Canon DR-2580C Service Manual page 55

• Processing only by single image data
In case of scan area specification, the
front area is different from the back area.
In case of the flatbed, only one side exists.
Thus, binder holes are removed as fol-
lows.
This machine determines the objects as
binder holes and deletes those if the de-
grees of circularity* of such objects which
exist in a target image area (20 mm
around) exceed 0.8.
However, the objects whose area is 10
2
mm or less are excluded
* Degree of circularity = (area × 4π)
/(circumference)
COPYRIGHT © 2005 CANON ELECTRONICS INC.
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2
CANON DR-2580C FIRST EDITION APR. 2005
CHAPTER 2 FUNCTION & OPERATION
10) Blank Skip
Judgment as to whether or not to record a
document is determined by comparing the
actual number of picture elements of the
document with the user-preset percent-
age (0% to 20%) of number of black pic-
ture elements.
However, the margin of an image data
(10% of lengths of each side edge) is ex-
cluded. Thus, the number of black picture
elements in the central area is compared
with the user-defined number of black
picture elements. If the number of black
picture elements in this target area ex-
ceeds the predefined number, the data
are recorded. If not, the data are not re-
corded.
10%
Target area
Figure 2-527
10%
10%
10%
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