IMAGE ROTATION Method Under VIRTUAL IMAGE MANAGEMENT
Original Publication Date: 1986-Jun-01
Included in the Prior Art Database: 2005-Mar-09
This article describes a new method of an image rotation using the blocking of a virtual image area. ROTATION is one of the most important functions of image manipulation. In recent years, with an increase in the resolution of an image, the data volume of the image became very large number (for example, a 240-pel letter size image had about 700K bytes). Therefore, a full page image can not be put on a PC memory area. In order to handle such an image, the VIRTUAL IMAGE MANAGEMENT has been developed. Roughly speaking, virtual image management handles an image by dividing it into image strips (Fig. 1). The full page image is saved on a diskette or a fixed disk, to read a necessary image strip onto a memory, manipulate it, and write an image strip if a memory becomes full.