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Re: DCP output color confirming method.

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Nat Jencks
Re: DCP output color confirming method.
on Jul 1, 2014 at 7:06:12 am

Hi Vedat, no this isn't really a good method to "test" this.

Once you've encoded the DCP its in XYZ space and expecting a display gamma of 2.6

When you play back the DCP with easyDCP easyDCP can do the XYZ->RGB conversion, but for it to display correctly it will need to make some assumptions about the gamma of the target display. From what you have described it sounds like easyDCP may well assume a display gamma of 2.2 when you playback on a normal computer display which wouldn't be unreasonable since typical computer displays are sRGB which has a gamma of 2.2

So, short answer, not this is not a good way to test this.

I'd suggest taking the colorists word that it was graded to a rec709 display with gamma 2.4. I'd also have your colorist screen the finished DCP in a proper DCI environment to check it.

good luck
-Nat


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