Title: High-quality silhouette illustration for texture-based volume rendering
Authors: Nagy, Zoltán
Klein, Reinhard
Citation: Journal of WSCG. 2004, vol. 12, no. 1-3, p. 301-308.
Issue Date: 2004
Publisher: UNION Agency
Document type: článek
URI: http://wscg.zcu.cz/wscg2004/Papers_2004_Full/D61.pdf
ISSN: 1213-6972
Keywords: nefotorealistické vykreslování;objemové vykreslování;siluety
Keywords in different language: non-photorealistic rendering;volume rendering;silhouettes
Abstract: We present an accurate, interactive silhouette extraction mechanism for texture-based volume rendering. Compared to previous approaches, our system guarantees silhouettes of a user controlled width without any significant preprocessing time. Our visualization pipeline consists of two steps: (a) extraction of silhouettes with a width of one pixel, and (b) image post-processing for broadening of silhouettes. Step (a) is a mixture of object- and image-based- silhouette extraction models, maximally exploiting the screen resolution. This hybrid approach is neither sensitive to accuracy in gradient representation nor to the precision of the depth-buffer, as in earlier procedures. Step (b) is accomplished via smoothing and applying a threshold to the temporary result obtained in (a). To keep the latter process efficient, we perform fast convolution using FFT. Our silhouette extraction is conceptually similar to the corresponding method for polygonal representations, checking the frontand back facing property of adjacent triangles.
Rights: © UNION Agency
Appears in Collections:Volume 12, number 1-3 (2004)

Files in This Item:
File Description SizeFormat 
D61.pdf366,26 kBAdobe PDFView/Open

Please use this identifier to cite or link to this item: http://hdl.handle.net/11025/1732

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.