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Scribble matching tech

A technology of handwriting input and speed, applied in instruments, computing, electrical and digital data processing, etc., can solve problems such as low accuracy, achieve high matching rate, save storage and computing consumption, and improve efficiency.

Inactive Publication Date: 2004-08-11
HEWLETT PACKARD CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods proposed in the above three literatures all have relatively low accuracy

Method used

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Examples

Experimental program
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Embodiment Construction

[0058] Three handwriting matching algorithms of the present invention will be described below. Before detailing these three algorithms, the handwriting matching process and preprocessing steps are outlined first. The overview includes material that is part of the state of the art.

[0059] Script matching involves encoding each handwritten input and matching the encoded input with a stored script code. Preferably, the codes for the stored scripts are pre-calculated and stored in a look-up table.

[0060] Every script matching algorithm has two components: an encoder and a matcher. The encoder section is used whenever new script codes are added to the above lookup table. The encoder extracts a set of features from the handwriting data that represent an aspect of the handwriting that is stable enough to be used in search. The extracted codes are stored in some form of lookup table for retrieval.

[0061] Use the matchers section when doing a search. The matcher compares th...

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PUM

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Abstract

The present invention relates to scribble matching methods. The invention entails the identification and encoding of velocity minima in the input scribble. Three scribble matching algorithms are described: a syntactic matcher, a word matcher and an elastic matcher. The syntactic matcher encodes the input scribble according to the shape of the scribble in the region of the velocity minima. The word matcher encodes the input scribble according to the heights of the velocity minima from a reference line, using a continuous height encoding scheme. The elastic matcher encodes the input scribble according to a classification of the velocity minima and intermediate points.

Description

technical field [0001] The present invention relates to methods and apparatus for searching electronic ink samples without first converting the electronic ink to ASCII text. "Electronic ink" refers to the dynamic trace formed by the user when using a computer input device capable of obtaining handwritten input, such as a computer based on pen-written input. This technique is referred to as "handwriting matching technique" in the descriptive section of this patent application. Background technique [0002] For pen-based computers, various systems are known for recognizing handwriting. Such systems typically recognize individual characters in the input and convert them to ASCII text for later storage and processing by the system. This entails considerable computational overhead, which increases with the required recognition accuracy. In known systems, the recognition accuracy is rather limited for unrestricted inputs. [0003] In some handwriting recognition systems it is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/46G06K9/22G06K9/62
CPCG06K9/222G06V30/347G06V30/373G06V30/1423
Inventor R·赫尔D·雷诺D·吉普塔
Owner HEWLETT PACKARD CO
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