Emgu CV Library Documentation
cvPointPolygonTest Method (contour, pt, measureDist)
NamespacesEmgu.CVCvInvokecvPointPolygonTest(IntPtr, PointF, Boolean)

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Determines whether the point is inside contour, outside, or lies on an edge (or coinsides with a vertex). It returns positive, negative or zero value, correspondingly
Declaration Syntax
C#Visual BasicVisual C++
public static double cvPointPolygonTest(
	IntPtr contour,
	PointF pt,
	bool measureDist
)
Public Shared Function cvPointPolygonTest ( _
	contour As IntPtr, _
	pt As PointF, _
	measureDist As Boolean _
) As Double
public:
static double cvPointPolygonTest(
	IntPtr contour, 
	PointF pt, 
	bool measureDist
)
Parameters
contour (IntPtr)
Input contour
pt (PointF)
The point tested against the contour
measureDist (Boolean)
If true, the function estimates distance from the point to the nearest contour edge
Return Value
When measureDist == false, the return value is >0 (inside), <0 (outside) and =0 (on edge), respectively. When measureDist == true, it is a signed distance between the point and the nearest contour edge

Assembly: Emgu.CV (Module: Emgu.CV) Version: 1.5.0.0 (1.5.0.0)