Some Efficient Representations of 3D Information based on Octress

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Some Efficient Representations of 3D Information based on Octress

Show simple item record Sojan Lal,P Unnikrishnan, A Poulose Jacob,K 2008-11-05T12:41:45Z 2008-11-05T12:41:45Z 2000
dc.identifier.citation Department of Computer Science en_US
dc.description.abstract The thesis introduced the octree and addressed the complete nature of problems encountered, while building and imaging system based on octrees. An efficient Bottom-up recursive algorithm and its iterative counterpart for the raster to octree conversion of CAT scan slices, to improve the speed of generating the octree from the slices, the possibility of utilizing the inherent parallesism in the conversion programme is explored in this thesis. The octree node, which stores the volume information in cube often stores the average density information could lead to “patchy”distribution of density during the image reconstruction. In an attempt to alleviate this problem and explored the possibility of using VQ to represent the imformation contained within a cube. Considering the ease of accommodating the process of compressing the information during the generation of octrees from CAT scan slices, proposed use of wavelet transforms to generate the compressed information in a cube. The modified algorithm for generating octrees from the slices is shown to accommodate the eavelet compression easily. Rendering the stored information in the form of octree is a complex task, necessarily because of the requirement to display the volumetric information. The reys traced from each cube in the octree, sum up the density en-route, accounting for the opacities and transparencies produced due to variations in density. en_US
dc.language.iso en en_US
dc.publisher Cochin University of Science and Technology en_US
dc.subject Computer graphics en_US
dc.subject Octrees en_US
dc.subject 3D information en_US
dc.subject Vector quantization en_US
dc.title Some Efficient Representations of 3D Information based on Octress en_US
dc.type Thesis en_US

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