topic Re: Rotate a YUV video in Intel® Integrated Performance Primitives

Rotate a YUV video

marco_lopes — Fri, 07 Dec 2007 14:44:26 GMT

Hello All,

Im trying to rotate a yuv video 90 degrees but its not working as i expected
Im using ippiRotate 16u C1R, the rotate works but the colors are wrong.
Thank you in advance,

Marco

Re: Rotate a YUV video

Vladimir_Dudnik — Fri, 07 Dec 2007 18:45:06 GMT

Hi Marco,

for the case of rotation by 90 degrees you may prefer to use ippiMirror functions which should be much faster than general ippiRotate.

And note, if your frame is 8-bit per channel you need to use 8u functions not 16u.

Regards,
Vladimir

Re: Rotate a YUV video

marco_lopes — Mon, 10 Dec 2007 19:17:26 GMT

Hello Vladimir,

Thanks for the tips. Mirror functions only help when it's 180 degrees.
Unfortunatelly there is no rotate 8U_C2.

I guess I have to convert it to 24 bit, and then rotate.

Marco

Re: Rotate a YUV video

Vladimir_Dudnik — Tue, 11 Dec 2007 06:00:59 GMT

Oh, yes, you are correct. I mean ippiTranspose function, but this does not work with sub-sampled image formats (like YUV422 or 420).

Regards,
Vladimir