https://community.intel.com/t5/Intel-Integrated-Performance/FFT-shift/m-p/947487#M18293 <DIV>Hi</DIV> <DIV>Invert sign for every odd pixel. Something like this:</DIV> <DIV> for(int i=0; i<H> {<BR /> Ipp32f *Row = (Ipp32f *)((char *)pSrc + i*srcStep);<BR /> for(int k=0; k<W> {</W></H></DIV> <DIV> if((i+k)&amp;1)<BR /> Row<K> = -Row<K>;<BR /> }<BR /> }</K></K></DIV> <DIV></DIV> <DIV>Igor Klimashevich</DIV> <DIV></DIV> Tue, 07 Feb 2006 20:55:55 GMT iklim 2006-02-07T20:55:55Z https://community.intel.com/t5/Intel-Integrated-Performance/FFT-shift/m-p/947486#M18292 Hi<BR /><BR />Does it exist a function performing a shift of the FFT to have the origin in the center of the image.<BR />Thanks Tue, 07 Feb 2006 02:07:06 GMT https://community.intel.com/t5/Intel-Integrated-Performance/FFT-shift/m-p/947486#M18292 j_bossu 2006-02-07T02:07:06Z https://community.intel.com/t5/Intel-Integrated-Performance/FFT-shift/m-p/947487#M18293 <DIV>Hi</DIV> <DIV>Invert sign for every odd pixel. Something like this:</DIV> <DIV> for(int i=0; i<H> {<BR /> Ipp32f *Row = (Ipp32f *)((char *)pSrc + i*srcStep);<BR /> for(int k=0; k<W> {</W></H></DIV> <DIV> if((i+k)&amp;1)<BR /> Row<K> = -Row<K>;<BR /> }<BR /> }</K></K></DIV> <DIV></DIV> <DIV>Igor Klimashevich</DIV> <DIV></DIV> Tue, 07 Feb 2006 20:55:55 GMT https://community.intel.com/t5/Intel-Integrated-Performance/FFT-shift/m-p/947487#M18293 iklim 2006-02-07T20:55:55Z