🚀 go-pugleaf

In article <8326@charon.cwi.nl> guido@cwi.nl (Guido van Rossum) writes:
>ldo@waikato.ac.nz (Lawrence D'Oliveiro, Waikato University) writes:
>
>>Software wise, I'm less certain what the situation is. I think a great mass
>>of algorithms have been developed that work in RGB space, and a more compact,
>>non-RGB encoding would require more complicated and lengthy computations in
>>many cases, which wouldn't be worth the saving in memory.
>
>I presume one of the advantages of RGB for software is that it's
>additive: if you have two images that you want to mix, and you have
>the pixels as R,G,B color components, mixing becomes trivial (just
>average the components).  Many shading algorithms also use this
>additive property extensively.  I don't think this is as easy for YUV.


As far as I know, you don't even need a math processor to convert YUV <-> RGB:

Y = 0.3 R + 0.59 G + 0.11 B
U = 0.49 (B - Y)
V = 0.88 (R - Y)


>
>--Guido van Rossum, CWI, Amsterdam <guido@cwi.nl>
>"Appelmoes zoals appelmoes bedoeld is!"
>
Ontaarde amsterdammer :-)




Peter Martens