Apparatus and method for tracking handwriting from visual input

Details Apparatus and method for tracking handwriting from visual input Apparatus and method for tracking handwriting from visual input

1995-06-15

2000-03-28

Bella, Matthew C.

Image analysis

Applications

Target tracking or detecting

382186, 382313, 345179, G06K 900

Patent

active

060441658

ABSTRACT:
A system for detecting movement of a writing implement relative to a writing surface to determine the path of the writing implement. The writing implement tip is determined within the image and used to form a kernel. The determination is made either manually, by looking for a predetermined pen tip shape, or by looking for a position of maximum motion in the image. That kernel is tracked from frame to frame to define the path of the writing implement. The tracking is accomplished by correlating the kernel to the image: either to the whole image, to a portion of the image near the last position of the kernel, or to a portion of the image predicted by a prediction filter.

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