Fingerprint image enhancement based on second directional derivative of the digital image

  • Authors:
  • Marius Tico;Vesa Onnia;Pauli Kuosmanen

  • Affiliations:
  • Nokia Research Center, Tampere, Finland;Institute of Digital and Computer Systems, Tampere University of Technology, Tampere, Finland;Institute of Signal Processing, Tampere University of Technology, Tampere, Finland

  • Venue:
  • EURASIP Journal on Applied Signal Processing
  • Year:
  • 2002

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Abstract

This paper presents a novel approach of fingerprint image enhancement that relies on detecting the fingerprint ridges as image regions where the second directional derivative of the digital image is positive. A facet model is used in order to approximate the derivatives at each image pixel based on the intensity values of pixels located in a certain neighborhood. We note that the size of this neighborhood has a critical role in achieving accurate enhancement results. Using neighborhoods of various sizes, the proposed algorithm determines several candidate binary representations of the input fingerprint pattern. Subsequently, an output binary ridge-map image is created by selecting image zones, from the available binary image candidates, according to a MAP selection rule. Two public domain collections of fingerprint images are used in order to objectively assess the performance of the proposed fingerprint image enhancement approach.