RE : Using lab
cedric GEMY wrote:
Lab is very interesting for photo retouch because Luminosity (better
said Luminance) is separated from colors.
According to the Wyszecki & Stiles ("Color Science") or to Hunt
("Measuring Colour"), L* is lightness, not luminance, so "better said
Ligntness". :P
It is the most complete color model so that Photoshop uses it when you
want to change the color mode. +> gives more precise result.
But out of that, it is much more difficult to conceive things with
L*a*b. Gimp does not implement it except in the Decompose Filter. May be
another thing to do :)
I think this is in the scope of GEGL. However, I would be disappointed
if CIELAB (L*a*b* coordinates) was in and not CIELUV (L*u*v*
coordinates). The LAB are more used in printing industry and LUV in
display (e.g. TV) industries, and I think Gimp is has always been more
for displayed images than for printed ones...
It is also easier to use.
Regards,
Olivier.
Cedric
