A Resolution-Independent Pen-and-Ink Illustration Representation

Overview

The representation we used in our interactive illustration paper had two problems: it was very large, and it didn't permit rescaling of the illustration. We have developed a new representation which addresses both of these problems. It consists of a small raster image and a set of piecewise-linear discontinuity segments. We also have an algorithm which can produce from this representation an image of arbitrary size which has the properties that it changes sharply across the discontinuity segments and changes smoothly everywhere else. It accomplishes this output by using a modified reconstruction filter which respects discontinuities.

For example, using these discontinuities with a 27x22 pixel image, we produce the greyscale and illustration on the right. Ignoring the discontinuities produces the images on the left.

To generate illustrations, we generate an image of the desired size and fill it with pen-and-ink strokes which match the tone of the image. Here are some illustrations we've made with this system. Click to see them at full size.


Billiard Balls	Hand and Egg	Pepper

Personnel

Mike Salisbury - Graduate
Corey Anderson - Undergraduate
Dani Lischinski - Post-Doctorate
David Salesin - Professor

Publications

A Resolution-Independent Representation for Pen-and-Ink Illustrations. Mike Salisbury, Corey Anderson, Dani Lischinski, and David H. Salesin. To appear in SIGGRAPH 96.
[Directory with PostScript paper, with and without figures]

<salisbur@cs.washington.edu>
<corin@cs.washington.edu>
<danix@cs.washington.edu>
<salesin@cs.washington.edu>

Last updated on March 26, 1996.