| Cv2Idft Method |
Performs an inverse Discrete Fourier transform of 1D or 2D floating-point array.
Namespace:
OpenCvSharp
Assembly:
OpenCvSharp (in OpenCvSharp.dll) Version: 1.0.0
Syntax public static void Idft(
InputArray src,
OutputArray dst,
DftFlags flags = DftFlags.None,
int nonzeroRows = 0
)
Public Shared Sub Idft (
src As InputArray,
dst As OutputArray,
Optional flags As DftFlags = DftFlags.None,
Optional nonzeroRows As Integer = 0
)
public:
static void Idft(
InputArray^ src,
OutputArray^ dst,
DftFlags flags = DftFlags::None,
int nonzeroRows = 0
)
static member Idft :
src : InputArray *
dst : OutputArray *
?flags : DftFlags *
?nonzeroRows : int
(* Defaults:
let _flags = defaultArg flags DftFlags.None
let _nonzeroRows = defaultArg nonzeroRows 0
*)
-> unit
Parameters
- src
- Type: OpenCvSharpInputArray
The source array, real or complex - dst
- Type: OpenCvSharpOutputArray
The destination array, which size and type depends on the flags - flags (Optional)
- Type: OpenCvSharpDftFlags
Transformation flags, a combination of the DftFlag2 values - nonzeroRows (Optional)
- Type: SystemInt32
When the parameter != 0, the function assumes that
only the first nonzeroRows rows of the input array ( DFT_INVERSE is not set)
or only the first nonzeroRows of the output array ( DFT_INVERSE is set) contain non-zeros,
thus the function can handle the rest of the rows more efficiently and
thus save some time. This technique is very useful for computing array cross-correlation
or convolution using DFT
See Also