A Resolution-Independent Pen-and-Ink Illustration Representation
The representation we used in our
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.
||Hand and Egg
Last updated on March 26, 1996.