Appeal No. 1996-3621
Application No. 08/019,783
data in a vertical direction followed by scaling the skewed
image, and then skewing the image data in a horizontal
direction. The examiner is of the opinion (Answer, pages 5
and 6) that:
While Tabata does perform a scaling process as
part of the skewing process, the reference does not
indicate that the scaling is performed using
interpolation, such as recited in the independent
claims in general, and more specifically recited in
various dependent claims. Searby and Aoki are cited
as showing the conventionality of interpolation
processing as part of a rotation processing . . . To
one of ordinary skill in the art, it would have been
obvious, at the time of the invention, to use the
interpolation processes of Searby and Aoki as the
scaling process of Tabata because of the
conventionality of the use of interpolation
processes as part of a scaling operation and because
each of the systems are for performing the rotation
of image data and include the process of changing
the size of the image data as part of the rotation
process.
Appellant argues (Brief, page 5) that the claimed subject
matter has “V skew, then interpolation, then H skew,” whereas
Tabata has “H skew first, scaling (enlargement or reduction),
and V skew last,” Searby has rotation by a trigonometric
calculation, and then interpolation to find one pixel value
between two rotated lines, and Aoki has rotation by a
trigonometric calculation, and then interpolation of data
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