ALEXANDRIA, Va., June 16 -- United States Patent no. 12,309,367, issued on May 20, was assigned to GOOGLE LLC (Mountain View, Calif.).
"Bicriteria block splitting heuristic for lossy compression" was invented by Jyrki Alakuijala (Wollerau, Switzerland) and Luca Versari (Zurich).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for partitioning a block of an image to reduce quantization artifacts includes estimating an expected entropy of the block; partitioning the block into sub-blocks, where each sub-block having a size of a smallest possible partition size; calculating respective amounts of visual masking for the sub-blocks; selecting, as a visual masking characteristic of the block, a highest visual...