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Proceedings Paper

Observations on the effects of image processing functions on fingermark data in the Fourier domain
Author(s): Simon K. Bramble; Paola M. Fabrizi
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Paper Abstract

One of the image processing functions used for the enhancement of laten fingermark images is the Fourier transform. This paper describes some effects of spatial resolution, zero-filling and windowing on fingermark data in the Fourier domain. It is shown that with an understanding of the fingermark structure it is possible to determine the approximate prosition of the frequency data in the Fourier domain corresponding to the fingermark image detail. The effect of attenuation of frequency data on a zero-filled image is shown to be different to the same attenuation on a non-zero-filled image. The effects of windowing spatial data on the frequency data are also highlighted and compared with the same data after the application of a Hanning window.

Paper Details

Date Published: 1 September 1995
PDF: 7 pages
Proc. SPIE 2567, Investigative and Trial Image Processing, (1 September 1995); doi: 10.1117/12.218468
Show Author Affiliations
Simon K. Bramble, Metropolitan Police (New Scotland Yard) (United Kingdom)
Paola M. Fabrizi, Metropolitan Police (New Scotland Yard) (United Kingdom)


Published in SPIE Proceedings Vol. 2567:
Investigative and Trial Image Processing
Leonid I. Rudin; Simon K. Bramble, Editor(s)

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