public Mat Canny(
	double threshold1,
	double threshold2,
	int apertureSize = 3,
	bool L2gradient = false
)

Public Function Canny ( 
	threshold1 As Double,
	threshold2 As Double,
	Optional apertureSize As Integer = 3,
	Optional L2gradient As Boolean = false
) As Mat

public:
Mat^ Canny(
	double threshold1, 
	double threshold2, 
	int apertureSize = 3, 
	bool L2gradient = false
)

member Canny : 
        threshold1 : float * 
        threshold2 : float * 
        ?apertureSize : int * 
        ?L2gradient : bool 
(* Defaults:
        let _apertureSize = defaultArg apertureSize 3
        let _L2gradient = defaultArg L2gradient false
*)
-> Mat