topic Re: Question about working with YUY2 colorspace in Intel® Integrated Performance Primitives

Question about working with YUY2 colorspace

diehard21 — Thu, 23 Dec 2004 02:53:04 GMT

Hi guys,

I have images being given to me in YUY2 (YCbCr422?). These are not planar images. I am wondering what the best way to work with these images is. Firstly, I created a new image buffer using ippiMalloc_8u_C2 so I would have correct alignment (YUY2 should be two channels right?). Then I want to copy my original image into the aligned buffer. However, there does not seem to be an appropriate ippiCopy function for two channel data. What copy function should I use?

Secondly, I only want to operate on the Luma component since my images are black and white. For instance, if I want to use a Median filter, how would I only filter the luma component? Thanks for the help.

~Steve

Re: Question about working with YUY2 colorspace

foreststone — Thu, 23 Dec 2004 14:05:00 GMT

I didnt find any functions too.

When using dv encoder , we must do format transform ,maybe we should

write codes with mmx/sseX etc. IPP functions help nothing , isnt it ?

Re: Question about working with YUY2 colorspace

andrewk88 — Fri, 24 Dec 2004 00:57:17 GMT

What I'm doing is:

1) copy a data to 16s buffer

2) delete chroma UV/CbCr byte by logical And with 0x00FF constant using ippiAndC_16u_C1R

3) coverting to 8u or 32f format whatever is needed using e.g. ippiConvert_16s32f_C1R

... works for me :-)

Regards,

Andrew

Re: Question about working with YUY2 colorspace

diehard21 — Fri, 24 Dec 2004 01:38:30 GMT

I would have thought there would be an easier way to work with YUY2 and just the Luma component. This seriously cuts down on the number of calculations :(. Oh well, back to the hand coding.

~Steve

Re: Question about working with YUY2 colorspace

diehard21 — Tue, 28 Dec 2004 22:09:30 GMT

Hello everyone,

Just following up. I figured the easiest way to do it was to define three plane and then split it up using Split422. I can then work on that image buffer and rejoin them when I'm finished. Have a good day.

~Steve

Re: Question about working with YUY2 colorspace

Vladimir_Dudnik — Thu, 30 Dec 2004 07:46:32 GMT

Great!

Thanks everybody for the helping with answering this question. It was real example how IPP community can help.

Regards,

Vladimir