Fast transforms
These operators are all implemented by fast algorithms.
- opConvolve - One and two dimensional convolution operator
- opCurvelet - Two-dimensional curvelet operator
- opDCT - Discrete cosine transform (DCT)
- opDCT2 - Two-dimensional discrete cosine transform (DCT)
- opDFT - Fast Fourier transform (DFT)
- opDFT2 - Two-dimensional fast Fourier transform (DFT)
- opHaar - Haar wavelet
- opHaar2 - 2-D Haar Wavelet
- opWavelet - Wavelet operator
- opWavelet2 - Wavelet operator
- opWindow - Diagonal window matrix
The curvelet transform requires external software which, because of licensing restrictions, cannot be included with the Spot distribution. Although the Spot interface is included, the package that implements the underlying transform must be installed seperately.