US 7,372,990 B2
Texture image compressing device and method, texture image decompressing device and method, data structures and storage medium
Yasunobu Yamauchi, Kanagawa-ken (Japan); Shingo Yanagawa, Kanagawa-ken (Japan); Masahiro Sekine, Kanagawa-ken (Japan); Takeshi Nagai, Saitama-ken (Japan); Hideyuki Uneo, Kanagawa-ken (Japan); and Nakaba Kogure, Kanagawa-ken (Japan)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan)
Filed on Jan. 28, 2004, as Appl. No. 10/765,122.
Claims priority of application No. P2003-021423 (JP), filed on Jan. 30, 2003.
Prior Publication US 2004/0252892 A1, Dec. 16, 2004
Int. Cl. G06K 9/36 (2006.01)
U.S. Cl. 382—166  [382/167; 382/232; 345/582] 17 Claims
OG exemplary drawing
 
1. A texture image compressing device comprising:
a separating unit configured to rearrange a plurality of texture images corresponding to a plurality of different light source directions and a plurality of different view point directions into a plurality of rearranged texture images by grouping pixels included in the plurality of texture images per view point direction and coordinate on each of the texture images, and separate intensity maps including intensity values and light source-independent texture images including color components from the plurality of rearranged texture images;
an intensity map compressing unit configured to compress the intensity maps to generate compressed intensity maps and representative intensity maps that are codebooks of the compressed intensity maps;
a light source-independent texture image compressing unit configured to compress the light source-independent texture images to generate light source-independent texture compressed images and color component conversion tables that are codebooks of the light source-independent texture compressed images; and
a compressed texture generating unit configured to generate compressed textures by combining the compressed intensity maps, the representative intensity maps, the light source-independent texture compressed images and the color component conversion tables.