1 // This is core/vil/algo/vil_fft.h 2 #ifndef vil_fft_h_ 3 #define vil_fft_h_ 4 //: 5 // \file 6 // \brief Functions to apply the FFT to an image. 7 // \author Fred Wheeler 8 9 #include <complex> 10 #ifdef _MSC_VER 11 # include <vcl_msvc_warnings.h> 12 #endif 13 #include <vil/vil_image_view.h> 14 15 //: Perform in place forward FFT. 16 // \relatesalso vil_image_view 17 // \relatesalso vil_fft_2d_bwd 18 template<class T> 19 void 20 vil_fft_2d_fwd (vil_image_view<std::complex<T> > & img); 21 22 //: Perform in place backward FFT. 23 // Unlike vnl_fft_2d, scaling is done properly, so using 24 // vil_fft_2d_fwd(), then vil_fft_2d_bwd() gets back the original 25 // image. 26 // \relatesalso vil_image_view 27 // \relatesalso vil_fft_2d_fwd 28 template<class T> 29 void 30 vil_fft_2d_bwd (vil_image_view<std::complex<T> > & img); 31 32 #endif // vil_fft_h_ 33