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    • 4. 发明授权
    • Method and apparatus for encoding and decoding three-dimensional object data
    • 用于对三维物体数据进行编码和解码的方法和装置
    • US07263236B2
    • 2007-08-28
    • US10727629
    • 2003-12-05
    • In-kyu ParkShin-jun LeeIn-wook SongChang-su KimSang-uk Lee
    • In-kyu ParkShin-jun LeeIn-wook SongChang-su KimSang-uk Lee
    • G06K9/36G06K9/46G06T17/00
    • G06T9/001G06T9/40
    • Provided are methods and apparatuses for encoding and decoding three-dimensional object data, which consists of point texture data, voxel data, or octree data. The method of encoding three-dimensional object data involves generating three-dimensional object data having a tree structure in which nodes are attached labels indicating their types; encoding nodes of the three-dimensional object data; and generating the three-dimensional object data whose nodes are encoded into a bitstream. The apparatus for encoding three-dimensional object data includes a tree structure generator which generates three-dimensional object data having a tree structure in which nodes are attached labels indicating their types; a merging order selector which merges the nodes of the three-dimensional object data by referring to their labels; a node encoder which encodes merged nodes; and a bitstream generator which generates the three-dimensional object data whose merged nodes are encoded into a bitstream. The method of decoding three-dimensional object data involves reading-continue flag information from a bitstream of encoded three-dimensional object data and decoding the continue flag information; decoding note type information of the bitstream; decoding an ‘S’ node if the note type information indicates that a current node is an ‘S’ node and decoding a PPM node if the note type information indicates that the current node is a PPM node; and restoring the three-dimensional object data whose nodes are encoded to a tree structure. The apparatus for decoding three-dimensional object data includes a bitstream reader which receives a bitstream of encoded three-dimensional object data; a node decoder which decodes the bitstream; and a tree structure restorer which restores decoded nodes to a tree structure.
    • 提供了用于编码和解码由点纹理数据,体元数据或八叉树数据组成的三维对象数据的方法和装置。 编码三维对象数据的方法涉及产生具有树结构的三维对象数据,其中节点附加有指示其类型的标签; 编码三维物体数据的节点; 并将其节点编码为比特流的三维对象数据生成。 用于编码三维对象数据的装置包括一个树结构生成器,其生成具有树结构的三维对象数据,其中节点附加有指示其类型的标签; 合并顺序选择器,通过参照其标签来合并三维对象数据的节点; 编码合并节点的节点编码器; 以及比特流生成器,其生成其合并节点被编码为比特流的三维对象数据。 解码三维对象数据的方法涉及从编码的三维对象数据的比特流读取继续标记信息,并对继续标志信息进行解码; 解码比特流的音符类型信息; 如果音符类型信息指示当前节点是“S”节点并且如果音符类型信息指示当前节点是PPM节点则对PPM节点进行解码,则解码“S”节点; 并将其节点编码的三维对象数据恢复为树结构。 用于解码三维对象数据的装置包括:接收编码的三维对象数据的比特流的比特流读取器; 解码比特流的节点解码器; 以及将解码节点恢复到树结构的树结构恢复器。