ISSN: 0022-1198
CODEN: JFSCA
Page Count: 12

Image Processing and Statistical Analysis as an Aid in the Comparison of Typewritten Impressions
Noblett, MG
Special agent, Federal Bureau of Investigation Laboratory Division, DC

(Received 12 September 1986; accepted 20 October 1986)

Abstract

A device is being evaluated which images and statistically evaluates typewritten impressions on paper. The device can differentiate between typeface designed and manufactured by one company and typeface copied from the same design but manufactured by a different company. The device can make precise and detailed measurements of typewritten impressions while reducing the effects of the ribbon and paper to provide a valid and reliable image of the individual typewritten characters.

Keywords:
questioned documents, typewriters, comparative analysis, digital image processing

Paper ID: JFS12407J
DOI: 10.1520/JFS12407J
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