Adjusting color gamut

[Anonymous]

After two weeks, and even with this beautiful “bible” some elements are missing. I remember we can adjust the color gamut and obviuosly you have to redo your grayscale and white point adjusment as you are moving the space in which controls are operating. Make sense.

1) english wording: what does CCA means?
2) Secondaries: if we move the space to a better position (ie adjusting the 3 primaries corners) and then the gray scale and white points, are we done?
Normaly the secondaries are defined via a line going from the opposite primary thru the D65 point;
Am i wrong or is there a way to adjust them separately? does it make sense?

Topic

[Gregg Loewen]

1. CCA = custom color adjustment (or something like that ).

2. no…secondaries also need to be set. the tool on the http://www.accupel.com site will caliculate the secondary points for you. We also gave you the target points in class (in the slide presentation).

Please note that if the lumenance values (large Y) are not accurate you can have inaccurate colors despite their xy locations being correct. (remember the Epson demo).

[Anonymous]

THANKS! now i remember and i will know. Who said an exam was not usefull! Let’s go further: Y can be considered as the 3 rd axis missing in a 3D space: is this correct?

[Gregg Loewen]

yes….the Z axis

[Anonymous]

Hmmm CCA … color correction algorithm? 🙂 or correlated color algorithm

[Gregg Loewen]

crazy canadian (from) alberta ??

[Author]

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