public UMat(
	Size size,
	DepthType type,
	int channels,
	UMatUsage usage = UMatUsage.Default
)

Public Sub New ( 
	size As Size,
	type As DepthType,
	channels As Integer,
	Optional usage As UMatUsage = UMatUsage.Default
)

public:
UMat(
	Size size, 
	DepthType type, 
	int channels, 
	UMatUsage usage = UMatUsage::Default
)

new : 
        size : Size * 
        type : DepthType * 
        channels : int * 
        ?usage : UMatUsage 
(* Defaults:
        let _usage = defaultArg usage UMatUsage.Default
*)
-> UMat