Page buffer rotator

Details Page buffer rotator Page buffer rotator

1995-12-01

1997-03-18

Mancuso, Joseph

Image analysis

Image transformation or preprocessing

Changing the image coordinates

395137, G06R 932

Patent

active

056130180

ABSTRACT:
A circuit for performing high-speed 90 and 270 degree rotations of an uncompressed image in a page buffer. The rotation is performed as the data is written into and read from the page buffer, thus requiring no additional time. A special memory mapping technique is used to make efficient use of the page buffer memory.

REFERENCES:
patent: 4635212 (1987-01-01), Hatazawa
patent: 4806920 (1989-02-01), Sawada
patent: 4894646 (1990-01-01), Ryman
patent: 4995089 (1991-02-01), Altrieth, III
patent: 5034733 (1993-07-01), Okazawa et al.
patent: 5111192 (1992-05-01), Kadakia
Ralston et al "Encyclopedia of Computer Science" 3rd Edition, Van Nostrand Reinhold, .COPYRGT.1976 pp. 1420-1423.

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