Image resizing question

[David_S_13]

I was having difficulty resizing a YV12 image, but I found out (on the forums) that I need to use the following api for each of the planes:

ippiResizeSqrPixel_8u_C1R

It works, but I am curious as to what the following api does:

ippiResizeSqrPixel_8u_P3R

The def. in ippi.h is as follows:

IPPAPI(IppStatus, ippiResizeSqrPixel_8u_P3R, (

const Ipp8u* const pSrc[3],

IppiSize srcSize,

int srcStep,

IppiRect srcROI,

Ipp8u* const pDst[3],

int dstStep,

IppiRect dstROI,

double xFactor,

double yFactor,

double xShift,

double yShift,

int interpolation,

Ipp8u *pBuffer))

I originally tried to use this API but I could not get it to work. I am just looking for clarification as to when one would use this particular API.

Thanks for any info.

[Chao_Y_Intel]

Hi,

ippiResizeSqrPixel_8u_C1R could be a choice for your application. ippiResizeSqrPixel_8u_P3R function resize the images which has 3 separate planes. It requests3 planes data have the same size. ForYV12 data, the U/V data does not have same size with Y. so it can call ippiResizeSqrPixel_8u_C1R function for each image channel.

Thanks,
Chao