}
}
// Transform into frequency space
fft.transform2D( ar[0], ar[1], cols, rows, true );
fft.transform2D( gb[0], gb[1], cols, rows, true );
// Multiply the transformed pixels by the transformed kernel
i = 0;
for ( int y = 0; y < h; y++ ) {
for ( int x = 0; x < w; x++ ) {