Method and apparatus for handwriting recognition using invariant

Image analysis – Pattern recognition – Feature extraction

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

382159, G06K 900

Patent

active

057684200

ABSTRACT:
Handwriting recognition which is invariant with respect to translation, rotation and scale is achieved with a new feature signal, ratio of tangents, and a new application of the normalized curvature feature. Use of these features is optimized by augmenting the ratio of tangents with the sign of local curvature and weighing each feature signal with its relative discriminative power.

REFERENCES:
patent: 3863218 (1975-01-01), Oka et al.
patent: 3868636 (1975-02-01), Schlang
patent: 4365235 (1982-12-01), Greanias et al.
J. Hu, et al., Handwriting Recognition With Hidden Markov Models and Grammatical Constraints; Dec. 7-9, 1994. No Place of Publ. & No Page #.
R. Vaz, et al., Generation of Affine Variant Local Contour Feature Data; Pattern Recognition Letters 11 (1990) pp. 479-483.
B. Shahraray, et al., Optimal Smoothing of Digitized Contours; May 1986. No page #& No place of Publ. 5 Mar. 1997.
W.E.L. Grimson, An Implementation of a Computational Theory of Visual Surface Interpolation; Computer Vision, Graphics and Image Processing 22, pp. 39-69 (1983).
B. Shahraray, et al., Robust Depth Estimation From Optical Flow, Reprinted from Proceedings of the Second Int'l Conference on Computer Vision, Tampa, Florida, Dec. 5-8, 1988, no page #.
K. Arbter, et al., Application of Affine-Invariant Fourier Descriptors to Recognition of 3-D Objects; EEE Transactions on Pattern Analysis and Machine Intelligence, vol. 12/Jul. 1990, no page #.
T. Lyche et al., Computation of Smoothing and Interpolating Natural Splines Via Local Bases; Consumer Anal., No. 6, Dec. 1973, no page #.
C.C. Tappert, Cursive Script Recognitiion by Elastic Matching; IBM J. Res. Develop., vol. 6, Nov. 1982. No Page #.
A.M. Bruckstein, Invariant Signatures for Planar Shape Recognition under Partial Occlusion ;CVGIP: Image Understanding vol. 58, No. 1, Jul. pp. 49-65, 1993.

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

Method and apparatus for handwriting recognition using invariant does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for handwriting recognition using invariant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for handwriting recognition using invariant will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1735941

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