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NCJRS Abstract

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NCJ Number: 220226 Find in a Library
Title: Enhancement of Difficult-to-Capture, Two-Dimensional Footwear Impressions Using the Combined Effects of Overhead Lighting and the Perspective Control Lens
Journal: Journal of Forensic Identification  Volume:57  Issue:5  Dated:September/October 2007  Pages:658-671
Author(s): Joe Wai-wah Chung
Date Published: September 2007
Page Count: 14
Type: Report (Technical)
Format: Article
Language: English
Country: United States of America
Annotation: This paper discusses an enhancement method that uses the perspective control lens for the recording of difficult-to-capture, two-dimensional footwear impressions.
Abstract: The enhancement technique was tested on different types of footwear impressions on different type substrates where photographic recovery by ambient lighting and oblique forensic lighting was not feasible. A footwear impression is a common type of evidence found at crime scenes. Photography is the primary, and often the best, method to document and record footwear impressions. However, impressions may be difficult to recover using normal photography when the impressions are faint, are in a wet substance, or appear as colors and tones similar to that of the recipient surface. In this paper, photographic enhancement using the combined effect of overhead lighting and the use of the tilt and shift lens was studied to develop an additional technique for the recovery of difficult-to-capture, two-dimensional footwear impressions. 1 table, 1 reference, 11 figures
Main Term(s): Shoe prints and tire tracks
Index Term(s): Camera technology; Crime laboratories; Forensic geology; Photographic analyses; Photographic identification; Photography; Photography techniques; Science and Technology; Scientific techniques
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