Re: [DCP-o-matic] XYZ image sequence colour problems

Also - I think this is important to stress - we always communicate XYZ, Gamma 2.6 for DCI - however, these are the projection parameters. The DCI projector uses a display-gamma of 2.6. This clearly means - we must not apply a Gamma of 2.6 towards our source footage, but actually an INVERSE 2.6 gamma, so that the DCI projector displays it correctly using it’s calibrated gamma of 2.6. DCP-o-matic has this explicitly right, quoting in it’s color conversion dialog: ‚inverse 2.6 gamma correction on output‘ as the final stage. That also means, DCI corrected TIFFs or J2Ks will usually appear flatter (‚softer‘) compared against their source footage when viewed without correction. Which is the case when you look at DCPs uncorrected. - Carsten