Patent ID: 8390622

Claim:
A depth image-based 3D object representing apparatus including at least one processing device, the apparatus comprising: a shape information generator using the at least one processing device to generate shape information for an object by dividing an octree containing the object into 8 subcubes until each subcube becomes smaller than a predetermined size and defining the divided subcubes as children nodes; a reference image determiner to determine a reference image containing a color image for each cube divided by the shape information generator; an Index generator to generate index information of the reference image corresponding to the shape information; a node generator to generate octree nodes including the shape information, the index information and the reference image; and an encoder to encode the octree nodes to output bitstreams, wherein the octree nodes have a node structure, the node structure including: an octreeResolution field in which a maximum value of octree leaves along the side of an enclosing cube containing the object is recorded; an octree field in which a structure of an internal node of the octree is recorded; a voxelImageIndex field in which indices for octree voxels of the reference image corresponding to the internal node is recorded; and an image field in which the reference image is recorded, and wherein the reference image is divided into blocks and wherein the apparatus further comprises a preprocessor to preprocess pixels in the boundary between blocks in the reference image and providing the preprocessed pixels to the reference image determiner, the preprocessor comprising: an expanding portion to expand pixels to the background using the average color of blocks and fast decay in intensity; and a compressing portion to perform block-based compression on the reference image to then squeeze the distortion into the background.