Banner PresencePLUS BCR 1.3 Series - Manual (Page 154)

Additional Information Description Thresholding Type
the default, the software
automatically chooses the
grayscale threshold level for
the bimodal image.
Note: this threshold
assumes that the image
is bimodal.
If you select Fixed from the
drop-down list, you need to Fixed
enter the Lower Reject and
Threshold (see the example
below).
Note: If the Print
Contrast is set to Bright
on dark, then the Lower
Reject and Thresholds
will be the opposite.
If you select Uniformly
Changing, then the grayscale Uniformly Changing
contrast of the image changes
along the read direction of the
ROI in uniform increments (up
or down) over the units
indicated in the Box count
field. The default box count is
16. Use the arrow controls to
adjust as apppropriate.
Note: The Box count
integer is close to the
number of characters in
the image. A good
starting point is the
number of characters in
the image.
If you select Non-uniformly
Changing, then the grayscale Non-uniformly Changing
contrast of the image varies
irregularly along the read
direction of the ROI. The
default box count is 16. Use
the arrow controls to adjust as
apppropriate.
P/N 000000 Banner Engineering Corp. - Minneapolis, MN USA - www.bannerengineering.com
Tel: 763.544.3164
154
7/2009 PresencePLUS Software Tools