
Figure 23.8 Gamma in
Mac and PC
are different, owing to the interpretation of
RGB
code values by
th~ rlicnl ....
y~t~m On ~ at- § utp,,§ II IT
"
~hc,-,
~u, Is e~the - nt or rogram~A ~,~k~,~, ~,~'~,~ ~...~
uL
L.I |~.. I.A | ~...,
,Jv,~z ........... o ........ p ..... as if
values are subject to the 2.5-power function of the display (sketched in the lower curve). On a Mac,
the default output LUT imposes a 1/1.45-power function on the code values, then the display imposes
its usual 2.5-power function the concatenation of these two functions results in a 1.72-power func-
tion that relates Mac code value