Recursive filters

[Leigh_W_1]

Hi,

IPP has functions ippiFilterRow and ippiFilterColumn for applying seperable 1-dimensional filters to an image.

I had hoped that the in-place versions of these functions would implement a recursive filter, ie: y = k₁y[i-1] + k₂y[i-2] + ... which updates y after computation and uses that as the next value for (what will become) y[i-1].  My initial tests seem to indicate that this is not the case.  Is this expected?  If it is expected, is there functionality available in IPP for recursive 1-dimensional filters (going in both the forwards and backwards directions)?

Thanks

[Chao_Y_Intel · Accepted solution]

Hello, It is true that filter are not the repeat ones. Do you want to filter data on each line and each column? You may try the one dimensional filter function here: http://software.intel.com/sites/products/documentation/doclib/ipp_sa/71/ipp_manual/IPPS/ipps_ch6/ch6_iir_filter_functions.htm Thanks, Chao

[Leigh_W_1]

Thanks that's exactly what I need.