| US 7,526,125 B2 | ||
| Method of and apparatus for compressing and uncompressing image data | ||
| Robert A. Drebin, Palo Alto, Calif. (US); David Wang, Fremont, Calif. (US); and Christopher J. Migdal, Mountain View, Calif. (US) | ||
| Assigned to Silicon Graphics, Inc., Sunnyvale, Calif. (US) | ||
| Filed on Feb. 11, 2008, as Appl. No. 12/29,406. | ||
| Application 10/674825 is a division of application No. 09/162244, filed on Sep. 28, 1998, granted, now 7,058,218, filed on Jun. 06, 2006. | ||
| Application 12/029406 is a continuation of application No. 10/674825, filed on Oct. 01, 2003, granted, now 7,330,587. | ||
| Prior Publication US 2008/0131008 A1, Jun. 05, 2008 | ||
| Int. Cl. G06K 9/36 (2006.01); G06K 9/00 (2006.01) | ||
| U.S. Cl. 382—166 [382/233] | 5 Claims |
| 1. A method for restoring compressed image data, comprising:
using a computer to perform the following steps:
converting a color cell having a first low bit per pixel color value and a second low bit per pixel color value to a first
high bit per pixel color value and a second high bit per pixel color value, wherein the color cell is compressed;
interpolating between the first high bit per pixel color value and the second high bit per pixel color value to produce a
third high bit per pixel color value and a fourth high bit per pixel color value; and
reconstructing the color cell from luminance-encoded bitmasks, the first high bit per pixel color value, the second high bit
per pixel color value, the third high bit per pixel color value and the fourth high bit per pixel color value.
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