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2D IFFT
Inverse two-dimensional discrete Fourier transform
This feature is for OriginPro only.
1. ifft2 im:=mat(1);
2. ifft2 sc:=1;
3. ifft2 im:= mat(1) om:= mat(2);
| Display Name | Variable Name | I/O and Type | Default Value | Description |
|---|---|---|---|---|
| Input Matrix | im |
Input MatrixObject | |
Specifies the input matrix |
| Undo Shift | sc |
Input int | |
Specifies whether to undo the shifting. This variable should be set to 1 if the DC component is in the center of the input matrix. |
| Output Matrix | om |
Output MatrixObject | |
Specifies the output matrix See the syntax here. |
2D IFFT is a fast algorithm for two-dimensional discrete Fourier transform (2D IDFT), which can be defined as follows:
It works on a two dimensional array of data, and is capable of reconstructing a 2D signal from its spectrum. However, the reconstruction is correct only when the Undo Shift variable is set to the same value as the DC Shift Center variable of the 2D FFT which generated the input matrix. Additionally, for large data, the restored 2D signal might have minor differences from the original signal.
1. To perform 2D IFFT on the active matrix, use the script command:
ifft2
2. To open the dialog of this tool, type in the Command Window:
ifft2 -d
For more information, please refer to our User Guide.