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Colour Grading in Blu-Rays (3 replies and 1 comment)

Ismaeel
6 months ago
Ismaeel 6 months ago

Hi Mr Deakins,

I was wondering if when you colour grade a blu-ray do you take into account the average persons TV is un-calibrated and will likely show a cooler version of the image or not.

dmullenasc
6 months ago
dmullenasc 6 months ago

A modern theatrical feature is typically color-corrected for the gamma of digital projection in theaters, what is sometimes called P3 space -- then after the color-correction is done, a "trim pass" will be done for the gamma of home TV monitors, which is Rec.709 gamma. And a standard "white point" which be used for color temperature.

So the colorist will now watch the image on a screen device using Rec.709 gamma and a standard white point to judge how it will look in a home.  However it is impossible to know how it will look in various home viewing conditions with TV sets using a wide variety of image settings; there is no way to color-correct with all of these possible variations in mind, you can only deliver to a known and accepted standard, whether or not people choose to follow it.

Roger Deakins
4 months ago
Roger Deakins 4 months ago

I was looking at a pass of a film at a particular post house in NY and I commented that the whole film looked a little magenta. The timer then brought over another monitor and asked "How about it now?". I suggested it was now green so he had us move over to a third monitor! Unbelievable! And that was a post house who you would think had fully calibrated monitors!

cameronrad
4 months ago
cameronrad 4 months ago

I would hope things start improving in the future. I just saw this news today about a "Filmmaker Mode" being adopted by TV manufacturers to maintain consistency. https://www.forbes.com/sites/johnarcher/2019/08/27/new-james-cameron-approved-filmmaker-mode-coming-to-lg-vizio-and-panasonic-tvs»

I would imagine the next step for higher end TV's would be to include a little pop out colorimeter; like some Eizo displays have, to self calibrate and verify calibration.

NicolasLabra
4 months ago

i was going to comment this exact same thing too, its great that this is finally happening.

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