topic DV100 Resizing in Intel® Integrated Performance Primitives

DV100 Resizing

vetroxl — Fri, 16 Apr 2010 19:09:17 GMT

Hi,

Does theippiYCrCb422ToYCbCr422_10HalvesMB16x8_DV100_16s8u_P3C2R resize the width from 1280 to 1920? My final image is always 1280x1080. Is there a fast way to resize just the width? I find theippiResizeYUV422_8u_C2R function slow.

Any suggestions would be great.

Thanks.

DV100 Resizing

PaulF_IntelCorp — Fri, 16 Apr 2010 22:13:52 GMT

try ippiResizeSqrPixel()

http://software.intel.com/sites/products/documentation/hpc/ipp/ippi/ippi_ch12/functn_ResizeSqrPixel.html#functn_ResizeSqrPixel

DV100 Resizing

vetroxl — Sun, 18 Apr 2010 16:35:56 GMT

Ok, thanks Paul. I tried that, it is faster but the cpu jumps to 80%. So then I tried #pragma omp parallel for on the YUV resize and same thing, 80% cpu but twice as fast? I have parallel amplifier but that did not give me any hints why this is happening... Does anyone have any thoughts? Could it be a cache problem? How do I detect cache misses?