Apparatus for extracting skin pattern features and a skin patter

Details Apparatus for extracting skin pattern features and a skin patter Apparatus for extracting skin pattern features and a skin patter

1996-04-12

2000-01-25

Au, Amelia

Image analysis

Applications

Personnel identification

382195, G06K 946

Patent

active

060185864

ABSTRACT:
A skin pattern image is filtered by convolution calculation on a real plane or product calculation on a Fourier transformed plane with each of two-dimensional filters prepared according to kinds of features to be extracted of the skin pattern image. Image intensity of each subregion of each filtered data is calculated. Feature of each subregion is represented by a feature parameter corresponding to a filter that gives a highest value of the image intensity of the subregion. An initial pattern of features thus obtained is smoothed to minimize an evaluation function. A filtered skin pattern image having pixel values of each subregion smoothed by a set of filters prepared for extracting a kind of features is further filtered by another set of filters for extracting another kind of features.

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patent: 5659626 (1997-08-01), Ort et al.
B.G. Sherlock, "Fingerprint Enhancement by Directional Fourier Filtering", Image Signal Process., vol. 141, No. 2, Apr. 1994, pp. 87-94.
T. Kamei et al., "Image Filter Design for Fingerprint Enhancement", IEEE Int. Symp on Computer Vision, Nov. 1995, pp. 109-114.
Ratha et al., "Adaptive Flow Orientation-Based Feature Extraction in Fingerprint Images," Pattern Recognition, vol. 28, No. 11, pp. 1657-1672, Mar. 1995.
Gonzales et al, "Digital Image Processing", 1992, Addison-Wesley Pub. Co, pp. 187-189.

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