during walking with pseudo-color pictures and indentation, summarizing the phenomenon of stable features in different footprints produced by the same person and realizing the comparison and differences of the footprints of different individuals. It seems to use the three-dimensional footprint acquisition system to collect on-site footprints or even during the subsequent detection and identification applications, which is of great significance to carry out the personal identification technology based on the biometric characteristics of the three-dimensional footprint in the future.