Appeal No. 1997-4067
Application 08/285,324
distributed to adjacent pixels, but merely affects the total
amount of error available to be distributed. On the other
hand, the present invention claims that the weighting
coefficients are changed, and thus, the channels of
distribution themselves are affected." Appellants
characterize Kanno as a static distribution process because
the distribution of error to surrounding pixels cannot be
changed.
We agree with Appellants that changing the error in
Kanno does not meet the limitations of distributing a
weighted portion of the error based on first and second sets
of weighting coefficients. Kanno only has a single set of
weighting coefficients. Kanno does not operate to produce
the same results as the claimed invention because the
distribution of error to surrounding pixels cannot be
changed by using different sets of coefficients.
Furthermore, we note that when a pixel is present in a text
region in Kanno, the compensation error signal (CE) is zero,
so the product of CE and the weighing coefficients will be
zero, and no weighted portion of the error will be
distributed to surrounding pixels. This is like Appellants'
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