Function approximation processing method and image...

Image analysis – Pattern recognition – Feature extraction

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C382S100000, C382S173000, C382S190000, C382S266000, C358S002990, C358S462000, C358S500000, C345S442000

Reexamination Certificate

active

07873218

ABSTRACT:
A function approximation processing method comprises inputting and binarizing image data, extracting contour from the binarized image data, estimating tangent points in horizontal and vertical directions from the contour, and approximating contour between adjacent tangent points among the estimated tangent points with a predetermined function, thereby an input object such as a character or a figure can be processed at high speed, and outline data with high image quality can be generated with a reduced number of points.

REFERENCES:
patent: 5253336 (1993-10-01), Yamada
patent: 5500927 (1996-03-01), Sander-Cederlof et al.
patent: 5900948 (1999-05-01), Shigeeda et al.
patent: 5933528 (1999-08-01), Katayama et al.
patent: 6903742 (2005-06-01), Fushiki et al.
patent: 2002/0145616 (2002-10-01), Doan
patent: 2004/0136609 (2004-07-01), Ichikawa et al.
patent: 2004/0247206 (2004-12-01), Kaneda et al.
patent: 2006/0155464 (2006-07-01), Smartt
patent: 2-93879 (1990-04-01), None
patent: 3-048375 (1991-03-01), None
patent: 3-105574 (1991-05-01), None
patent: 5-108823 (1993-04-01), None
patent: 6-12488 (1994-01-01), None
patent: 6-282658 (1994-10-01), None
patent: 7-085110 (1995-03-01), None
patent: 8-153191 (1996-06-01), None
patent: 9-134441 (1997-05-01), None
Cinque et. al., “Shape Descriptoion Using Cubic Polynomial Bezier Curves”, Pattern Recognition Letters 19, 1998, pp. 821-828, Elsevier Science.
Elber et al., “Comparing Offset Curve Approximation Methods”, IEEE, Computer Graphics and Applications, vol. 17, No. 3, pp. 62-71, May/Jun. 1997.
Chang and Yan, “Vectorization of Hand-Drawn Image Using Piecewise Cubic Bezier Curves Fitting”, Pattern Recognition, vol. 31, No. 11, pp. 1747-1755, Elsevier Science Ltd Mar. 1998.
Sohel et al., “Enhanced Bezier Curve Models Incorporating Local Information”, Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP '05). IEEE International Conference on , vol. 4, No., pp. 253- 256 vol. 4, Mar. 18-23, 2005.
Sederberg, T.W. and Farouki, R.T.; , “Approximation by interval Bezier curves,” Computer Graphics and Applications, IEEE , vol. 12, No. 5, pp.87-95, Sep. 1992.
“Space-Efficient Outlines from Image Data via Vertex Minimization and Grid Constrains”, Graphical Models and Image Processing vol. 59 No. 2, pp. 73-88 (1997).
Office Action, dated May 29, 2009, iin JP 2004/130192.
“Optimal Piecewise Linear Approximation of Plane Curves”, SATO, The Institute of Electronics, Information and Communication Engineers Paper Sep. 1982 vol. J65-D No. 9, pp. 1144-1150.
“Paper Document Digitization Using Function Figure Representation”, Mori Kohichi, Wada Hohichi and Toraichi Kazuo, Information Processing Society of Japan Report vol. 99, No. 57, pp. 17-23.
Office Action, dated May 25, 2009, in JP 2004-161571.

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

Function approximation processing method and image... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Function approximation processing method and image..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Function approximation processing method and image... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2629344

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