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Directional selection using 2D complex discrete wavelet transform and its application for image processing

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3 Author(s)
Zhang, Z. ; Ind. Technol. Center of Okayama, Soja, Japan ; Toda, H. ; Kawabata, H.

In this study, in order to realize the direction selectivity and shift invariability in all analysis levels simultaneously, we propose a method named the 2-dimensional complex discrete wavelet transform (CDWT) by using the RI-spline wavelet. We applied this method in fingerprint analysis. The results obtained can be summarized as follows: (1) The direction selectivity was realized by calculating the sum or difference between wavelet; coefficients that were obtained by the 2D CDWT. (2) 2D CDWT by RI-spline wavelet has been applied to the analysis of a fingerprint, and the direction of the 2D edges in all analysis levels could be extracted alternatively.

Published in:

SICE 2004 Annual Conference  (Volume:2 )

Date of Conference:

4-6 Aug. 2004