Emgu CV Library Documentation
cvMinAreaRect2 Method (points, storage)
NamespacesEmgu.CVCvInvokecvMinAreaRect2(IntPtr, IntPtr)

www.emgu.com/wiki
Finds a circumscribed rectangle of the minimal area for 2D point set by building convex hull for the set and applying rotating calipers technique to the hull.
Declaration Syntax
C#Visual BasicVisual C++
public static MCvBox2D cvMinAreaRect2(
	IntPtr points,
	IntPtr storage
)
Public Shared Function cvMinAreaRect2 ( _
	points As IntPtr, _
	storage As IntPtr _
) As MCvBox2D
public:
static MCvBox2D cvMinAreaRect2(
	IntPtr points, 
	IntPtr storage
)
Parameters
points (IntPtr)
Sequence of points, or two channel int/float depth matrix
storage (IntPtr)
temporary memory storage
Return Value
a circumscribed rectangle of the minimal area for 2D point set

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