The application of infrared chemical imaging to the detection and enhancement of latent fingerprints: Method optimization and further findings
The application of infrared chemical imaging to the detection and enhancement of latent fingerprints: Method optimization and further findings
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DOI：
10.1111/j.1556-4029.2007.00517.x
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发表时间：
2007-09-01
影响因子：
1.6
通讯作者：
Reedy, Brian J.
中科院分区：
文献类型：
--
作者：
Tahtouh, Mark;Despland, Pauline;Reedy, Brian J.
傅立叶变换红外(FTIR)化学成像允许从传统上给传统指纹检测方法带来问题的背景中收集指纹图像。在这项工作中，已经测试了该技术在更广泛的困难表面(包括聚合物钞票、各种类型的纸和铝饮料罐)上对指纹成像的适用性。对于每个新表面，采用了一种系统的方法来优化设置，如光谱分辨率、扫描次数和像素聚合，以便在不影响空间分辨率和最终指纹图像质量的情况下减少采集时间和文件大小。聚合物钞票上氰基丙烯酸酯熏蒸指纹的成像得到了改进，较大的图像区域收集时间更短。一个月前的聚合物钞票上的指纹已经成功地烟熏和成像。研究还发现，无论印刷背景如何，FTIR化学成像都能提供铝饮料罐上氰基丙烯酸酯熏蒸指纹的高质量图像。虽然可见光和紫外光光源不能在困难、无孔的背景上产生相同质量的指纹图像，但在许多情况下，它们可以在FTIR技术进行更高质量的成像之前用来定位指纹。由于纸张中的纤维素成分的淹没效应，尝试获取纸基多孔表面上的指纹的FTIR图像的尝试都没有成功，这些表面已经用吲哚三酮等现有的试剂处理过。
Fourier transform infrared (FTIR) chemical imaging allows the collection of fingerprint images from backgrounds that have traditionally posed problems for conventional fingerprint detection methods. In this work, the suitability of this technique for the imaging of fingerprints on a wider range of difficult surfaces (including polymer banknotes, various types of paper, and aluminum drink cans) has been tested. For each new surface, a systematic methodology was employed to optimize settings such as spectral resolution, number of scans, and pixel aggregation in order to reduce collection time and file-size without compromising spatial resolution and the quality of the final fingerprint image. The imaging of cyanoacrylate-fumed fingerprints on polymer banknotes has been improved, with shorter collection times for larger image areas. One-month-old fingerprints on polymer banknotes have been successfully fumed and imaged. It was also found that FTIR chemical imaging gives high quality images of cyanoacrylate-fumed fingerprints on aluminum drink cans, regardless of the printed background. Although visible and UV light sources do not yield fingerprint images of the same quality on difficult, nonporous backgrounds, in many cases they can be used to locate a fingerprint prior to higher quality imaging by the FTIR technique. Attempts to acquire FTIR images of fingerprints on paper-based porous surfaces that had been treated with established reagents such as ninhydrin were all unsuccessful due to the swamping effect of the cellulose constituents of the paper.