This application involves a crime scene footprint photography and extraction method and extraction device that can photograph a first image of the footprint in the oblique light from a fixed angle, and a second image of the footprint in the diffuse reflected light from a fixed angle divide the first images brightness component V1 by the second images brightness component V2 to produce their brightness distribution ratio V3 and extract a third image corresponding to the brightness distribution ratio V3. According to the technical scheme of this application, the technology has a better image collection effect, and can provide better image materials for future footprint acquisition and identification, and can also remove the patterns of the footprint trace carrier, and leave only footprint images displayed clearly and cognizably. Moreover, the method is simple and the results are more accurate.
