关键词:

高光谱成像技术, 篡改（污损）文件鉴定, 文件形成方式鉴定, 变造文件鉴定, 模糊记载鉴定

Abstract:

In practice, Forensic examination of altered and damaged document is mostly use the tools of microscope, video spectral comparator （VSC）, static indentation meter and other physical and chemical inspection methods. Traditional spectral inspection methods are either limited by the spectral range, or have a low differentiation rate for similar substances, or unable to image the whole, and the results are difficult to provide accurate support for forensic examination of altered and damaged document. Hyperspectral imaging （HSI） is an integration of conventional imaging technology and spectroscopy to detect subtle spectral differences between chemically similar substances, using the different images and spectral properties of substances for rapid nondestructive analysis, which can reveal detailed features that are more difficult to observe by traditional technical means; the spectral image data processing method can also improve the recognition of ambiguous elements on the document. By reviewing the technical principles, data processing methods and specific applications of hyperspectral imaging techniques in forensic examination of altered and damaged document, the paper summarizes and outlooks the challenges and development directions in the future research.

Key words:

hyperspectral imaging technology, identification of tampered （contaminated） documents, identification of document formation methods, identification of altered documents, identification of fuzzy records