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NCJRS Abstract

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NCJ Number: 222092 Find in a Library
Title: Digital System for Imaging Bitter Patterns
Journal: Journal of Forensic Identification  Volume:58  Issue:2  Dated:March/April 2008  Pages:1-4
Author(s): Bruce E. Koenig; Douglas S. Lacey; Steven A. Killion
Date Published: March 2008
Page Count: 4
Type: Report (Study/Research)
Format: Article
Language: English
Country: United States of America
Annotation: This article discusses Bitter (ferrofluid development) pattern imaging.
Abstract: This article discusses the present film setup and its protocol; the requirements of the new digital system, its components, and protocol; image enhancement through post-processing; and forensic recommendations. Though this article specifically discusses Bitter pattern imaging, most of the information is applicable to digital macroimaging systems in other forensic applications. Bitter patterns are commonly used in audio duplication, enhancement, authenticity, and voice comparison examinations of analog tapes. The specific makes and models of the camera, lenses, and accessories are not listed in this article, because comparable equipment is readily available from a number of different manufacturers. This article includes sections on Bitter pattern visualization, the present film-based macrophotography system, the present film-based macrophotography protocols, the digital macroimaging system requirements, the new digital macroimaging system, image enhancement through post-processing techniques, and some forensic recommendations. Tables, figures, references, appendix
Main Term(s): Digital communications; Tape recordings; Voice identification
Index Term(s): Communication techniques; Investigative techniques; Visual electronic surveillance
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