Non-Photorealistic Computer Graphics Library

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Found 4 item(s) authored in "1993".

Proceedings A Display Algorithm of Brush Strokes Using Bézier Functions
Tomoyuki Nishita, Shinichi Takita, Eihachiro Nakamae.
Proc. of Computer Graphics International '93, pp. 244--257, 1993. [BibTeX]

Article Electronic Kaleidoscopes for the Mind
Clifford A. Pickover, Larry Rudolph.
Computer Graphics Forum, Vol. 12, No. 1, pp. 41--46, 1993. [BibTeX]

Article On the Application of Quantization and Dithering Techniques to History of Arts
P. Coltelli, Giorgio P. Faconti, F. Marfori.
Computer Graphics Forum, Vol. 12, No. 3, pp. 351--362, 1993. [BibTeX]

Proceedings 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] Find this paper on Google

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.

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