Method and apparatus for the fast rotation of an image

Details Method and apparatus for the fast rotation of an image Method and apparatus for the fast rotation of an image

1996-03-27

1999-03-30

Shalwala, Bipin

Image analysis

Image transformation or preprocessing

Changing the image coordinates

382293, 382297, 345126, 348583, 3582611, G06K 932, G09G 504, H04N 974, H04N 1419

Patent

active

058898930

ABSTRACT:
The present invention is a method and apparatus for the fast rotation of binary images represented as a run length encoded data stream. The system employs a cache memory for efficiently representing parsed RLE data in a rotated orientation, where only the white-black transition points are recorded. Subsequently, the cache memory is further processed using a logic operation to fill in the runs between the recorded transition points during concurrent transfer of the image data to a band of page buffer memory. The process is repeated for a plurality of bands to complete the rotation/decoding process for an entire bitmap image.

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patent: 5245441 (1993-09-01), Ruben
patent: 5504591 (1996-04-01), Dujari

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