Narrow width: This refers to the width of the unit bar.
Module width: Refers to the width of the narrowest bar module.
Level Error correction：the Error-Checking Level of PDF417 barcode, from 0
to 8.
Lines and Columns: the lines and Columns of PDF417 barcode.
Fig. 4-21 PDF417 Barcode
4.8.2.2.2. DataMatrix Barcode
DataMatrix is a kind of two-dimensional barcode based on Matrix, as shown in
Fig. 4-22:
Data Matrix has various fixed size, and users can choose what they want have.
If the smallest size is chosen
，the system will
automatically select the smallest frame to fit the all text users
Data Matrix has various fixed size, and users can choose what they want have.
If the smallest size is chosen ，the system will automatically select the smallest
frame to fit the all text users
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