Image analysis – Applications – Personnel identification
Patent
1996-09-30
1999-10-05
Couso, Jose L.
Image analysis
Applications
Personnel identification
382125, 382254, G06K 900, G06K 940
Patent
active
059636564
ABSTRACT:
A fingerprint image is divided into blocks of pixels. The blocks are marked as directional or non-directional. The blocks are also determined to be within the foreground or background of the image. Contiguous regions of blocks that are in the foreground and are directional are selected. The quality measure is the ratio of the area of all these selected contiguous regions to the total area of the fingerprint image (i.e., the foreground.) The contribution of each of the blocks of the regions to the quality measure can be given by a distance from a block containing a reference point (a block of reference) within the foreground. Further, the block of reference can be located at the centroid of the foreground. Images are judged to be of poor quality if the quality measure is below a quality threshold and are judged to be of good quality if the quality measure is above the quality threshold. Optionally, poor quality images are examined further to determine if they are smudged or come from a dry finger. Good quality images are further processed to determine if they are partial or entire images of the fingerprint.
REFERENCES:
patent: 5524070 (1996-06-01), Shin et al.
patent: 5613014 (1997-03-01), Eshera et al.
patent: 5659626 (1997-08-01), Ort et al.
B.M. Mehtre, Fingerprint Image Analysis for Automatic Identification, Machine Vision and Applications, 6:124-139, 1993.
Nalini K. Ratha et al. "Adaptive Flow Orientation-Based Feature Extraction In Fingerprint Images", Pattern Recognition, vol.28, No. 11, pp. 1657-1672, 1995.
Dana H. Ballard et al. "Computer Vision, Ch. 5 `Region Growing`", 1982, pp. 149-150.
B.M. Mehtre "Fingerprint Image Analysis For Automatic Identification", Machine Vision and Applications (1993) pp. 124-139.
Bolle Rudolf Maarten
Pankanti Sharathchandra Umapatirao
Yao Yi-Sheng
Couso Jose L.
Dang Duy M.
International Business Machines - Corporation
Percello Louis J.
LandOfFree
System and method for determining the quality of fingerprint ima does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for determining the quality of fingerprint ima, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for determining the quality of fingerprint ima will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1180800