Wide gamut monitor and photo/video editing.

Started 11 months ago | Discussions thread
OP Mihle Regular Member • Posts: 231
Re: Output for web vs. printing

Simon Garrett wrote:

Mihle wrote:

Simon Garrett wrote:

Mihle wrote:

Chris Noble wrote:

Mihle wrote:

Firstly, it seems like for photos, Adobe RGB is the next step up from sRGB usually. While video it is DCI-P3 (that is smaller).

If I get a monitor that is wide gamut, capable for probably about DCI-P3 but not Adobe RGB. For example Philips 328E1CA or BenQ EW3270U.

Wouldnt photo editing and video editing for YouTube be a problem to have colours look right fort others? Or do YouTube support that?

Could also go for LG 27UK650 or something tho but I don't know....

Btw I am very hobbyist if even that.

Mihle,

You can process and look at and print an image in a color space that is bigger than sRGB.

But when you output it for the web, you should output it to the sRGB color space.

So get a wide-gamut monitor if you want, you can still output and display sRGB files on it.

I hope that answers your question.

In answers it more than others here.

But some questions on that.

If I have a video that is whatever comes out of Fuji camera (sRGB or rec.709 or whatever) and put it in to the video editing program for example Davinchi Resolve, is there something built in that program that knows, or I can tell it, that the monitor is closer ish to DCI-P3 than sRGB (well, let's for this purpose say it was exactly DCI-P3), so that the output looks the same on a just sRGB monitor as it does inside the video editor on the DCI-P3 monitor?

(The output doesn't have to look the same on both, just the output on sRGB one and timeline on DCI-P3 one)

If that make any sense.

Or do I understand it wrong and that is not needed?

The way that software copes with different colour spaces is colour management. Images normally contain embedded colour profiles. A colour profile is simply a description of a colour space. It tells the software how to interpret the RGB values.

Monitors also have their own colour spaces - the range of colours they can display. After calibration/profiling (which can be a factory calibration) a colour profile for the monitor is produced: a description of the monitor's colour space.

Colour managed software uses the image colour profile and the monitor's colour profile to map RGB values from the image colour space to the monitor colour space, and the result is that the correct colours are displayed on the monitor screen.

(I know much less about video encoding, but the principles of colour spaces and colour management are the same.)

So programs can know what a monitor is (for example close to DCI-P3) and the image is supposed to be (sRGB), and "convert" the signals to the monitor so it looks as it and should do it automatically if it works as it should?

Yes. A still image often contains embedded in the file a profile, or there may be a metadata tag to indicate the colour space. If there is none of these, then normally it's safe to assume the image is sRGB. For video, normally the context or encoding of the video allows software to figure out the colour space.

For a monitor, the colour space is defined by the monitor profile, which is set in Windows. Go to control panel -> colour management, and it should show one or more profiles in the list of ICC profiles, one of which should have "(default)" after it. That is the active monitor profile. Colour manged software uses that to determine the monitor colour space. If no default monitor profile has been set, then the software has to guess, and usually guesses sRGB. Few monitors are exactly sRGB, but most standard monitors are very approximately sRGB.

Wide gamut monitors are clearly not sRGB, and if there is no monitor profile then as you said before, the result is likely to be oversaturated colours.

Most photographic software is colour managed. This includes Photoshop, Lightroom, DxO software, ON1, Darktable, GIMP, Affinity...

Most web browsers are colour managed, except Microsoft browsers. Neither Edge nor Internet Explorer are properly colour managed. Also, Microsoft Windows 10 Photos app isn't colour managed (though curiously the older Windows Photo Viewer is colour managed).

In some cases colour management isn't enabled by default I believe, but in general it just works. If the software can figure out the colour space of the image, and if there is a correct monitor profile, then it happens automatically, and colours are shown correctly.

If it doesn't always work, how do so know if a program do work that way?

For the program, check the documentation to make sure it's colour managed and it's turned on if necessary.

For the monitor, the best is to get a colorimeter (i1 Display Pro, Colormunki, Spyder etc) and calibrate/profile the monitor. However, modern monitors are fairly stable and in many cases the manufacturer will provide a profile for the monitor (or possibly more than one for different monitor settings), and you need to make sure the profile is set in Control Panel -> Colour Management. The monitor maker may have software to do that for you.

Thank you for your information and help, that cleared up a lot.

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MOD Austinian
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