Using videogrammetry and 3D image reconstruction to identify crime suspects

Lena M. Klasen; Olov Fahlander

doi:10.1117/12.267172

19 February 1997 Using videogrammetry and 3D image reconstruction to identify crime suspects

Lena M. Klasen, Olov Fahlander

Proceedings Volume 2942, Investigative Image Processing; (1997) https://doi.org/10.1117/12.267172
Event: Enabling Technologies for Law Enforcement and Security, 1996, Boston, MA, United States

Abstract

The anthropometry and movements are unique for every individual human being. We identify persons we know by recognizing the way the look and move. By quantifying these measures and using image processing methods this method can serve as a tool in the work of the police as a complement to the ability of the human eye. The idea is to use virtual 3-D parameterized models of the human body to measure the anthropometry and movements of a crime suspect. The Swedish National Laboratory of Forensic Science in cooperation with SAAB Military Aircraft have developed methods for measuring the lengths of persons from video sequences. However, there is so much unused information in a digital image sequence from a crime scene. The main approach for this paper is to give an overview of the current research project at Linkoping University, Image Coding Group where methods to measure anthropometrical data and movements by using virtual 3-D parameterized models of the person in the crime scene are being developed. The length of an individual might vary up to plus or minus 10 cm depending on whether the person is in upright position or not. When measuring during the best available conditions, the length still varies within plus or minus 1 cm. Using a full 3-D model provides a rich set of anthropometric measures describing the person in the crime scene. Once having obtained such a model the movements can be quantified as well. The results depend strongly on the accuracy of the 3-D model and the strategy of having such an accurate 3-D model is to make one estimate per image frame by using 3-D scene reconstruction, and an averaged 3-D model as the final result from which the anthropometry and movements are calculated.

Citation Download Citation

Lena M. Klasen and Olov Fahlander "Using videogrammetry and 3D image reconstruction to identify crime suspects", Proc. SPIE 2942, Investigative Image Processing, (19 February 1997); https://doi.org/10.1117/12.267172

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