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- Title
暗记点阵形态特征鉴别彩色激光印刷文件的可行性研究.
- Authors
李江春
- Abstract
Objective Characteristic code patterns are always the hot and difficult issue for questioned document examination. This paper tries to study the feasibility of identifying color laser printers/photocopiers and/or the relevant printed documents through outlining the involved instruments' code patterns and analyzing whether the code patterns are unique and vary with different printed time. Methods More than 130 samples, produced at the different time with 9-brand printers/ photocopiers of 30 models, were collected to test by both the optical and scanning visualization. With the help of VSC5000 document inspector and Photoshop software, all the apparatus' code patterns were shown and analyzed from every tested samples produced by the above-mentioned instruments, along with the comparison among the code patterns given birth with a same printer/photocopiers at different time. Results There are very clear differences among the code patterns from the samples of 9 brands of printers/photocopiers. However, one same printer/photocopier depends on its brand and model to engender invariable or changed code patterns printed at different time. Conclusions Identification of color laser printer/copied document can be done by the apparatus' characteristic code pattern, demonstrating it is scientific, reliable and feasible.
- Subjects
FORENSIC document examination; LASER printers; NONIMPACT printers; FORENSIC sciences; CRIMINAL investigation
- Publication
Forensic Science & Technology, 2018, Vol 43, Issue 2, p114
- ISSN
1008-3650
- Publication type
Article
- DOI
10.16467/j.1008-3650.2018.02.006