Seat Mount

1. Add EnumerateImages filter to the ACQUIRE section to get load consecutive images of some disk directory.

2. In section PROCESS add LocateSingleObject_Edges1 filter to find a location of the object.

   • Click the "..." button at the inEdgeModel input to open the GUI for creating template matching models.
   • Select the template region which should contain characteristic edges of the object, but should be not too big.
   • The rotation of the object is in specified range, therefore you can narrow the expected rotation by setting:
     • in Expert Complexity Level: inMinAngle to -30 and inMaxAngle to 30,
     • in Basic Complexity Level: Rotation Tolerance to 60.
   • To speed up locating an object, click the "..." button at the inSearchRegion and select a region of possible object centers.
   • Set inMaxPyramidLevel to 2.
   • To specify the minimum strength of edges used for matching, set inEdgeThreshold to 120.
   • Set inMinScore to 0.850.

3. Create Step macrofilter DetectHole by right-clicking on empty space in Program Editor and selecting "Add New Step Here...". This macrofilter will detect center of the hole within input region of interest.
   Create three inputs: one of type Image called Image, second of type Rectangle2D called Roi and third of type CoordinateSystem2D called RoiAlignment.

   • Connect Image with outImage.
   • Connect RoiAlignment with outObject.Alignment.

4. Click the "..." button at the inRoi input in the Properties window, to open the GUI for selecting a ROI. Select the rectangular region containing the first required hole.
   .

5. Inside this macrofilter:

   1. Right-click on the inImage input, select "Property Outputs" and choose Width and Height from the list. Two additional inputs will be available on the top bar.

   2. Add CreateRectangleRegion filter to create a rectangular region for the next steps of the algorithm. Connect its inputs:

      • inRectangleAlignment with inRoiAlignment, which is the reference CoordinateSystem2D.
      • inRectangle with inRoi.
      • Connect inFrameWidth and inFrameHeight with inImage property outputs Width and Height previously uncovered.

   3. Add ThresholdToRegion filter to create a region containing pixels of the hole. Connect its inputs inRoi with CreateRectangleRegion output outRegion.

   4. Add RegionMassCenter filter to compute a center of the hole.

   5. Create the macrofilter's output outHoleCenter and connect it with outMassCenter.

   6. Create the macrofilter's output outAlignedRoi and connect it with outAlignedRectangle.

   7. Create the macrofilter's output outHoleRegion and connect it with ThresholdToRegion's output outRegion.

6. Add another DetectHole macrofilter and set its inputs inImage, inRoiAlignment, inFrameWidth and inFrameHeight as in previous steps.

7. Select the rectangular region containing the second required hole. .

8. Add PointToPointDistance filter and connect its inputs with outputs of both instances of the DetectHole macrofilter. The output outDistance is desired result of this program.

Macrofilter Main

Macrofilter DetectHole