The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2013
Filed:
Dec. 15, 2011
Yisheng Yao, Sammamish, WA (US);
Ke-cheng Huang, Sammamish, WA (US);
Emmanuel Papirakis, Bellevue, WA (US);
Yisheng Yao, Sammamish, WA (US);
Ke-Cheng Huang, Sammamish, WA (US);
Emmanuel Papirakis, Bellevue, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Described is a technology by which a raster graphics image file (e.g., a PNG) containing pixels having color component data and alpha channel data (e.g., RGBA data) is transcoded into a smaller Palette Indexed format with non-noticeable and/or virtually no loss. Hextrees are used to represent the pixels of the image, such as one hextree for each subset (segment) of the image's pixels, where alpha channel data distribution may be used to determine each segment. A palette containing sets of alpha and color values is generated from the hextrees, with the transcoded image data provided by representing the pixel data as indexes to the palette.