On Feb 13, 2005, at 9:13 AM, Steven M. Schultz wrote:
On Sun, 13 Feb 2005 [EMAIL PROTECTED] wrote:
that a movie media made of several layers does not have the same granularity
(which does obably apply on classic still cameras as well).
The blue layer seems to be made of bigger grains than other, therefore not
having the same resolution.
Having said this, is there a way to reconstruct the Blue from the chroma
planes to apply a different set of processing / denoising ? or am I just
dreaming it... :-)
You can reconstruct _a_ blue from the U and V planes but it won't be the _original_ blue.
You could interpret RGB as 3xY', and process them as independent Y4M 'mono' streams, before re-interpreting them as RGB and convert to Y'CbCr for the encoding stage.
By the time you have a YUV4MPEG2 stream the RGB data has been converted
to "YUV". It's possible to convert YUV to RGB but there is some loss
involved in the process - and of course you'd have to convert back
again from RGB to YUV for encoding.
How about adding RGB support for the Y4M format?
RGB can be split into three logical streams of 'mono'. Any tool that supports mono should be trivial to add RGB support.
Any tool that supports 4:4:4, and treat planes independently should also be trivial to extend.
This would ofcorse be luma-only processing.
A snag: Y is nominally 16-235 but {R,G,B} are full range... Do any of the tools implicitly rely on that?
/Roine
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