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In criminal cases, the information collection and analysis of the scene plays an important role in solving cases. Handprint mark can be easily remaining and frequently occurring mark of criminals. It may occasionally be recognized as potential physical evidence during criminal investigations. The infrared thermal imager can fully collect the thermal radiation information of objects, so it is convenient to get the remaining heat source marks in the environment, and to obtain key information thatdoi:10.1109/access.2020.2979018 fatcat:iiecgx6jqzao7j5ho3x7dhbhee