OCV Tool parameters include controls for Defect Detection, Filtering, and Settings.
Click the Defect Detection area of the OCV Tool parameters to display controls for Tolerance and Units (Percentage of total symbol size, or an absolute value in Pixels). You can also determine whether the tool bases defects on Total Residue Area or Largest Blob, or set it to Check Minimum Contrast, which rejects any symbol whose contrast falls below 50% of the trained symbol’s contrast.
Total Residue Area: Judges whether the total area of the difference image is within the set judgment value.
Tolerance of Total Residue Area: Sets the judgment value of the area of the difference image. (Range: 0-100% or 0-10000000 pixels)
Largest Blob: Determines whether the area of the maximum blob in the difference image is within the set tolerance.
Tolerance of Largest Blob: Sets the judgment value for the maximum blob area of the difference image. (Range: 0-100% or 0-10000000 pixels)
Check Minimum Contrast: Symbols with a symbol contrast less than 50% of the trained symbol contrast are considered defective.
Unit: Set the unit of tolerance when judging the above total difference area and maximum blob area.
[Percentage]: Judgment is made as a relative value (percentage) when the area of the symbol during training is set to 100%.
[Pixels]: Judgment is made based on the area value in pixels.
Click the Filtering area of the OCV Tool parameters to display controls for Minimum Symbol Size and Residue Cleanup.
Click the Settings area of the OCV Tool parameters to display controls for Polarity, Single Symbol, and AutoFind the Symbols.