ICC Profiles

[drisley]

I usually assign the sRGB color profiles to my G3 Tiffs when I convert from Raw with Breezebrowser.

Would it be best to set Photoshop to use Adobe RGB, and when I bring the photo into PS for touchups, convert to that profile?

Then, when I save, keep Adobe RGB for prints, and convert back to sRGB for web?

Up until now, I've done everything in sRGB, but from what i've been reading, Adobe RGB offers a wider colour range for print.

Any recommendations would be appreciated.

[PacAce]

drisley wrote:
I usually assign the sRGB color profiles to my G3 Tiffs when I convert from Raw with Breezebrowser.

Would it be best to set Photoshop to use Adobe RGB, and when I bring the photo into PS for touchups, convert to that profile?

Then, when I save, keep Adobe RGB for prints, and convert back to sRGB for web?

Up until now, I've done everything in sRGB, but from what i've been reading, Adobe RGB offers a wider colour range for print.

Any recommendations would be appreciated.

Since the G3 is not capable of assigning the Adobe RGB color space during shooting like the 10D can, I don't see the merit of converting it to Adobe RGB when you import the image into PS. You're not going to gain any more color info than you already started out with but you will go through the extra step to convert it back to sRGB when you go to the web. Why not just keep it at sRGB for prints and web?

[drisley]

Thanks, that makes sense.

[marcel wouters]

Drisley,
If you shoot raw there is no profile applied to ccd data (just raw data)!
If you profile your camera (the G3) with an IT8 target you will discover that the gamut of the G3 is greater than the sRGB or the adobe RGB space.
I work in a wide gamut linear space, if i convert my shooted target to sRGB 23 patchs are clipped and i think 17 for adobe RGB (this is the demonstration that pro photo paper gamut is over the sRGB gamut) , conclusion it should be better to work and archive your pics in a wider space, and convert at the very last time to the output needed space. This is a very theorical view as many time you can't see any difference as your screen gamut is limited but for exemple Kodak photo CD use a bigger gamut space just to be shure that pics data contains enough informations when they (maybe) will be viewable in the future!

For the web your pic must be converted to sRGB or another apropriate space for screen display.

For printing outside adobe RGB is not a good choice as about all consumer on line printing system are based on sRGB, this give an undersaturated colors as the space is not converted.

Now if you print on your printer using his own profile it's best to stay in your wider space and let your imaging software doing the proper output conversion

[darrylr]

I have been shooting everything in RAW on my G3 and usually save them to TIFFs in either Adobe RGB or Pro Photo RGB. I do find for sure that sRGB does not cover all the colors present in the RAW image. Adobe RGB seems to get most of them but sometimes not all.

Since I archive the RAW files I can always use a different space later if someday printers can print a wider space or for whatever reason.

-Darryl

[marcel wouters]

Hi Darryl,
Kodak pro photo is of course a good wide gamut space!
I redo a check with my last profile and i get 10 out of gamut patchs in adobe RGB and 33 with sRGB (0 of course with K pro photo).
Of course the target used for profiling is not printed by a consumer lab but use the full photo paper range capability!