What's the difference between the ippiResizeSqrPixel and ippiResizeFilter routines andwhy do they produce different results?
could you please provide more details on that? It would be nice to have your original image and parameters you use for IPP functions to investigate what might be the problem.
Add one notes from the function experts,
The two functions have slightly different realization of Lanczos method.
In the function ippiResizeSqrPixel it is more academic approach but in the function ippiResizeFilter filtering more depends on the sample values.
So if we do down-sampling with good values (multiplies of image sizes) using ippiResizeFilter, we can get more qualitative picture.
But ippiResizeSqrPixel has more performance and requires less memory under equal status.