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Re: rec709 calibrating problems

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Joakim Ziegler
Re: rec709 calibrating problems
on Aug 29, 2013 at 10:48:58 pm

While there may be several problems here, you're getting a few things confused. Rec.709's "overall gamma of 1.9" is in the encoding curve. A problem with rec.709 has been that the spec only includes the encoding curve (what the camera uses to translate linear light into the spec's color space). This curve is not relevant for monitors. You'll want to calibrate your monitor somewhere between Gamma 2.2 and 2.4 to display video correctly. When you say "sRGB Gamma 2.2", I assume you're referring to sRGB primaries and a Gamma 2.2 curve, which is correct, since sRGB and rec.709 primaries are identical (but sRGB has a different curve).

Try calibrating to a pure Gamma 2.2 or 2.4 curve, and see what happens.

--
Joakim Ziegler - Postproduction Supervisor


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