What to Expect from 2D Code Recognition

NI Vision 2019 for LabVIEW Help

Edition Date: March 2019

Part Number: 370281AG-01

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The following factors can cause errors in the search and decoding phases or 2D code recognition:
  • Very low resolution of the image.
  • Very high horizontal or vertical light drift.
  • Contrast along the bars of the image.
  • High level of noise or blurring.
  • Inconsistent printing or stamping techniques, such as misaligned code elements, inconsistent element size, or elements with inconsistent borders.
  • In PDF417 codes, a quiet zone that is too small or contains too much noise.


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