Appeal No. 1997-4067
Application 08/285,324
This is a decision on appeal under 35 U.S.C. § 134 from
the final rejection of claims 1-15.
We reverse.
BACKGROUND
The invention is directed to an image processing method
and system that uses dynamic error diffusion, i.e., the
error generated from binarizing the value of a pixel is
diffused to adjacent pixels based on dynamic selection of a
set of weighting coefficients from a plurality of possible
weighting coefficient sets depending on the characteristics
of the image.
Claims 1 and 14 are reproduced below.
1. A method of diffusing an error generated from
thresholding a grey level value representing a pixel,
comprising the steps of:
(a) assigning an image characteristic to a pixel
within an image;
(b) thresholding said pixel;
(c) generating an error value as a result of the
threshold process in said step (b);
(d) selecting a set of weighting coefficients from
a plurality of possible weighting coefficient sets
based on the assigned image characteristic of said
pixel; and
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