Photoshop CC软件处理变形手印的研究

Research on Handling Deformed Fingerprints by Photoshop CC Software

在现场勘查中,提取的手印多为残缺变形甚至不具备比对条件。为提高变形手印的比对价值,针对直角棱边和弧形棱边客体上的变形手印照片,探究利用Photoshop CC软件进行处理的方法,通过透视裁剪、拼接分段、自由变换、锐化图像明度通道等操作步骤对变形手印进行图像处理。将处理后的变形手印与样本手印进行人工检验和指纹识别系统评价。实验结果表明:通过图像处理的变形手印,手印形状和纹线清晰程度得到一定的改善,与样本手印进行比对可以达到同一认定条件。因此,运用Photoshop CC软件对直角棱边和弧形棱边客体上的变形手印进行处理可以提高比对质量。

In the on-site investigation,most of the fingerprints extracted are incomplete or even do not have conditions for comparison.Therefore,in order to improve the comparison value of deformed fingerprints,the method of processing the deformed fingerprints on the objects with right-angled edges and curved edges by using Photoshop CC software is explored,through perspective cutting,splicing segmentation,free transformation,sharpening image brightness and other image processing methods.Using the system of manual inspection and fingerprint recognition system to compare the fingerprints with sample fingerprints,the paper evaluates and analyzes the deformed fingerprints after image restoration.The results show that the shape and lines of the fingerprint can be improved to a certain extent,and the same identification conditions can be achieved.Therefore,the deformed fingerprints on objects with right-angled edges and curved edges can be restored by Photoshop CC software,so as to improve the quality of comparison.