Appeal No. 1996-3621
Application No. 08/019,783
the vertically skewed image is interpolated to form an
interpolated vertically skewed image. Finally, the
interpolated vertically skewed image is skewed in a horizontal
direction by a horizontal skew to form a rotated image.
Claim 1 is illustrative of the claimed invention, and it
reads as follows:
1. In a system for rotating a stored image by a given
angle of rotation, a method comprising:
scanning a plurality of input points of an original
of said image for reading a plurality of input image
pixels corresponding to said image, wherein said
scanning defines a horizontal direction as the
direction of said scanning forming a plurality of
horizontal scan lines of input image pixels, and
defines a vertical direction as substantially
perpendicular to said horizontal direction;
storing said plurality of input image pixels in a memory
to
form said stored image, wherein said input image
pixels are stored in said memory such that adjacent
pixels in a given memory location are in
substantially the same order as said plurality of
input image pixels along said horizontal direction;
skewing said stored image in a vertical direction by
a
vertical skew to form a vertical skewed image;
interpolating said vertical skewed image to form an
interpolated vertical skewed image; and
2
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