User`s manual

Select Region of Interest
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7-4 MS-Q Imager User’s Manual
Select Region of Interest
You can speed up your decode rate and lower your chances of reading the wrong symbol
by narrowing the region of interest—the pixel area that is evaluated during a read attempt.
If your application uses only 1D symbols,you can narrow
the imager’s 640 axis to 200 pixels. Since only a narrow
strip of the imager’s field of view is required to decode a
1D symbol, 200 pixels is sufficient. The area above and
below the 200 pixels is ignored, reducing the amount of
image processing required, and increasing decode speed.
The diagram to the left represents the imager array
(1024 x 640 for far field and 1024 x 640 for near field). In
the default decode zone, all 1024 x 640 pixels are candidates
for decoding.
You can experiment by reading in any of the symbols
below and testing your new decode zone against your application.
Note: This feature applies to SXGA only.
1-Dimensional Symbols Only Small 2-Dimensional Symbols
(1024 x 200 pixels) (480 x 480 pixels)
Medium 2-Dimensional Symbols Large 2-Dimensional Symbols
(512 x 512 pixels) (640 x 640 pixels)
Default 2-Dimensional Symbols (1024 x 640 pixels)
Casts the broadest possible FOV.
1024
640
640
512 X 512