在刑事案件现场工作中，我们会遇到一些输电变压器被盗的现场。这类案件的犯罪分子通常在作案时先将变压器内的油放去，再拆卸陶瓷支架、钢片，从而盗走变压器内的铜。犯罪分子往往在作案时在陶瓷和钢片上留下油质灰尘手印。这类现场手印由于反差小以及拍照角度的限制，采用现 In the criminal case site work, we will encounter some of the scene of the transmission transformer stolen. Criminals in such cases usually first put the oil in the transformer out and then remove the ceramic brackets and steel sheets to steal the copper from the transformer. Criminals often leave oily dust handprints on ceramics and steel sheets when committing the crime. This type of on-site fingerprinting due to small contrast and camera angle restrictions, the use of the present