Handwriting Recognition Software

Handwriting Recognition Software

By: Shane Serafin

What is handwriting recognitionHistory Different types

Uses

AdvantagesDisadvantagesConclusionQuestionsSources

Overview

Definition: The ability of a computer to receive and interpret handwritten input from sources such as paper documents, photographs, touch-screens, and other devices and turning it into a digitized form.

What is Handwriting Recognition

1980s: Start of retail handwriting recognition system with electronic pen and electronic tablet

1989: Portable handwriting recognition computer: GRiDPad from GRiD Systems.

1997: First handwritten address interpretation system (HWAI) deployed by United States Postal Service

2007: First automatic writer recognition system: CEDAR-FOX

Brief History of Handwriting Recognition

Off-line RecognitionLooks at image form of handwritten strokesNot real time

Conversion image to letter coded text

Static formUses Optical Character Recognition or Intelligent Word RecognitionEarlier form of handwriting recognition

More difficult to decipher

Different Types of Handwriting Recognition

Character extraction by using an algorithm to look at:

Aspect ratio

Percent of pixels above the horizontal half way pointPercent of pixels above the vertical half way pointNumber of strokes

Reflected by Y axis

Reflected by X axis

Distance away from center

How to Determine Off-line Recognition Text

Example of Off-line Recognition

On-line RecognitionReal time transferHandwriting is direct input from a device

Sensor picks up pen movements

Dynamic form

Different Types of Handwriting Recognition

Need a pen and touch sensitive surfaceSoftware application looks at stroke order and directions of input

Converted into digital text

Uses fuzzy logic or neural network techniquesHow On-line Recognition is Determined

Postal-Address Interpretation

Uses of Handwriting Recognition

Handwriting Biometrics

Uses of Handwriting Recognition

Signature Verification

Uses of Handwriting Recognition

Preserve and Research Historical text

Uses of Handwriting Recognition

Form of writingTablets, Cell phones, Computers, Smart Boards

Uses of Handwriting Recognition

CalliGrapher:Microsoft Windows Mobile Pocket-PC 2003/2003SE/2005 devices running Windows Mobile 6.0 and older

Graffiti:

Android versions 1.6, 2.0, 2.1

CellWriter:

Window System running on Linux

MyScript:

PC and mobile devices

Software for Handwriting Recognition

Electronic data storageMore organized filesEasier data retrieval

Historical preservation

Can be easier form of writingVerification methods

Advantages of Handwriting Recognition

Not always accurateUnique style of writingSpacing of letters or words

Poor images of text

Different languagesModern handwriting compared to historical

Disadvantages of Handwriting Recognition

What handwriting recognition is

The different types

Importance of it

Conclusion

Questions

http://science.howstuffworks.com/biometrics1.htm

http://www.ehow.com/about_6552517_definition-handwriting-recognition.html

http://www.ehow.com/info_8085619_software-handwriting-recognition.html

http://www.ehow.com/info_8658117_challenges-handwriting-recognition.html

http://www.cse.yorku.ca/course_archive/2004-05/F/4441/HandwritingRecognition.pdf

http://en.wikipedia.org/wiki/Handwriting_recognition

Sources