Method and apparatus for rotating image data

Details Method and apparatus for rotating image data Method and apparatus for rotating image data

G - Physics

06

T

G06T 3/60 (2006.01) G06T 1/60 (2006.01)

Patent

CA 2252751

It is intended to reduce capacity of an image memory used for rotation of image data, and to shorten processing time. The image data rotating method uses an image memory capable of storing n × n pixels, and, for consecutive two pages in image data with the same size of a plurality of pages to be rotated, reads image data in a former page written in said image memory from each storage area at each address of said image memory in a predetermined order of reading according to the angle of 90 degrees to be rotated every k pixels for one line and every k lines for all lines; and writes image data in the latter page in the same storage area at the same address of said image memory in the predetermined order.

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