CvInvokeDft Method

public static void Dft(
	IInputArray src,
	IOutputArray dst,
	DxtType flags,
	int nonzeroRows
)

Public Shared Sub Dft ( 
	src As IInputArray,
	dst As IOutputArray,
	flags As DxtType,
	nonzeroRows As Integer
)

public:
static void Dft(
	IInputArray^ src, 
	IOutputArray^ dst, 
	DxtType flags, 
	int nonzeroRows
)

static member Dft : 
        src : IInputArray * 
        dst : IOutputArray * 
        flags : DxtType * 
        nonzeroRows : int -> unit 

Parameters

src

Type: Emgu.CVIInputArray
Source array, real or complex

dst

Type: Emgu.CVIOutputArray
Destination array of the same size and same type as the source

flags

Type: Emgu.CV.CvEnumDxtType
Transformation flags

nonzeroRows

Type: SystemInt32
Number of nonzero rows to in the source array (in case of forward 2d transform), or a number of rows of interest in the destination array (in case of inverse 2d transform). If the value is negative, zero, or greater than the total number of rows, it is ignored. The parameter can be used to speed up 2d convolution/correlation when computing them via DFT. See the sample below

Reference