Hi! It is an approximation of the luminance of the Y'UV colorspace.
http://en.wikipedia.org/wiki/YUV <http://en.wikipedia.org/wiki/YUV> Regards, Klaus Post http://www.klauspost.com 2010/11/18 David Vincent-Jones <[email protected]> > On Fri, 2010-10-15 at 10:36 +0200, Klaus Post wrote: > > The BW conversion in the exposure mask is pretty simple: > > > > out_rgb = (in_pixel[R]*3 + in_pixel[G]*6 + in_pixel[B]) / 10; > > Klaus; > > The numbers appear to work just fine for me (I interpret this in RS as > R150, G300, B50).. but is there a background logic to this ratio? Is > there reference material to using this ratio? Just interested! > > David > > > _______________________________________________ > Rawstudio-users mailing list > [email protected] > http://rawstudio.org/cgi-bin/mailman/listinfo/rawstudio-users >
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