Image analysis – Applications – Personnel identification
Reexamination Certificate
2003-12-04
2009-08-18
Mehta, Bhavesh M (Department: 2624)
Image analysis
Applications
Personnel identification
Reexamination Certificate
active
07577278
ABSTRACT:
In a method of filtering an image with bar-shaped structures by means of Gabor filters, which are formed in the spatial domain by a two-dimensional Gaussian bell-shaped curve on which a cosine function is superimposed in a main direction, the image is divided into tiles, a predominant direction of the bar-shaped structures is determined for each tile and the filtration is undertaken in such a way that one tile at a time is rotated until the predominant direction lies at right angles to the main direction of the Gabor filter, one filtration takes place in the main direction and another filtration takes place at right angles to this, and the filtered tile is rotated back again.
REFERENCES:
patent: 5659626 (1997-08-01), Ort et al.
Hong L. et al: “Fingerprint Image Enhancement: Algorithm and Performance Evaluation”; Aug. 1, 1998; IEEE Transactions on Pattern Analysis and Machine Intelligence; IEEE Inc. N.Y.; US vol. 20; NR. 8, pp. 777-789.
Yang J et al: “A Modified Gabor Filter Design Method for Fingerprint Image Enhancement”; Aug. 2003; Pattern Recognition Letters; North-Holland Publ. Amsterdam, NL; vol. 24; NR. 12; pp. 1805-1817.
Mehta Bhavesh M
NXP B.V.
Shikhman Max
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