In other raw editing apps those camera curves are way more simplified.įor example here is how same curve look in darktable app and PhotoLine A top notch monitor, calibrated and profiled with great care, is absolutely required.I guess problems with highlights clipping also may be just because PhotoLine use too many points for curve. Yes, it's tricky, and yes, experience helps a lotīut once I have my file, color management procedure is religion. I do use a color checker in the shot, but mainly for the six neutral patches, which I use to set the contrast curve, white point and black point. But that will be accepted as accurate, because it gives the viewer the same visual experience as seeing the original. What I aim for is equivalent and credible color, not accurate color. It takes so much tweaking that you lose all semblance of internal consistency, it will just look disjointed and fragmented. Even if you can get there, it won't look good, and above all, it won't look right. I gave up on the idea of colorimetric accuracy a long time ago. Suppose I want to photograph a painting and I want to reproduce the original colors of the painting illuminated with a certain light.īy work as photographer at an art museum and I do this all the time. You may want to read this too, since you're nearly always producing output referred images: The role of various illuminants on camera sensors and DNG camera profiles.Įxamples of usage of DNG camera profiles in Lightroom, ACR, and Iridient Developer.
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How to build custom DNG camera profiles using the X-rite Passport software. Just when, and why do you need to build custom DNG camera profiles? Misconceptions about DNG camera profiles. What are DNG camera profiles, how do they differ from ICC camera profiles. How do I create a profile that is faithful to the original lighting? In other words, I want to avoid or at the very least minimize ACR making changes to my colors.Ī custom DCP profile for the illuminant is a good first start:Įverything you thought you wanted to know about DNG/DCP camera profiles:Īll about In this 30 minute video, we will look into the creation and use of DNG (.dcp) camera profiles in three raw converters. Suppose I want to photograph a painting and I want to reproduce the original colors of the painting illuminated with a certain light. I think I understand what you are saying. But it's a subjective decision, not an objective you for your response. That's not to say camera profiles can be anything at all.
If you need to get close to colorimetric accuracy, you need to do that in an output-referred context (an RGB file), not a scene-referred context (camera profiles). If you got an acceptable result in one scenario, it would be off in another. Looking for an objective colorimetric standard here is an exercise in futility. If you could see the raw file directly, it would be a very dark, very flat and tonally compressed monochrome image. There is no reference version of the image - what you see on the camera LCD is just the manufacturer's processing, their choices, no "truer" than anything else. The camera profile is part of that processing. There is no such thing as a "null profile", just as there is no such thing as an "original/untouched" raw file.Ī raw file has to be processed to produce an image at all.
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