Recent posts
https://software.intel.com/en-us/recent/806849
enefficient multiplale fft's
https://software.intel.com/en-us/forums/topic/379358
<p>Hello,</p>
<p> I wan tto use fft to filter a large 2d image (~1000x1000). I want to filter the image several times each time with a different kernel (~21x21).</p>
<p>To benefit from the using the fft i can calculate the image fft once then only calculate each kernel's fft multiply the two and invFFT..</p>
<p>the problem is that the image is much larger than the kernel and zero padding the kernel to the image size looks to be very wasteful, is there a fft implementation that takes advantge of the zeros and computes the larger fft but withou the external zero padding?</p>
</p>
<p>Thnak you in advance,</p>
<p> Noam.</p>
Mon, 18 Mar 13 07:31:16 -0700Noam Z.379358