Appeal No. 1999-2025
Application No. 08/394,212
The disclosed invention is directed to an improvement
upon conventional color image processing apparatuses by
enhancing character formation. Before the invention,
superposed half-tone
dots were sometimes judged during color image processing to be
a character region. This occurred because conventional
processing merely detected edges for individual picture
elements or regions. Appellant’s invention includes color
image processing by, in addition to detecting a picture
element or portion that defines an edge of an image,
discriminating a consecutive alignment of the picture elements
or portions, each of the elements or portions defining the
detected edge. This determines whether the detected edge
elements are a character portion or a picture portion. In a
character portion, for example, 100% UCR (undercolor removal)
may be performed, and nearly all the black formed by the three
colors of yellow, magenta, and cyan in that portion is
replaced with black ink. In a half-tone portion, 50% UCR may
be performed, in which case all outputs, Y3, M3, C3, and K3
(Fig. 1 of disclosure) are reduced by one-half. Intermediate
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