ippiYCbCr411ToYCbCr420_8u_P3R vs cc_YUV411_to_YUV420

[anonymous210]

Hi,


The file umc_color_space_conversion.cpp contains the following code:

----------------
switch (srcFormat) {
case YUV411:
switch (dstFormat) {
case YUV420:
//status = ippiYCbCr411ToYCbCr420_8u_P3R(pSrc, pSrcStep, pDst, pDstStep, srcSize);
status = cc_YUV411_to_YUV420(pSrc, pSrcStep, pDst, pDstStep, srcSize);
break;

-----------------

Why the ippiYCbCr411ToYCbCr420_8u_P3R is commented out?
Is there any difference between ippiYCbCr411ToYCbCr420_8u_P3R and cc_YUV411_to_YUV420?
I don't see any difference between these functions and just wondering why UMC is not using the optimized ippiYCbCr411ToYCbCr420_8u_P3R?


Thanks

[Chao_Y_Intel]

Hello,

I just checked the code , ippiYCbCr411ToYCbCr420_8u_P3R should be the right optimized function for such color conversion. I submitted a request into engineer database, and the owner will clear up the code to avoid any confusion.

Regards,
Chao

[Vladimir_Dudnik]

Hello,

IPP function was designedto not use filtering during transform which cause to visually worse results. It is acceptable in some cases and was done intenionally for performance reasons.Socounterpart functionality was developed in UMC level.

Regards,
Vladimir