Apparatus and method for tracking handwriting from visual input
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United States of America Patent
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-
Mar 28, 2000
Grant Date -
N/A
app pub date -
Jun 15, 1995
filing date -
Jun 15, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
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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Cited Art Landscape
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