Ashish Sethi wrote:

I am back with a new doubt (all be it in the same color space spectrum)
MY doubts are regarding YUV color spectrum:-

(I suspect you mean "question" here, not "doubt"; the latter usually implies disagreement. see http://www.perlmonks.org/?node_id=444996 )

1. How r yuv files saved in memory, I mean the format of yuv files and
how can PIL open yuv files.

depends on the file format. PIL doesn't support any file format that supports the YUV color space (the closest you get is YCrCb).

 > 2. How to obtain Y,U,V data of individual pixels and convert YUV 4:4:4
to 4:2:0,    4:1:1, 4:2:2 and vice versa

that's chroma subsampling; see

    http://en.wikipedia.org/wiki/Chroma_subsampling

</F>

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