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		<site>sibgrapi.sid.inpe.br 802</site>
		<citationkey>EspinhaCele:2005:HiHaRa</citationkey>
		<author>Espinha, Rodrigo,</author>
		<author>Celes, Waldemar,</author>
		<affiliation>Tecgraf / PUC-Rio</affiliation>
		<title>High-quality hardware-based ray-casting volume rendering using partial pre-integration</title>
		<conferencename>Brazilian Symposium on Computer Graphics and Image Processing, 18 (SIBGRAPI)</conferencename>
		<year>2005</year>
		<editor>Rodrigues, Maria Andréia Formico,</editor>
		<editor>Frery, Alejandro César,</editor>
		<booktitle>Proceedings</booktitle>
		<date>9-12 Oct. 2005</date>
		<publisheraddress>Los Alamitos</publisheraddress>
		<publisher>IEEE Computer Society</publisher>
		<conferencelocation>Natal</conferencelocation>
		<keywords>volume rendering, unstructured meshes, ray-casting, partial pre-integration.</keywords>
		<abstract>In this paper, we address the problem of the interactive volume rendering of unstructured meshes and propose a new hardware-based ray-casting algorithm using partial pre-integration. The proposed algorithm makes use of modern programmable graphics card and achieves rendering rates competitive with full pre-integration approaches (up to 2M tet/sec). This algorithm allows the interactive modification of the transfer function and results in high-quality images, since no artifact due to under-sampling the full numerical pre-integration exists. We also compare our approach with implementations of cell-projection algorithm and demonstrate that ray-casting can perform better than cell projection, because it eliminates the high costs involved in ordering and transferring data.</abstract>
		<language>en</language>
		<tertiarytype>Full Paper</tertiarytype>
		<format>On-line</format>
		<size>546 KiB</size>
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		<targetfile>espinhar_quality.pdf</targetfile>
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		<e-mailaddress>rodesp@tecgraf.puc-rio.br</e-mailaddress>
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		<url>http://sibgrapi.sid.inpe.br/rep-/sid.inpe.br/banon/2005/07.12.22.03</url>
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