Return the particular element of single-channel array. If the array has multiple channels, runtime error is raised. Note that cvGet*D function can be used safely for both single-channel and multiple-channel arrays though they are a bit slower.

public static double cvGetReal2D(
	IntPtr arr,
	int idx0,
	int idx1
)

Public Shared Function cvGetReal2D ( _
	arr As IntPtr, _
	idx0 As Integer, _
	idx1 As Integer _
) As Double

public:
static double cvGetReal2D(
	IntPtr arr, 
	int idx0, 
	int idx1
)