Appeal No. 1997-2406
Application 08/170,651
offsets defining a basic array of N sample points distributed substantially over the area of a pixel
of said filtered pixel array, which basic array of N sample points is applicable to each pixel of
said filtered pixel array; and
combining the N intermediate pixel arrays to generate said filtered pixel array
constituting an image which has been oversampled and filtered;
wherein the N offsets are obtained by:
selecting a class of image feature for filtering; and
determining the locations of the N sample points of the basic array in dependence upon
the selected class of image feature so as to ensure substantially N times oversampling of the
selected class of image feature;
wherein the selected class of image feature comprises edges, which are nearly aligned
with one of the other of the principal axes of the filtered pixel array, the locations of the N
sample points in the basic array being chosen so as to divide the area of a pixel of the filtered
pixel array at substantially N places in the direction of at least one of the principal axes of the
filtered pixel array.
The Examiner relies on the following references:
Vreeswijk et al. (Vreeswijk) 5,043,810 Aug. 27, 1991
Appellant's admitted prior art (Appellant's spec. page 1, line 4 - page 3, line 5)2
Claims 1, 3 through 10, 13 and 16 through 18 stand rejected under 35 U.S.C.§ 103 as
being unpatentable over the admitted prior art and Vreeswijk.
2Cook et al. (Cook) 2, 177,577A, United Kingdom patent application, filed June 1986.
Henry Fuchs, et al.(Fuchs), "Fast Spheres, Shadows, Textures, Transparencies, And
Image Enhancements In Pixel-Planes," 19 Computer Graphic , no. 3, 111-120 (July
22-26, 1985).
3
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