
Chapter | 6 Processing of Handwriting and Sketching Dynamics
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(d)(c)(b)(a)
p
(
t
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y
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t
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x
(
t
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ttt
FIGURE 6.2 Sketching of a symbol (a) and the resulting signals x(t), y(t) and p(t)
from the digitiser tablet in parts (b), (c) and (d), respectively.
address one central goal: tracing the pen movement during writing,
drawing, sketching or signature processes over time. Consequently,
all of these devices provide at least two categories of position sig-
nals: the horizontal and the vertical position of the pen tip over time.
In accordance to the image processing notation, these signals are
also usually referred to as x(t) (horizontal) and y(t) (vertical) writing ...