CogFindCircle CaliperProjectionLength Property Cognex VisionPro
The length of each caliper region along the caliper projection direction. Specified in units of the selected space of the input image.

Namespace: Cognex.VisionPro.Caliper
Assembly: Cognex.VisionPro.Caliper (in Cognex.VisionPro.Caliper.dll) Version: 65.1.0.0
Syntax
Copy to ClipboardPrint
public double CaliperProjectionLength { get; set; }

Property Value

Type: Double
Events
Event TypeReason
CogFindCircle Changed

Fires when the value of this property changes.

The following state flag may be affected:

Exceptions
ExceptionCondition
ArgumentException

The supplied value is less than or equal to 0.

Remarks

The length of each caliper region along the caliper projection direction. Specified in units of the selected space of the input image.

Default Value: 10

Examples
Copy to ClipboardPrint
Imports Cognex.VisionPro
Imports Cognex.VisionPro.Caliper
Imports Cognex.VisionPro.ImageProcessing

' Create a CogFindCircle operator and a results object
Dim myFCO As New CogFindCircle
Dim myArc As New CogCircularArc
Dim myFCOResults As New CogFindCircleResults
Dim i As Integer

' Configure the CogFindCircle Object
myFCO.ExpectedCircularArc = myArc
myFCO.CaliperRunParams.FilterHalfSizeInPixels = 3
myFCO.NumCalipers = 10
myFCO.CaliperProjectionLength = 25
myFCO.CaliperSearchLength = 35
myFCO.CaliperSearchDirection = CogFindCircleSearchDirectionConstants.Inward
myFCO.DecrementNumToIgnore = True
myFCO.RadiusConstraint = myArc.Radius
myFCO.RadiusConstraintEnabled = True

' Execute it
myFCOResults = myFCO.Execute(CType(myAFT.OutputImage, CogImage8Grey))
  ' Display the found circle
CogDisplay1.StaticGraphics.Clear()
CogDisplay1.StaticGraphics.Add(myFCOResults.GetCircle.CopyBase(CogCopyShapeConstants.All), "")

' Display some information about the result
lblRes.text = "Points found; " & myFCOResults.NumPointsFound _
                & " points used; " & myFCOResults.NumPointsUsed _
                & " RMS error: " & myFCOResults.RMSError

' And display some information about each individual result

For i = 0 To myFCOResults.Count - 1
  LstRes.Items.Add("Point (" & myFCOResults(i).X.ToString & ", " & myFCOResults(i).Y.ToString _
            & ") Found: " & myFCOResults(i).Found & " Used: " & myFCOResults(i).Used _
            & " is " & myFCOResults(i).DistanceToCircle & " from found shape.")
Next i
Copy to ClipboardPrint
using Cognex.VisionPro;
using Cognex.VisionPro.Caliper;
using Cognex.VisionPro.ImageProcessing;


// Create a CogFindCircle operator and a results object
  CogFindCircle myFCO = new CogFindCircle();
  CogCircularArc myArc = new CogCircularArc();
  CogFindCircleResults myFCOResults = new CogFindCircleResults();
  int i;

// Configure the CogFindCircle Object
myFCO.ExpectedCircularArc = myArc;
myFCO.CaliperRunParams.FilterHalfSizeInPixels = 3;
myFCO.NumCalipers = 10;
myFCO.CaliperProjectionLength = 25;
myFCO.CaliperSearchLength = 35;
myFCO.CaliperSearchDirection = CogFindCircleSearchDirectionConstants.Inward;
myFCO.DecrementNumToIgnore = true;
myFCO.RadiusConstraint = myArc.Radius;
myFCO.RadiusConstraintEnabled = true;

// Execute it
myFCOResults = myFCO.Execute((CogImage8Grey)myAFT.OutputImage );
// Display the found circle
CogDisplay1.StaticGraphics.Clear();
CogDisplay1.StaticGraphics.Add(myFCOResults.GetCircle().CopyBase(CogCopyShapeConstants.All), "");

// Display some information about the result
lblRes.Text = "Points found; " + myFCOResults.NumPointsFound  
                + " points used; " + myFCOResults.NumPointsUsed  
                + " RMS error: " + myFCOResults.RMSError;

// And display some information about each individual result 

for (i = 0; i < myFCOResults.Count; i++)
  {
  LstRes.Items.Add("Point (" + myFCOResults[i].X  + ", " + myFCOResults[i].Y   
            + ") Found: " + myFCOResults[i].Found + " Used: " + myFCOResults[i].Used  
            + " is " + myFCOResults[i].DistanceToCircle + " from found shape.");
  }
See Also
CogFindCircle Class
Cognex.VisionPro.Caliper Namespace