Condition Green!

[Roy Leith]

I'm using V1.4 RC2 which I know is still a work in progress. However, since moving to V1.4 after upgrading to Kubuntu 11.04 and 11.10, I notice that the displayed colours in bit-mapped images in image frames have colours swapped about. Reds are displayed as green no matter what quality of display is chosen.

It is not a problem for me as the final print is fine and so are exported pdfs. I have usually tidied the images in Gimp and so I know the original image quality.

It seems to happen on both of my machines. If it is any help I am using an HP, network connected colour laser printer and a Postscript driver.

I thought I ought to mention it in case there is a more general problem affecting other folk.

Regards
Roy Leith

[utnik]

hello roy

i have never heard about this, but i would recommend to switch to 1.4.0.rc6 and see if the problem persists.

utnik

[Nermander]

I bet it's the "out of gamut" warning you see. The default is to show it as green (probably because colors that most often are out of gamut are NOT greens).

[Roy Leith]

The condition green was, as suggested, an 'out of gamut' warning. I am now trying to find colour management settings for my printer rather than turn it off, all together.

Thanks!

Regards
Roy Leith

[Roy Leith]

I've not had much luck with colour management, so far. I have selected Adobe RGB in the printer driver and in the Scribus monitor colour management setting, but I don't have it listed in the Scribus printer colour management settings.

I have tried several settings, but always get the 'out-of-gamut- warning. Perhaps I need to firtle Gimp to enforce gamut limits during editing.

Does anyone know where to find the .icc template for Adobe RGB for the printer, and where to put it after I've got it!

Regards
Roy Leith

[Nermander]

To get color management working it is NOT sufficient to just get a profile for your printer.

Color management is complicated, and unless you really know what your are doing you are more likely to get better results with color management turned off.


That said, a generic profile for your printer is most likely provided on the driver CD, it might even already be installed on your computer (but not in a location where Scribus finds it). Then you just need to copy it to the Scribus profiles directory.

Note that such a generic profile is not very good, a printer profile depends on the ink used as well as the paper used. Preferably you should have one profile for each paper type you use, and also make a new profile each time you change ink.

[Roy Leith]

To get color management working it is NOT sufficient to just get a profile for your printer.

Color management is complicated, and unless you really know what your are doing you are more likely to get better results with color management turned off.

Note that such a generic profile is not very good, a printer profile depends on the ink used as well as the paper used. Preferably you should have one profile for each paper type you use, and also make a new profile each time you change ink.

I have tried quite a few things in Gimp and Scribus. The printer driver (Linux) has a setting for AdobeRGB and the printer (HP Color Laser CP3505) seems to handle different paper types quite well. However, I cannot turn the gamut warning off and none of the other settings seems to help with that. For Gimp, I cannot turn the gamut warning on and there seems to be no way of finding out within Gimp if the image is out of gamut.

I was prepared to spend time with test prints to see how well colour management could be made to work. I have, reluctantly, decided to turn it off and use the poke and hope colour management process.

Regards
Roy Leith

[Nermander]

GIMP will not show any out of gamut warning since it not aware of the output device gamut.

The gamut is a property of the color profile for the printer. You are saying you don't have that profile, so you must have chosen another profile...

You will not get working color management by "trial and adjustment", to get correct color management you MUST profile your devices.

I too once thought that it was possible to get a "poor mans color management" with a little testing, but the more I read about color management the more I realised it wouldn't work.

[florian_monfort]

Hello everyone,

I am using Scribus 1.4 stable for a newspaper. A professionnal gave me his printer ICC profile.

Then I activate the Color Management button, and some parts of my images and stuff are getting "green". I don't know what this means, but maybe this is what you guys are calling "gammut warning" ?

Since then I was wondering how can I make sure that all images and colors are effectively converted at PDF export with the right profile...

Because actually there are SO MUCH boxes we can tick for color management enabling that I have absolutely no idea how I can verify if it's working and more importantly, once exporting is done, I don't know how to make sure this works. And I can't just ask the professional printer to make tests : it's not free !

So if I could please have your help that would be great !

[Nermander]

There is normally no easy way to test whether color management is working or not, you need to know what you are doing.

Color management works the same in almost every program that can use color management, so search the web for tutorials and explanations. Doesn't matter if they are for InDesign or Scribus, the terminology is the same almost everywhere.