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1 Journal of Medical Informatics & Technologies

1 2010

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The pixel alignment based algorithm for continuous orientation field estimation

Więcław Ł., Porwik P.

Journal of Medical Informatics & Technologies

2010

Vol. 15

47--52

This paper presents a new estimation method of fingerprint orientation field. An accurate estimation of fingerprint orientation fields is an essential step in automatic fingerprint recognition systems (AFIS). Most popular, gradient-based method is very sensitive to noise (image quality). Proposed algorithm is a modification of, more resistant to noise, mask-based method, which provides orientation limited to discrete values. This modification is based on aggregation of pixel values differentiation and was used to more precise estimation of magnitude of orientation vectors. This approach allows to obtain a continuous values of orientation field still maintaining robust to noise.