MX9600189A - Method of stroke segmentation for handwritten input. - Google Patents

Method of stroke segmentation for handwritten input.

Info

Publication number
MX9600189A
MX9600189A MX9600189A MX9600189A MX9600189A MX 9600189 A MX9600189 A MX 9600189A MX 9600189 A MX9600189 A MX 9600189A MX 9600189 A MX9600189 A MX 9600189A MX 9600189 A MX9600189 A MX 9600189A
Authority
MX
Mexico
Prior art keywords
curvature
stroke
handwritten input
points
derivative
Prior art date
Application number
MX9600189A
Other languages
Spanish (es)
Other versions
MXPA96000189A (en
Inventor
Chris A Kortge
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of MX9600189A publication Critical patent/MX9600189A/en
Publication of MXPA96000189A publication Critical patent/MXPA96000189A/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • G06V30/32—Digital ink
    • G06V30/333—Preprocessing; Feature extraction
    • G06V30/347—Sampling; Contour coding; Stroke extraction

Abstract

The method of the present invention includes a step of calculating the derivative (140), or instantaneous rate of change, of the curvature at points in the handwritten input (110). The method then selects as stroke boundary points certain points (or pixels) in the input which lie at a midpoint between a point of high curvature derivative and a succeeding point of low curvature derivative (150). Such boundary points are not influenced by absolute curvature values, but rather only by relative changes in the curvature. The stroke segmentation boundary points are provided to a stroke-based recognizer for interpretation of the handwritten input (170).
MXPA/A/1996/000189A 1994-05-10 1996-01-10 Method of segmentation of traces for the entry of characters manuscri MXPA96000189A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24040794A 1994-05-10 1994-05-10
US240407 1999-01-29

Publications (2)

Publication Number Publication Date
MX9600189A true MX9600189A (en) 1998-11-29
MXPA96000189A MXPA96000189A (en) 1999-01-15

Family

ID=

Also Published As

Publication number Publication date
EP0710384A4 (en) 1997-05-02
EP0710384A1 (en) 1996-05-08
FI960110A0 (en) 1996-01-10
AU2431695A (en) 1995-12-18
PL312469A1 (en) 1996-04-29
NO955064L (en) 1995-12-14
CA2162489A1 (en) 1998-06-01
HUT75820A (en) 1997-05-28
CN1128074A (en) 1996-07-31
FI960110A (en) 1996-01-10
HU9503882D0 (en) 1996-02-28
IL113659A0 (en) 1995-08-31
JP2002515144A (en) 2002-05-21
BR9506197A (en) 1996-04-24
CZ6196A3 (en) 1996-06-12
SK3096A3 (en) 1996-10-02
NO955064D0 (en) 1995-12-14
WO1995032485A1 (en) 1995-11-30

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Legal Events

Date Code Title Description
FA Abandonment or withdrawal