VfSubpixelBlob and VfPixelCounter ROI Integration for Contamination Measurement

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Dear Community,

Hello

I use:
PLC : X20CP1686X
Camera: VSC123R22.041P-000
AS: V 4.12.8.41
mappVision: 5.30.1
mappView: 5.24.5

Objective / Requirements

  • Detect the entire metal plate as a single blob using VfSubpixelBlob and measure the total plate size (area).

  • Restrict the ROI to the detected plate blob region only.

  • Use VfPixelCounter to detect and count dark (black) contamination pixels inside the plate area only.

  • Calculate the contamination level either as:

    • Absolute area (mm²), or

    • Relative ratio (%) with respect to the total plate area.

Questions Regarding Function Chaining / Pipeline Integration

  1. Is it possible to pass the “Region / Contour (mask)” output of VfSubpixelBlob directly to the next Vision Function as an ROI?

  2. If supported, can VfPixelCounter use this Region directly as its ROI (instead of a rectangular ROI)?

  3. If Region transfer is not supported,
    is it possible to dynamically define the VfPixelCounter ROI using the bounding box values
    (Xmin, Xmax, Ymin, Ymax) obtained from VfSubpixelBlob?

    • Can these bounding box values be mapped to the PixelCounter ROI parameters at runtime?

    • Is it possible to apply an additional offset or margin to the ROI?

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Solution was provided by Vision team, refer to Improving image quality of Copper plates in vision camera and Dynamic ROI Adjustment and Pixel Counter for Copper Plate Inspection - #3 by kovarj