topic Re: YUV 420 downsampling in Intel® Integrated Performance Primitives

YUV 420 downsampling

Alex_B_5 — Thu, 06 Apr 2006 20:02:10 GMT

hello

in case of downsampling an RGB image to YUV 420, with an unpair number of rows and/or columns, what is done with the last sample of each row/column ? is it used to produce chroma samples or is it just lost ?

thanks

aymeric

Re: YUV 420 downsampling

Vladimir_Dudnik — Thu, 06 Apr 2006 22:13:32 GMT

I thinkoddsamples are ignored, could you please specify exactly function name?

Vladimir

Re: YUV 420 downsampling

Alex_B_5 — Thu, 06 Apr 2006 23:17:41 GMT

I use ippiRGBToYUV420_8u_P3R()
and i noticed some odd-sized images could cause memory error when i allocate memory of half original plane size.

for example, i have a plane of size 9 and i allocate a plane of size 4.

thanks

aymeric

Re: YUV 420 downsampling

Vladimir_Dudnik — Fri, 07 Apr 2006 00:21:00 GMT

Agree, in any case function should not destroy memory. Please submit your bug report to Premier Intel Support

Regards,
Vladimir