@InProceedings{NehabGatt:2000:RaPaCa,
author = "Nehab, Diego and Gattass, Marcelo",
title = "Ray path categorization",
booktitle = "Proceedings...",
year = "2000",
editor = "Carvalho, Paulo Cezar Pinto and Walter, Marcelo",
pages = "227--234",
organization = "Brazilian Symposium on Computer Graphics and Image Processing, 13.
(SIBGRAPI)",
publisher = "IEEE Computer Society",
address = "Los Alamitos",
note = "The conference was held in Gramado, RS, Brazil, from October 17 to
20.",
keywords = "edge detection, ray path categorization, edge detection, image
segmentation algorithms, geometrical information extraction, pixel
colors, ray-traced images, geometrical information, image
rendering, equivalence classes, category information, rendering
process, detected edges, aliasing, ray tracer, memory
requirements.",
abstract = "Edge detection and image segmentation algorithms usually operate
on an image to extract geometrical information based on pixel
colors. For ray-traced images, the presence of geometrical
information on the scene from which the image was rendered allows
for a completely different approach. We present an algorithm that
divides rays into equivalence classes, or categories. The category
information is generated during the rendering process and used to
determine edges in the resulting image. Detected edges can later
be used to help determine areas subject to aliasing. Little effort
is needed to implement the described algorithms over an existing
ray tracer. Furthermore, the extra computational and memory
requirements are modest.",
conference-location = "Gramado, RS, Brazil",
conference-year = "17-20 Oct. 2000",
doi = "10.1109/SIBGRA.2000.883917",
url = "http://dx.doi.org/10.1109/SIBGRA.2000.883917",
organisation = "SBC - Brazilian Computer Society",
ibi = "6qtX3pFwXQZeBBx/w9xB2",
url = "http://urlib.net/ibi/6qtX3pFwXQZeBBx/w9xB2",
targetfile = "227-234.pdf",
urlaccessdate = "2024, May 04"
}