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조두희 ( Cho Do Hee ),하동환 ( Har Donghwan ) 현대사진영상학회 2017 현대사진영상학회논문집 Vol.20 No.2
This study uses infrared-polarization technology to read questioned documents that use two or more writing instruments. In order to maximize the effect of polarization phenomenon, we propose a new shooting method. This method adjusts the incident angle of the light source to +55° and the camera angle to -55° based on the target. As a result of the experiment, we could distinguish the writing instrument `s response more finely than the conventional method.