Apparent Ridges for Line Drawing

Tilke Judd, Fr├ędo Durand, and Edward H. Adelson


Abstract

Three-dimensional shape can be drawn using a variety of feature lines, but none of the current definitions alone seem to capture all visually-relevant lines. We introduce a new definition of feature lines based on two perceptual observations. First, human perception is sensitive to the variation of shading, and since shape perception is little affected by lighting and reflectance modification, we should focus on normal variation. Second, view-dependent lines better convey smooth surfaces. From this we define view-dependent curvature as the variation of the surface normal with respect to a viewing screen plane, and apparent ridges as the loci of points that maximize a view-dependent curvature. We present a formal definition of apparent ridges and an algorithm to render line drawings of 3D meshes. We show that our apparent ridges encompass or enhance aspects of several other feature lines.

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Apparent Ridges for Line Drawing

Information

title:
Apparent Ridges for Line Drawing
author:
Tilke Judd,
Fredo Durand,
and Edward H. Adelson.
citation:
ACM Transactions on Graphics (SIGGRAPH Proceedings), 26(3):19
shortcite:
SIGGRAPH
year:
2007
created:
2007-01-01
keyword:
adelson
summary:
apparentridges07
pdf:
http://persci.mit.edu/pub_pdfs/ApparentLines.pdf
type:
publication