Technical note: A novel 3D scan-based optical method for analyzing lines drawn at different pen pressure

AŞICIOĞLU F., Yilmaz A. S., de Kinder J., Pekacar I., Gelir A.

FORENSIC SCIENCE INTERNATIONAL, vol.338, 2022 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 338
  • Publication Date: 2022
  • Doi Number: 10.1016/j.forsciint.2022.111388
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, BIOSIS, CAB Abstracts, CINAHL, Criminal Justice Abstracts, EBSCO Legal Source, EMBASE, MEDLINE, Veterinary Science Database, DIALNET
  • Keywords: Forensic science, Handwriting, Documents, 3D measurements, Pen pressure, Profile measurements, Printers, CROSSING LINES, STROKES, SEQUENCE
  • Istanbul Technical University Affiliated: Yes


Pen pressure is one of the important elements of handwriting and questioned document analysis which is also crucial to recognize forgery. In this paper, we present a new, non-contact, non-destructive, and relatively inexpensive technique to measure the width of the grooves made by the writing. Results demonstrate a clear difference in measured groove widths for varying pen pressure. The effect of passing a written or signed paper in different types of printers has also been studied. A clear decrease of the groove depth was noted when passing the document through a laser printer. An ink jet printer only resulted in a small decrease of the groove depth, while no effect could be detected from a dot matrix printer. (c) 2022 Elsevier B.V. All rights reserved.