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《Acta Optica Sinica》 2017-08
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Illumination-Computation Acceleration Structure Based on Sparse Voxel Directed Acyclic Graph

Yuan Yuwei;Quan Jicheng;Wu Chen;Liu Yu;Wang Hongwei;Department of Electronic and Information Engineering,Naval Aeronautical and Astronautical University;Department of Aeronautic and Astronautic Intelligence,Aviation University of Air Force;  
An illumination-computation acceleration structure based on the sparse voxel directed acyclic graph(SVDAG)is proposed.By merging the same nodes from bottom to top,the sparse voxel octree is converted into a SVDAG,and the polysemy of spatial positions can be eliminated by using the traversal paths and the child masks of the given nodes.Aiming at the closed geometry,an algorithm based on the double depth maps can be used to merge adaptively the nodes located in the closed region,which can further reduce the storage cost while the performance of illumination computation is maintained.A inter-frame multiplex method of SVDAG based on the time correlation is proposed in which all frames of the dynamic scene are used to constitute an integral SVDAG acceleration structure,which can improve the update rate.The experimental results indicate that the rendering efficiency of threedimensional scene based on the new algorithm is enhanced.When a high resolution dynamic scene is conducted,a relatively high frame rate still can be obtained.
【Fund】: 吉林省自然科学基金(20130101069JC);; 军内武器装备重点科研基金(KJ2012240)
【CateGory Index】: TP391.41
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