topic function for shift image after FFT in Intel® Integrated Performance Primitives

function for shift image after FFT

mweissbach — Fri, 04 Feb 2011 06:34:34 GMT

Hi

I have 2 images which are lineartransformed by the FFT -> Pack and multiplied - to perform a convolution in F-space.
Now I'm looking for a function for shift the result in such a way, the highest frequencies are in the middle of the image

My question:So far as I recall,former versions of the IPP offereda function, that shifts the image. Is there such one provided by the current IPP?

Thanks a lot

M.W.

edit: This matter canbe done withthe remap function, which solves the general case of remapping. Is there a more specialized and therefore a more accelerated function available in the current IPP?

function for shift image after FFT

Thomas_Jensen1 — Fri, 04 Feb 2011 12:09:24 GMT

I also had this problem and choose to write my own since IPP didn't have one.
I just used ippCopy 4x to copy 1 quadrant at a time. Does require double buffers though.

function for shift image after FFT

Gennady_F_Intel — Fri, 04 Feb 2011 16:36:17 GMT

yes, Iconfirm that such functionalityis missing in the current version of IPP. If you reallyinterestingin suchfunctionality, You cansubmitthe Feature Request against IPP.

--Gennady