Omron V530-R150E-2 Operation Manual page 209

Improving Reading
9-1-2 Increasing Speed
Normal Mode (QR Code or Data Matrix)
Processing may be slowed down by unnecessary images in the
background. Adjust the field of vision and settings in Image
Adjust/BGS Levels so that unnecessary images are not
included in the background. For Data Matrix reading in Normal
mode, set the background cut level to medium or strong.
Pattern Mode (QR Code or Data Matrix)
The processing speed may be increased by making the changes
below. These changes, however, may result in incorrect reading,
so confirm correct reading operation after the changes are
made.
Make the search region smaller.
Increase the pixel skipping parameter.
Section 9-1
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