Barcode Reader FAQs

Why is the Code Read control empty?

Make sure Barcode Type is set correctly and the region of interest (ROI) encloses all of the bars.

Can I adjust the parameters for finding the bars?

No. The algorithm that Barcode Reader uses is adaptive and can find the bars even when the image contains a slight light drift along the barcode.

The string returned by the algorithm does not match the code written below the barcode.

If the type of barcode is Codabar, Code 128, EAN 8, EAN 13, or UPCA, enable the Add Special Characters to Code control. You also can enable the Add Checksum to Code control.