Introduction - If you have any usage issues, please Google them yourself
Various transformations:// FFT ()- one-dimensional Fast Fourier Transform// IFFT ()- one-dimensional inverse fast Fourier transform// Fourier ()- two-dimensional fast Fourier transform// IFourier ()- D Inverse Fast Fourier Transform// DCT ()- one-dimensional fast discrete cosine transform// IDCT ()- Fast one-dimensional inverse discrete cosine transform// FreqDCT ()- two-dimensional fast discrete cosine transform// IFreqDCT ()- two-dimensional fast inverse discrete cosine transform, discrete wavelet transform two-dimensional image