Performs an inverse Discrete Fourier transform of 1D or 2D floating-point array.
Namespace: OpenCvSharp.CPlusPlus
Assembly: OpenCvSharp.CPlusPlus (in OpenCvSharp.CPlusPlus.dll) Version: 1.0.0.0 (1.0.0.0)
Syntax
Parameters
- flags (Optional)
- Type: OpenCvSharp.CPlusPlusDftFlag2
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
Return Value
Type: MatThe destination array, which size and type depends on the flags
See Also