Geometry-guided progressive lossless 3D mesh coding with octree (OT) decomposition
ACM SIGGRAPH 2005 Papers
A Generic Scheme for Progressive Point Cloud Coding
IEEE Transactions on Visualization and Computer Graphics
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An important observation is that when compressing point clouds using Octree (OT) decomposition based compression algorithms [Peng and Kuo 2005; Huang et al. 2008], the octree nodes with only one non-empty child (single-point nodes), occur in an increasing frequency as the cell subdivision goes deeper. The commonly employed entropy codec uses a probability model which keeps updating during the coding process. However, as illustrated in Fig.1 (b), the symbol distribution keeps varying and thus the probability model trained online is seldom perfectly matched with the real statistical distribution. Thus, there is still much room left to further save the bitrates when using these codecs.