Colour Management in PL6

Step 3 and 4.
There is always a conversion , otherwise you will see wrong colors. That’s just the idea of color management. A certain color with the pixel values rx,gx,bx in color gamut x is a different color in color gamut y. So the values has to be converted to ry,gy,by to show the equal color.
Conversion is done through the ‘profile connection space’. Every gamut references to that color space.


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It’s a bit tricky when we uses different names and wordings for different or same things and processes.

One often uses the wording conversion when doing a hard change from one space to another for a file.
What soft proofing and any other color space changes does is a transformation of the space matrix, luts or tone curves from one to another.

PL6 (nor PL5 for that matter) doesn’t do correct colormanagement. I use a wide gamut monitor, calibrated and profiled, and I see SUBSTANTIAL difference in color (the reds, what else) between Classic colorspace and Wide Gamut colorspace, EVEN if I’m in softproof-to-sRGB mode.

I shouldn’t see any SUBSTANTIAL differences by switching workspaces. They should translate to the output device’s gamut (using the monitor profile and a connection space) so that the rendering is globally similar. A workspace is invisible (unless it’s ridiculously small, smaller than sRGB). A bigger workspace is useful for smoother gradients, higher latitude for editing. It doesn’t change the output. On my system, it does. As is, I can’t rely on PL6’s previews.

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Yes, it can be irritating. A wide gamut pic is handled differently in PL5 / PL6 CL than in PL6 WG.

In the first case everything is limited to AdobeRGB working color space and further processed from that ‘starting point’. – With PL6 WG there is no such limit, that is, any conversion has to take in account the wider color space … resulting in some colour differencies and also visible in softproof, which indeed mirrors the output. *)

*) tested with DxO Standard

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Well the classic color space is smaller than the wide gamut space. So there’s a larger space and wider range of colors which are to be compressed into a smaller matrix with a perceptual rendering.

If the result would be identical would be worse.

That said - please post some photos to compare the two results - this does not mean that there’s not a bug in the management anyway. :slight_smile:

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I don’t think your assumption is quite correct. If you change the colour processing pipeline then you would expect to see differences in output. The legacy workspace used AdobeRGB and on opening the file there was an automatic conversion of the raw colour space into AdobeRGB. Further editing is then carried out and you output an image into your defined colour space using whatever rendering intent you choose. In WG you are starting from a different place and so would expect a different result.This is why Legacy is still available for backward compatibility.

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This is already a very long thread which I didn’t read in it’s entirety, since I noticed not everone participating uses a fully colormanaged wide gamut workflow, which makes everything very confusing.

I should not see colors that weren’t there in the first place when switching from Classic to Wide Gamut workspace. The Classic workplace was too small, but also had the same issue, and I have filed tickets with support over a year ago, with example files to download and step-by-step instructions how to reproduce the issue. I hoped (and at first believed) that PL6 had adressed this major issue, but unfortunately it’s even more confusing. We now have to empirically shift back colors manually were they belong, especially when using the film simulaltions from DxO.

I have the impression that the notion of “working color space” is wrongly interpreted here on the forum, and that many confuse it with the “outputdevice color space”, presuming that the working color space is something “real” which it isn’t.

You get correct colors in Lightroom or Photoshop anytime, whatever your screen profile is when using the Profoto colorspace. The only issues you get are slight shifts due do the remapping of OOG colors into the output device colorspace according to the intent method employed (relative, perceptual…). IF THE OUTPUT DEVICE SPACE IS SMALLER THAN WHAT THE IMAGE CONTAINS. In no case ever should we get coulours that are more saturated than what they were originally, or hue shifts. This is the case here. Colormanagement is not there to invent colors that weren’t there.

Also lots of confusing between “color space” and “profile”.

The diagram everyone is talking about misses the most important element of a colormanagment system which is the Profile Connection Space (PCS)
I’m not posting images here because I noticed that the forum software has issues with color rendering as well. It’s all a bit ridiculous for a company that has such a great reputation in color science. I can hardly believe it! But I will if asked.

So, you are the only one how knows about, right?

Ah OK, I see this forum is still as friendly as it used to be.

Have a great chat then. Hope you’ll find that bug (there is one, believe me*).

Cheers and have fun taking pictures.


this is not about to be friendly, but polite.

There are still things to be sorted out. But we have to wait for DxO for one of the next updates.

A quote from states:

“A key component of Color Management is a well-defined profile connection space. This standard color space is the interface which provides an unambiguous connection between the input and output profiles.”

From this definition you can deduce that what a lot of people call a PCS is what DxO calls the Working Color Space. The WCS is the connection between input and output devices and is well defined by DxO for use within PL6.

You think I was not polite? Towards whom? I found your reply very unpolite towards me to be honest. I took time to write my posts and do the tests. Your reply:

was totally gratuitious.

So see you next Black Friday, so I can report if PL7 has fixed it! (or not).

You completely misunderstood, I was polite not friendly.

But then after you come up as if only you has the knowledge.
I’m not questioning that you know what you do, how to work etc.

Just calm down. We are here to help each other – that’s all.

From this definition you can deduce that what a lot of people call a PCS is what DxO calls the Working Color Space. The WCS is the connection between input and output devices and is well defined by DxO for use within PL6.

except what DxO did is not just used a wider gamut → if you take a raw file shot of greyscale image (which fits then in sRGB and hence changes in gamut of DxOs so called internal working space shall not result in any changes in output whatsover ) and try to convert it using WideGamut and Classic (with a simple DCP profile to exclude DxO she·nan·i·gans there - DCP profile as we all know does color transform from raw DNs to CIE XYZ/D50 , which is naturally wider that whatever DxO is using internally ) you will receive a very different output … that shall not be the case, but yet it is … so what we have is not a simply change of the color space - we have a different pipeline w/ different tone curve applied and different handing of the same DCP profile, etc, etc… and not documented either by DxO …

Oh dear… :frowning: I’m gone already, don’t worry, I’m fine. Thanks for caring and have a great time taking pictures.

a shot of prozac for everybody on me :laughing: !

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No. It’s a reference, intermediate, color space. See the image in a post of mine in your thread about color management. In stead of a conversion from a to be it’s done from a to pcs and than from pcs to to b. It’s just a method to go from a to b but not being limited to that.


@George Please explain how this would work in PL6 and what benefit it would provide. I see no benefit from adding another color space into the workflow with an additional two conversions to get from RAW file to final output.

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It’s not a matter of an extra color space, it’s a intermediar color space.
From The Manual of Photography

I advise you to by the manual. It has a reputation to hold since 1890. First called The Ilford Manual of Photograpy and since 1971 The Manual of Photography.


So what benefit is there for an additional intermediary color space? I see absolutely NO benefit to that. The working color space is all that is needed.

Please also show me how all other software uses this intermediary color space?