9-1
Section
Improving Reading
199
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
•
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.
Before countermeasure
After 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 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.