Hi all,
I'm trying to build a profile with a Rec. 709 transfer curve. I
thought I could do something like this:
cmsFloat64Number params[7];
params[0] = 0.45; /* y */
params[1] = 1.099; /* a */
params[2] = 0.0; /* b */
params[3] = 4.5; /* c */
params[4] = 0.018; /* d */
params[5] = -0.099; /* e */
params[6] = 0.0; /* f */
return cmsBuildParametricToneCurve (NULL, 5, params);
i.e. from the table here:
https://en.wikipedia.org/wiki/Rec._709#Transfer_characteristics
...but that gives me very much the wrong looking curves. Thanks for any help.
Richard.
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