Skeletal strokes
Author(s): Siu Chi Hsu, Irene H. H. Lee, N. E. Wiseman.
Proceedings: Proceedings of the 6th annual ACM symposium on User interface software and technology, pp. 197--206, Atlanta, Georgia, United States,
1993.
[BibTeX]
Abstract:
A skeletal stroke is a kind of general brush stroke for changing
the shape of pictures as if by bending, shearing, twisting,
while conservating the aspect ratio of selected features
on tie picture. It is neither a simple warping nor texture
mapping technique, but a new method for controlling the
deformation of a picture. A deformation model of a cocJrdinate
system has been proposed taking into account cases
of discontinuous or extreme bending. Complicated pictures
can be built up hierarchically by defining higher order
strokes and recursive strokes. It is therefore a powerful
general drawing tool and extended image transformation
instrument. The use of skeletal strokes as a replacement
for affine transformations in IFS coding has been explored.
A novel general anchoring mechanism is proposed, which
allows arbitrary control of any point in the picture. This
control flexibility is particularly desirable in computer animation
and digital typography. As a result, virtual ‘2-D
models’ of cartoon characters as well as pseudo 3-D objects
can be created and manipulated with ease.