Writing input and dynamics regeneration device

Details Writing input and dynamics regeneration device Writing input and dynamics regeneration device

1986-10-09

1987-10-27

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

346 76PH, 382 11, 382 56, 382 3, G06K 900, G01D 1510

Patent

active

047035110

ABSTRACT:
A handwriting input method and apparatus for recreating handwriting dynamics. A time dependent code is first embedded in the writing path then later, after-the-fact, said code is detected by processing a digital representation of the writing image. Writing coordinates vs. associated time is decoded therefrom. After-the-fact writing position, velocity, and acceleration is derived from this data which can then be further processed by handwriting recognition and signature authentication devices. A code generating stylus is used to modify writing indicia by modulation of the writing markings thereby embedding time code information within the writing path. The modulated writing is generally uniform when viewed macroscopically but microscopically the embedded code becomes perceivable.

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CODEC Convolutional Coder, Viterbi Decoder STI-5268 Stanford Telecommunications, Inc.
Cyclotomics Inc. Product Information.

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