Abstract
The area of characters from laser-printed documents was quantitatively measured using image analysis. A pdf text file was printed on 25 different laser printers from 6 different brands. The average value, the standard deviation and the variation of the blank area of the letters “o” within each of the sheets were calculated. The measures from the samples were compared to each other. Significant differences were found between the toner printers, in some cases even within the same brand and the same model.
It has been shown, that a horizontal profile of letter’s blank area can be established. This profiling can be used as a fast, non-destructive forensic method for differentiation purposes of toner printed documents.
It has been shown, that a horizontal profile of letter’s blank area can be established. This profiling can be used as a fast, non-destructive forensic method for differentiation purposes of toner printed documents.
DOI: https://doi.org/10.69525/jasqde.225 | Journal eISSN: 1524-7287
Language: English
Page range: 11 - 16
Published on: Jun 1, 2016
Published by: American Society of Questioned Document Examiners
In partnership with: Paradigm Publishing Services
© 2016 Rolf Hofer, published by American Society of Questioned Document Examiners
This work is licensed under the Creative Commons Attribution 4.0 License.