ALEXANDRIA, Va., March 24 -- United States Patent no. 12,586,250, issued on March 24, was assigned to Imagination Technologies Ltd. (Kings Langley, Great Britain).
"Compression and decompression of sub-primitive presence indications for use in a rendering system" was invented by Simon Fenney (St. Albans, Great Britain) and Alper Ozkan (Hertfordshire, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method and a compression unit are provided for compressing, into a block of compressed data, a block of sub-primitive presence indications for use in intersection testing in a rendering system. An ordered set of patches is obtained which represents the presence indications in the block of sub-primiti...