Digital Light & Color

Marv, PS is taking its monitor profile from some Windows setting, but in PWP you have to explicitely set it in the Color Management dialog.
Maybe you have something different in Monitor Rendering Intent too (Maintain Full Gamut is recomendet for almost all purposes).

Dieter,

I checked the Monitor Profile in my colour settings. I had, naively, assumed that the monitor profile obtained from calibrating the monitor with Spectraview etc should be chosen from the drop down menu, but after reading the explanation in PWP Help, it appears not. To quote "The monitor profile setting does not incorporate monitor calibration, it simply tells the colour management system what standard your monitor is calibrated to (if any)." I tried entering Adobe RGB (1998) while an image was on screen and things immediately appeared a bit darker. When I looked at the mask, the ghosting I had not viewed before in PWP was now quite visible. I now presume the monitor profile is what is elsewhere referred to as the working space (and the profile attached to an image when processing out of its raw state)???

Marv

The monitor profile should be set to the profile generated by your calibration hardware. The calibration itself takes the form of lookup tables for R,G and B that image data is passed through to make the monitor conform to standard brightness curves. The profile contains the monitor primaries as determined by the calibration and the white point, black point and gamma to which you calibrated.

The working color space is something else entirely - a common, device-independent color space that images are normally converted to when they are opened and in which all image transformations are done.

Another important point...

In PWP, the monitor profile is entered in the File/Color Management dialog box. In PS, you set the monitor profile using the Windows Display control panel. For either program, if you have a calibrator you also need to have its color lookup table loader in your startup folder and you need to remove Adobe Gamma from your startup folder.

Perfect. I think I got it now.

Thanks again to Dieter and Jonathan for helping me along this confusing road.

Marv