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1. WO1996041302 - CHARACTER RECOGNITION SYSTEM IDENTIFICATION OF SCANNED AND REAL TIME HANDWRITTEN CHARACTERS

Publication Number WO/1996/041302
Publication Date 19.12.1996
International Application No. PCT/US1996/004151
International Filing Date 27.03.1996
IPC
G06K 9/00 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
G06K 9/48 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
36Image preprocessing, i.e. processing the image information without deciding about the identity of the image
46Extraction of features or characteristics of the image
48by coding the contour of the pattern
CPC
G06K 2209/01
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
2209Indexing scheme relating to methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
01Character recognition
G06K 9/00872
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
00852Recognising whole cursive words
00865using stroke segmentation
00872with lexical matching
G06K 9/48
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
36Image preprocessing, i.e. processing the image information without deciding about the identity of the image
46Extraction of features or characteristics of the image
48by coding the contour of the pattern ; contour related features or features from contour like patterns, e.g. hand-drawn point-sequence
Applicants
  • WANG LABORATORIES, INC. [US]/[US]
Inventors
  • KADASHEVICK, Julie, A.
  • HARVEY, Mary, F.
  • KNOWLTON, Kenneth, C.
  • JOURJINE, Alexander
Agents
  • PAGLIERANI, Ronald, J.
Priority Data
08/484,63007.06.1995US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CHARACTER RECOGNITION SYSTEM IDENTIFICATION OF SCANNED AND REAL TIME HANDWRITTEN CHARACTERS
(FR) IDENTIFICATION DE SYSTEME DE RECONNAISSANCE DE CARACTERES MANUSCRITS EN TEMPS REEL ET SCANNES
Abstract
(EN)
A handwritten character recognition system that includes a document scanner for generating scanned images of a previously created document containing handwritten characters, and a pen and digitizing tablet for real time entry of handwritten characters by a user. The handwritten character recognition system includes an image processor connected from the document scanner for receiving the scanned image of a previously created document and generating one or more ordered cluster arrays. The ordered cluster arrays contain spatially ordered coordinate arrays of skeletal image arcs representing and corresponding to the strokes of the handwritten characters wherein the spatial order represents an induced time ordered sequence of creation of the strokes of the handwritten characters that emulates the sequence of creation of the character strokes. A low level recognition processor is connected from the time order induction processor for receiving the ordered cluster arrays and generating a sequential character array wherein the sequential character array contains a character list for each ordered cluster array and wherein each character list contains at least one character identification representing a possible interpretation of the corresponding ordered cluster array. A linguistic post processor may be connected from the low level recognition processor for receiving the sequential character array and generating an output string representing the most probable interpretation of the handwritten characters of the document.
(FR)
La présente invention concerne un système de reconnaissance de caractères manuscrits, comprenant un scanner de documents pour générer des images d'un document déjà créé contenant des caractères manuscrits, un crayon et un numériseur permettant à l'utilisateur d'introduire des caractères manuscrits en temps réel. Ce système de reconnaissance de caractères manuscrits comprend un processeur d'images raccordé à partir du scanner de document pour recevoir l'image scannée d'un document déjà créé et générer une ou plusieurs matrices d'agrégats ordonnés. Ces matrices d'agrégats ordonnés contiennent des matrices de coordonnées ordonnées de façon spatiale d'arcs d'images schématiques représentant les segments de caractères manuscrits et correspondant à ces derniers. L'ordre spatial représente une séquence ordonnée dans le temps, induite, de création des segments de caractères manuscrits qui émule la séquence de création des segments de caractères. Un processeur de reconnaissance de faible niveau est raccordé à partir du processeur d'induction de l'ordre dans le temps pour recevoir les matrices d´agrégats ordonnés et générer une matrice de caractères séquentiels contenant une liste de caractères pour chaque matrice d'agrégats ordonnés, chaque liste de caractères contenant au moins une identification de caractères qui représente une interprétation possible de la matrice correspondante d'agrégats ordonnés. Un processeur de poste linguistique peut être raccordé à partir du processeur de reconnaissance de faible niveau pour recevoir la matrice de caractères séquentiels et générer une chaîne de sortie représentant l'interprétation la plus probable des caractères manuscrits du document.
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