Originally posted by biz-engineer ... I found that every application that displays an image or a video does it through the monitor profile interface of the OS, regardless whether a color management option is selected or not.
Perhaps you are running MacOS. It uses colour-management at the system level.
For Windows, your statement does not apply.
If a Windows application does not perform colour-management, the image will be rendered incorrectly.
How bad the effects are depends on the colour space differences and the default monitor behaviour.
Originally posted by biz-engineer Color management options have nothing to do with monitor profile
Of course they do.
This is very easy to see on a Windows system.
Originally posted by biz-engineer color management interpolate image color space to match monitor color space if color spaces aren't the same,
While the presence of a monitor profile supports colour space transformations, such as from AdobeRGB to sRGB, the profile is also used to compensate for any deviations the monitor has, e.g., from an sRGB response when it is running in sRGB mode.
Originally posted by biz-engineer For example, enabling color management has no effect on the display of an sRGB JPEG image to an sRGB monitor, regardless of monitor calibration.
Again, it is very easy to see that effect in Windows.
With a monitor that perfectly emulates or implements a colour space, such as sRGB, you indeed wouldn't see a difference between using a colour-managed application or a non-colour managed application (with images in the sRGB space). However, the majority of monitors produce some deviations that are then compensated by the monitor profile.
Note that monitor calibration and monitor profiling are two different things.
Monitor calibration indeed configures the graphics card such that the tonal range is correctly displayed on the monitor with the correct gamma curve. Some linear colour errors can be addressed by monitor calibration as well.
Monitor profiling produces a profile that is used for compensating for any colour errors that remain after the calibration.
Originally posted by biz-engineer IMHO, ProPhoto is for when professionals want to take advantage of printer having a color gammut larger than Adobe RGB,
ProPhoto is often used as an editing space, e.g., by Lightroom. Photoshop also supports it.
Some printers can print some colours outside the AdobeRGB colour space (which is smaller than the ProPhoto colour space) but not many.
Originally posted by biz-engineer it is not possible to soft proof it if your monitor color space is no larger than sRGB or not larger than Adobe RGB.
Obviously it is not possible to see colours on the monitor that the monitor cannot produce.
However, one can still use soft-proofing as a perceptual mapping of colours into the monitor space will allow one to validate those in-gamut colours. For out of gamut colours, some applications provide modes that highlight areas with out of gamut colours. If a monitor covers the AdobeRGB space pretty well (need not be 100%) then out-of-gamut colours will be pretty rare.