Statistical mixture approach to automatic handwriting recognitio

Details Statistical mixture approach to automatic handwriting recognitio Statistical mixture approach to automatic handwriting recognitio

1991-10-31

1994-08-30

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 30, G06K 900

Patent

active

053435370

ABSTRACT:
Method and apparatus for automatic recognition of handwritten text based on a suitable representation of handwriting in one or several feature vector spaces(s), Gaussian modeling in each space, and mixture decoding to take into account the contribution of all relevant prototypes in all spaces. The feature vector space(s) is selected to encompass both a local and a global description of each appropriate point on a pen trajectory. Windowing is performed to capture broad trends in the handwriting, after which a linear transformation is applied to suitably eliminate redundancy. The resulting feature vector space(s) is called chirographic space(s). Gaussian modeling is performed to isolate adequate chirographic prototype distributions in each space, and the mixture coefficients weighting these distributions are trained using a maximum likelihood framework. Decoding can be performed simply and effectively by accumulating the contribution of all relevant prototype distributions. Post-processing using a language model may be included.

REFERENCES:
patent: 4731857 (1988-03-01), Tappert
patent: 5029223 (1991-07-01), Fujisaki
patent: 5075896 (1991-12-01), Wilcox et al.
patent: 5105468 (1992-04-01), Guyon et al.
patent: 5138668 (1992-08-01), Abe
"Parametric estimation for normal mixtures"; Bezdek et al. Pattern Recognition Letters 3 (1985) 79-84 North-Holland.
"A Bayesian Approach to Clustering and Classification"; Karen B. Laskey ISSN#0-7893-0233-8/91 IEEE pp. 179-183 vol. 1 Oct. 16, 1991.

Affiliated with

Also associated with

Rating

Statistical mixture approach to automatic handwriting recognitio does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Statistical mixture approach to automatic handwriting recognitio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Statistical mixture approach to automatic handwriting recognitio will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-35601