Appeal No. 1998-0671
Application 08/285,328
This is a decision on appeal under 35 U.S.C. § 134 from the
final rejection of claims 1-14 and 17-19.
We reverse, but enter a new ground of rejection.
BACKGROUND
The invention is directed to an image processing method and
system that uses screening and error diffusion as described in the
Summary of the Present Invention (Brief, pp. 2-3).
Claim 1 is reproduced below.
1. A method of reducing a number of levels in a
multi-level grey scale pixel value representing a pixel and
diffusing an error generated from reducing the number of
levels, comprising the steps of:
(a) receiving the multi-level grey scale pixel value of a
first resolution;
(b) generating a screened multi-level grey scale pixel
value;
(c) reducing the number of levels in the screened
multi-level grey scale pixel value;
(d) generating an error value as a result of the reduction
process in said step (c); and
(e) diffusing the error value to multi-level grey scale
pixel values of adjacent pixels.
THE PRIOR ART
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