Warp functions with antialiasing

BMart1 · ‎03-09-2017

I'm using warp functions to get correct chroma siting. RGBToYCbCr422() just averages the chroma of the 4 pixels, when the chroma should be between the leftmost two pixels for mpeg2 and avc. Additionally, the average is always rounded down.

If I also resize the image in the same pass, I get aliasing. The resize functions have antialiasing, but the warp functions don't. Could you add it? Alternatively, since I just need axis aligned transformations, Ipp32f dx, Ipp32f dy arguments could be added to ResizeAntialiasing() that work as in CopySubpix(). Finally, are warp functions as fast as resize when there's no rotation?

Bruno

Valentin_K_Intel · ‎03-13-2017

Hi Bruno,

Feature requests should be submitted via Intel(R) Premier Support. IPP warp functions can be slightly slower than resize for cases without rotation.

Best regards,
Valentin

BMart1 · ‎03-13-2017

Hi Valentin,

Thanks for your answer. I just went and sent my requests via support.

Regards,
Bruno