浅论数码照相提取现场粉尘足迹

选用佳能G5照相机进行数码照相有利于提取犯罪现场粉尘足迹。根据分析实验拍照效果后发现,对拍照平面粉尘足迹影响较大的是配光方法。在实践中,拍照平面粉尘足迹配光方法主要有定向反射用光法、暗视场照明法和掠入射照明法。在拍照粉尘足迹过程中,应当注意使用传统的手动曝光方法和运用不同的配光方式,理顺配光与主客体之间的关系,尽可能使用掠入射照明法进行配光。

On Extraction of On-the-spot Dust Footprints by Digital Cameras

Canon G5 cyber shot-based photographic technology is conductive to extraction of on-the-spot dust footprints.The analysis of experiment photographing results shows photographing plane dust footprints is greatly affected by light distribution methods,which mainly include orientation light reflection method,dark-field illumination method and grazing incidence lighting method.While photographing dust footprints,traditional manual exposure method and different light distribution should be used to straighten out the relations between light and subject and object.It is advisable to use grazing incidence lighting method as much as possible to distribute light.