P = fftw_plan_dft_r2c_2d(a.cols(), a.rows(), a.data(), (fftw_complex*)FTa.data(), FFTW_ESTIMATE); fftw_execute(P); cout << FTa << endl; cout << endl; P = fftw_plan_dft_c2r_2d(a.cols(), a.rows(), (fftw_complex*)FTa.data(), out.data(), FFTW_ESTIMATE); fftw_...