Appeal No. 96-1268
Application 08/013,739
said predetermined value occur with respect to all each of said plurality of lines
in the plurality of radial directions,
with respect to each of the plurality of lines in the plurality of radial directions,
determining that the region, which extends from a point on the recording medium associated with
each of the differentiated values judged to be increasing beyond said predetermined value to the
corresponding contour point, is an effective image region,
iv) in cases where it has been judged at step ii that differentiated values increasing beyond
said predetermined value occur with respect to at least a predetermined number of lines among
the plurality of lines in the plurality of radial directions,
a) making judgments as to whether or not the image signal components corresponding to
positions on the recording medium located along each of the plurality of lines in radial directions,
for which the differentiated values increasing beyond said predetermined value do not occur, are
uniform
b) when it has been judged at step iv) a) that the image signal components are
uniform,with respect to each of the plurality of lines in radial directions, for which the
differentiated values increasing beyond said predetermined value occur, determining that the
region, which extends from a point on the recording medium associated with each of the
differentiated values Judged to be increasing beyond said predetermined value to the
corresponding contour point, is an effective image region, and
v) determining that said effective image region is the irradiation field.
The Examiner relies on the following references:
Shimura 4,967,079 Oct. 30, 1990
Funahashi 4,977,504 Dec. 11, 1990
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