Specularities on surfaces with tangential hairs or grooves
Rong Lu; Koenderink, J.J.; Kappers, A.M.L.
Computer Vision, 1999. The Proceedings of the Seventh IEEE International Conference on
Volume 1, Issue , 1999 Page(s):2 - 7 vol.1
Digital Object Identifier 10.1109/ICCV.1999.791189
Summary:Specularities on surfaces with tangential hairs or grooves are
readily observable in nature. Examples of such phenomena are the arched
or looped highlights observed on horses and on human heads and the
linear or curved specularities observed on parts of industrial machinery
that have tangential grooves. We investigate the geometry of curvilinear
specularities on surfaces of different curvature with tangential hairs
or grooves of different orientation, under controlled lighting and
viewing conditions. First the nature of these specularities is
investigated qualitatively. Then specularities on parametric surfaces
and hair or groove orientations are calculated for some specific cares.
Explicit calculations of specularities on some special surfaces,
cylinders, cones, and spheres, are verified by photographs of the
reflections. Aspects of the work are applicable to computer graphics and
can be utilized for the image interpretation of surface specularities
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