Image analysis – Pattern recognition – On-line recognition of handwritten characters
Patent
1996-07-15
1999-08-17
Coles, Edward L.
Image analysis
Pattern recognition
On-line recognition of handwritten characters
382123, 382185, 382201, 382209, 382294, G06K 900
Patent
active
059405341
ABSTRACT:
Reference patterns and an input pattern are expressed by the position coordinates of feature points obtained by approximating strokes by a predetermined points in advance. One-to-one stroke correspondences whose stroke-numbers are made equal to each other between reference pattern and the input pattern having different stroke-numbers and different stroke-orders each other are determined, and handwriting distortion is stably absorbed by performing an optimum affine transformation operation for each corresponding stroke pair. The inter-pattern distance between a normalized input pattern obtained by the affine transformation operation and the reference pattern is calculated, and the character categories of the reference patterns are sequentially output as candidate categories in order of increasing distance.
REFERENCES:
patent: 4607366 (1986-08-01), Morita et al.
patent: 4731857 (1988-03-01), Tappert
patent: 5113452 (1992-05-01), Chatani et al.
patent: 5121441 (1992-06-01), Chefalas et al.
patent: 5319721 (1994-06-01), Chefalas et al.
patent: 5581634 (1996-12-01), Heide
patent: 5588074 (1996-12-01), Sugiyama
patent: 5610996 (1997-03-01), Eller
patent: 5611000 (1997-03-01), Szeliski et al.
patent: 5644652 (1997-07-01), Bellagarda et al.
patent: 5687254 (1997-11-01), Poon et al.
patent: 5703963 (1997-12-01), Kojima et al.
patent: 5742705 (1998-04-01), Parthasarathy
Wakahara, Toru, "On-Line Cursive Script Recognition Using Local Affine Transformation", 1988, pp. 1133-1137.
Odaka, Kazumi, "Stroke-Order-Independent On-Line Character Recognition Algorithm and its Application", pp. 79-85, Jan., 1986.
Article from IEE Transactions on Pattern Analysis and Machine Intelligence, vol. 12, No. 8, Aug. 1990, entitled The State of the Art in On-Line Handwriting Recognition, by Charles C. Tappert, Ching Y. Suen and Toru Wakahara.
Article from IEEE Computer Society, Proceedings of the Third International Conference on Document Analysis and Recognition, Aug. 14-16, 1995, entitled "On-Line Cursive Kanji Character Recognition as Stroke Correspondence Problem," by Toru Wakahara et al.
Miyahara Sueharu
Nakajima Naoki
Odaka Kazumi
Wakahara Toru
Coles Edward L.
Nippon Telegraph and Telephone Corporation
Rosenblum David
LandOfFree
On-line handwritten character recognition using affine transform does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with On-line handwritten character recognition using affine transform, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On-line handwritten character recognition using affine transform will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-323004