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. 30, 2001
Filed:
Dec. 03, 1998
Joshua Robey, Hollis, NH (US);
Mark Busa, Needham, MA (US);
Oak Technology, Inc., Sunnyvale, CA (US);
Abstract
A method and apparatus for assisting in the rotation of digital images is described. The digital image is divided by a separate process into image blocks which are rotated through a predetermined angle. Data moving hardware then processes the image blocks to determine the proper placement of each block in a frame buffer to create a properly rotated image. A set of predetermined values based on characteristics of the input image and the predetermined output image format is provided to the data moving hardware from a value processor. The data moving hardware performs only additions and subtractions. The only multiplication necessary for the method is performed by the processor prior to placement of the rotated image blocks in an output frame buffer. Thus the rate of processing the rotated image blocks is significantly improved.