Image analysis – Pattern recognition – Feature extraction
Reexamination Certificate
2001-07-24
2008-07-08
LaRose, Colin (Department: 2624)
Image analysis
Pattern recognition
Feature extraction
C382S170000
Reexamination Certificate
active
07397953
ABSTRACT:
Edges in a block of a digital image are detected by determining an entropy of a histogram of the block.
REFERENCES:
patent: 5115477 (1992-05-01), Groezinger
patent: 5150433 (1992-09-01), Daly
patent: 5271064 (1993-12-01), Dhawan et al.
patent: 5377018 (1994-12-01), Rafferty
patent: 5481620 (1996-01-01), Vaidyanathan
patent: 5594807 (1997-01-01), Liu
patent: 6184682 (2001-02-01), Ehman et al.
patent: 6329819 (2001-12-01), Manduca et al.
patent: 6356651 (2002-03-01), Murakami
patent: 6858007 (2005-02-01), Akselrod et al.
patent: 2001/0043754 (2001-11-01), Memon et al.
patent: 0974933 (2000-01-01), None
patent: WO 99/53444 (1999-10-01), None
Vitulano et al. “Edge Detection Using a New Definition of Entropy,” 13th International Conference on Pattern Recognition (ICPR'96)—vol. 2, 1996, pp. 141-145.
Althouse, M.L.G. “Image segmentation by local entropy methods,” 1995 International Conference on Image Processing (ICIP'95)—vol. 3, pp. 61-64.
Boles et al. “An image processing approach for estimating the number of liveprawn larvae in water,” ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications, 1999, vol. 2, pp. 571-574.
Pietikainen et al., “Edge information in color images based on histograms of differences” , IEEE, ISBN 0-8186-0742-4, pp. 594-596 (1986).
Chang-Joon Park et al: “An edge-based block segmentation and classification for document analysis with automatic character string extension” System, Nan and Cybernetics, 1996., IEEE International Conference on Beijing, China Oct. 12-17 New York, NY USA XP010206713 pp. 707-712.
Plan N. R, et al: “Entropic Thresholding” Signal Processing, EP Journal Devoted to the Methods and Applications of signal Processing. Elsevier Science Publishers B.V. Amsterdam, NL vol. 16 No. 2 , Feb. 1, 1989 pp. 97-108 XP00098440.
Yin P - Y; “Skew detection and block classification of printed documents” Image and Vision Computing, Jun. 1, 2001, Elsevier, NL vol. 19, No. 8, pp. 567-579 XP002246200.
Hewlett--Packard Development Company, L.P.
LaRose Colin
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