化学成像技术在手印显现和增强中的应用

化学成像技术结合光谱分析和成像技术从而同时获得物质的光谱和空间各点的组成和结构信息。振动光谱方法(红外和拉曼光谱)与成像相结合，具有灵敏、快速、无损检验等优点，能够为检验鉴定提供定性定量的准确信息，近年来在物证鉴定领域获得了重要的应用。手印的显现和增强有多种方法，化学成像技术作为一种潜力巨大的方法可以显现多种客体上的潜在手印而不需要任何前处理。该技术还可以增强用其他方法显现后的手印，使之与背景形成较大反差。随着成像仪器的发展，化学成像技术在手印显现领域的应用将会一步拓展。文章介绍了化学成像技术的基本原理和仪器，综述了化学成像技术在潜在手印的显现和增强方面的具体应用，展望了化学成像技术的发展前景。

The Application of Chemical Imaging to Detection and Enhancement of Latent Fingerprints

Chemical imaging (CI) integrates conventional imaging and spectroscopy to attain both spectral and spatial components and structural information from an object simultaneously.Vibrational spectroscopic methods,such as infrared and Raman spectroscopy,combined with imaging are particularly useful.In recent years,CI has found important application in the field of forensic science due to its advantage of highly sensitive,rapid,non-destructive features and it can provide qualitative and quantitative information about specimen at one time.There are many methods for detection and enhancement of latent fingerprints.CI is an emerging platform technology with great potential to visualize latent fingerprints on many objects without any pre-treatment.CI can enhance the quality of the fingerprints developed by conventional methods,then form larger contrast with the background.With the advancement of instruments,the application of CI in the field of fingerprint detection will be more widely used.This paper provides an overview of the principal and classification of CI instrumentation,and reviews the application of CI to detection and enhancement of latent fingerprints.Finally,the direction of CI technology development is viewed.