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4600rp, 4600g/4600r, 4800i User’s Guide
Centering
Use Centering to narrow the imager’s field of view to make sure the imager reads
only those barcodes intended by the user. For instance, if multiple codes are
placed closely together, centering will insure that only the desired codes are
read. (Centering can be used in conjunction with
Aimer Delay
, page 3-10, for
the most error-free operation in applications where multiple codes are spaced
closely together. Using the Aimer Delay and Centering features, the imager can
emulate the operation of older systems, such as linear laser barcode imagers.)
In the example below, the gray area is the full imager field of view and the white
area is the centering window. Barcode 1 will not be read, while Barcode 2 will
be.
The default centering window is a 128x96 pixel area in the center of the imager’s
field of view. The following diagram illustrates the default top, bottom, left, and
right pixel positions, measured from the top and the left side of the imager’s field
of view, which is 640 by 480 pixels.
If a barcode is not within the predefined window, it will not be decoded or output
by the imager. If centering is turned on by scanning
Centering
On
, the imager
only reads codes that intersect the centering window you specify using the
Top
,
Bottom
,
Left
, or
Right
barcodes.
Barcode 1
Barcode 2
0
100%
100%
Default
Center
40%
60%
40%
60%
Left
Right
Bottom
Top
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