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Datamatrix - Low Resolution and Super Fast parameters

Aim:

This example shows how low-resolution Datamatrix codes can be successfully decoded in Aurora Vision Studio by using the SuperResolution functionality. Additionally, the example presents how SuperFast option can reduce processing time.

Input:

An image containing a Datamatrix code. The position of the Datamatrix is variable. The Datamatrix has low resolution.

Output:

Detected Datamatrix, decoded text, and processing time comparison.

Hints:

Labeling connections is explained in this article. Time measurement can be done with the StartClock and the GetClockTime tools.

Solution (AVS):

  1. Add the EnumerateImages to the ACQUIRE section to get images from a directory.

  2. In the PROCESS section, add the StartClock filter.

  3. Add the ReadSingleDatacode filter to detect and recognize a Datamatrix. Connect it to the EnumerateImages outImage output.

  4. Expand the inCodeParams in the Properties:

    • Set the Polarity parameter to Dark.
    • Set the MinRowCount parameter to 20.
    • Set the MaxRowCount parameter to 30.
    • Set the MinColumnCount parameter to 20.
    • Set the MaxColumnCount parameter to 30.
    • Set the MinModuleSize parameter to 1.1.
    • Set the MaxModuleSize parameter to 3.

  5. Expand the inDetectionParams in the Properties.

    • Set the ContrastThreshold parameter to 4.
    • Set the PyramidStrategy parameter to Extended.
    • Set the OutlineStrategy parameter to SuperFast.
    • Set the EdgeTracker parameter to Medium.
    • Set the UseSuperRes parameter to True.

  6. Add the GetClockTime filter. Connect its input to the the StartClock output.

  7. Add a new instance of the StartClock filter.
  8. Copy the ReadSingleDatacode filter and paste it after the new StartClock filter.
    • Expand the inDetectionParams in the Properties.
    • Change the OutlineStrategy parameter to Precise

  9. Add a new instance of the GetClockTime filter. Connect its input to the the second StartClock output.

  10. Show the decoded text and the measured processing times on a new preview window.

Macrofilter Main.