Since the function ippiCrossCorrValid_NormLevel_32f_C1R is marked as deprecated,
we switched to the new function ippiCrossCorrNorm_32f_C1R.
Using this new function, we see a slowdown by a factor 7 between these 2 function calls in IPP8.1
We use a srcRoiSize of 21x21 pixels and a tplRoiSize of 17x17 pixels.
The used algorithm type definition for ippiCrossCorrNorm is:
IppEnum funCfg = (IppEnum)(ippAlgAuto | ippiROIValid | ippiNormCoefficient);
We also noticed that ippiCrossCorrValid_NormLevel_32f_C1R for the given src and tpl sizes is significant faster
than the alternatives ippiCrossCorrValid_Norm_32f_C1R and ippiCrossCorrValid_32f_C1R
which are mathematically simpler image proximity measures.
Any suggestion how to reach the performance of ippiCrossCorrValid_NormLevel_32f_C1R with the new function ippiCrossCorrNorm?