Omron V530-R150E-2 Operation Manual page 211

Improving Reading
9-1-4 Countermeasure Examples
The following are only a selection of examples of possible coun-
termeasures. Reading operation will not necessarily be
improved by performing the following operations and so execute
a reading to confirm correct operation.
Dot Codes
Try the following countermeasures to improve reading of codes
made up of dots, in Normal mode (QR Code or Data Matrix).
Countermeasures
Before countermeasure
Hollowing of Dots
Try the following countermeasures when dots appear "hol-
lowed," i.e., the centers of dot images are white.
Countermeasures
The influence of dots can be reduced by increasing the field of
vision and thereby decreasing the size of the code image.
The influence of dots can be reduced using the smoothing
function. For Data Matrix reading in Normal mode, the influ-
ence of dots can be further reduced by turning ON Filtering
Retry.
Try reading in Pattern Mode.
The influence of hollowing can be decreased by increasing the
field of vision and thereby decreasing the size of the code
image.
The influence of hollowing can be decreased using the
smoothing function.
Section
After countermeasure
9-1
199