Beyond Pixels: Illustration with Vector Graphics
Date
2006-02-14
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Abstract
This report presents a novel vector rendering pipeline that allows
us to easily break the pixel barrier and create high-quality illustrations.
Recently, most graphic research has been directed towards rendering pixel
images that appear realistic. In contrast, we investigate the generation of
vector graphic illustrations using non-photorealistic techniques such as line
rendering and Gooch shading. By combining vector output from both shading and
line rendering of 3D models we create high-quality illustrations that can
directly be used in print reproduction. Our approach uses a vector graphic
pipeline that tracks multiple attributes of strokes and uses them for
stylization. This allows to have multiple layers of line rendering such as
different stroke types or visible and hidden parts of strokes, each treated
differently according to specific stylization rules. Using high quality vector
graphics (as opposed to pixel renditions) for representing illustration is
essential, in particular, in the print reproduction process. Foremost, vector
graphics can be reproduced at any desired resolution; they do not suffer from
the resolution dependence of pixel images. In addition, only vector graphics
can capture fine details accurately while maintaining a reasonable file size.
Finally, vector graphics do not need to be half-toned when printed as long as
spot colors are used. Even if some layers of the image use, e. g., shading,
only those parts of the vector graphic need to be half-toned that actually do
not make use of the available spot colors. Thus, we can combine both shading
and line layers without compromising print quality.
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Computer Science