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Proceedings Paper

Difference of chirps: a class of quasi-wavelet filter functions for edge feature extraction
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Paper Abstract

The kernel associated with Fresnel diffraction, which is an exponential chirp function, has recently been shown to possess the shifting and scaling properties of wavelet functions. However, these scaling chirp functions do not satisfy the commonly used admissibility conditions. We propose to synthesize a class of quasi-wavelet filter functions by taking difference of two such chirp functions with two different scaling depths and term these filters as difference-of-chirps (DOC). The Fourier transform of DOC functions have zero values at the origin, and can be used for edge feature extraction. Computer simulations as well as some experimental results have been presented.

Paper Details

Date Published: 29 April 1999
PDF: 6 pages
Proc. SPIE 3729, Selected Papers from International Conference on Optics and Optoelectronics '98, (29 April 1999); doi: 10.1117/12.346767
Show Author Affiliations
Debesh Choudhury, Instruments Research and Development Establishment (India)
Somnath Bandyopadhyay, Univ. of Calcutta (India)


Published in SPIE Proceedings Vol. 3729:
Selected Papers from International Conference on Optics and Optoelectronics '98
Kehar Singh; Om Prakash Nijhawan; Arun Kumar Gupta; A. K. Musla, Editor(s)

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