中国司法鉴定Issue(5)：72-79,8.DOI:10.3969/j.issn.1671-2072.2024.05.010
光学相干断层成像技术在文书鉴定中的初步应用研究
Preliminary Application of Optical Coherence Tomography in Document Identification
摘要
Abstract
Objective In view of the limitations of optical coherence tomography(OCT)technology in the process of document inspection,a new numerical algorithm is developed from a deeper level,so as to realize the quantitative processing of OCT data set,and to provide supplementary evidence for document identification.Methods In this study,a frequency-domain OCT system with a central wavelength of 905 nm was used for in situ nondestructive testing of different printing ink and handwriting samples.Matlab programming software was also used to develop a set of numerical algorithms to perform a series of numerical analyses on OCT data set.In addition to applying the calculated results to the basic tomography visualization,the ink-paper interfaces were also identified accurately.Moreover,based on the established three-dimensional coordinate system,the surface average intensity(SAI)in different depth directions were calculated.Results By comparing SAI profiles of 14 handwriting samples,the different printing ink and handwritten handwriting were successfully distinguished.The SAI profiles of laser printing ink and pigment ink handwriting have an extreme value,while the SAI profiles of inkjet printing ink and dye ink handwriting were smoother.Conclusion Based on the quantitative analysis of OCT technology,it can provide an effective method for document identification.The OCT characterization results have a certain guiding role,and can lay a foundation for enriching the existing ecosystem of measurement techniques.关键词
文书鉴定/光学相干断层成像技术/笔迹检验/篡改(污损)文件检验Key words
document identification/optical coherence tomography(OCT)/handwriting test/tampered(contaminated)documents identification分类
社会科学引用本文复制引用
刘杰,孙威,陈深树,程良红,徐代化..光学相干断层成像技术在文书鉴定中的初步应用研究[J].中国司法鉴定,2024,(5):72-79,8.基金项目
深圳市科技创新委员会技术攻关面上项目(JSGG20210802152810032). （JSGG20210802152810032）
