Emgu CV Library Documentation
DFT Method (type, nonzeroRows)
NamespacesEmgu.CVImage<(Of <(TColor, TDepth>)>)DFT(CV_DXT, Int32)

www.emgu.com/wiki
performs forward or inverse transform of 1D or 2D floating-point array
Declaration Syntax
C#Visual BasicVisual C++
public Image<TColor, float> DFT(
	CV_DXT type,
	int nonzeroRows
)
Public Function DFT ( _
	type As CV_DXT, _
	nonzeroRows As Integer _
) As Image(Of TColor, Single)
public:
Image<TColor, float>^ DFT(
	CV_DXT type, 
	int nonzeroRows
)
Parameters
type (CV_DXT)
Transformation flags
nonzeroRows (Int32)
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
Return Value
The result of DFT

Assembly: Emgu.CV (Module: Emgu.CV) Version: 1.3.0.0 (1.3.0.0)