Image block classification based on entropy of differences

Image analysis – Pattern recognition – Feature extraction

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

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.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Image block classification based on entropy of differences does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image block classification based on entropy of differences, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image block classification based on entropy of differences will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3969790

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.