Browse Prior Art Database

FAST SMALL-ANGLE BITMAP ROTATION

IP.com Disclosure Number: IPCOM000026586D
Original Publication Date: 1992-Oct-31
Included in the Prior Art Database: 2004-Apr-06

Publishing Venue

Xerox Disclosure Journal

Abstract

It is commonly known that a bitmap image may be rotated by an angle 0 according to the the following equations: newx = x* cos 0 - y*sin 0, and newy = x*sin 0 + y*cos 0. Unfortunately, rotation using these equations becomes extremely computationally intensive. Because bit-map image rotation is a desirable feature in image processing environments, it is advantageous to accomplish the rotation in a more efficient manner.