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:
Feb. 24, 2015
Filed:
Sep. 21, 2011
Brijesh Tripathi, San Jose, CA (US);
Craig M. Okruhlica, San Jose, CA (US);
Wolfgang Roethig, San Jose, CA (US);
Brijesh Tripathi, San Jose, CA (US);
Craig M. Okruhlica, San Jose, CA (US);
Wolfgang Roethig, San Jose, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A dither unit with a programmable kernel matrix in which each indexed location/entry may store one or more dither values. Each dither value in a respective entry of the kernel matrix may correspond to the number of bits that are truncated during dithering. During dithering of each pixel of an image, entries in the kernel matrix may be indexed according to the relative coordinates of the pixel within the image. A dither value for the pixel may be selected from the indexed entry based on the truncated least significant bits of the pixel component value. When the kernel matrix is storing more than one dither value per entry, the dither value may be selected based further on the number of truncated least significant bits. A dithered pixel component value may then be generated according to the dither value and the remaining most significant bits of the pixel component value.