sRGB Vs. Adobe RGB

Hello,

I've just played a little bit with my camera and compare the picture quality
within digikam with the colorspace set to sRGB and Adobe RGB.
I can see a huge difference in color representation between these two.
Digikam shows me for the Adobe RGB picture as Exif information:
Color Space: Uncalibrated
Am I right that digikam doesn't support Adobe RGB?
Should I stop taking pictures with Adobe RGB if I want to process them
with digikam?
Should I try to get some icc files for my cam and use it with 0.9 svn?


thanks & so long,

Marcus.

--
Marcus Popp       fon:    [phone]
Wilhelm-Kuhnert-Str. 20
D-81543 Muenchen  e-mail: [hidden email]
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Gilles Caulier-2]

Le Jeudi 06 Avril 2006 07:35 PM, Marcus Popp a écrit :
> Hello,
>
> I've just played a little bit with my camera and compare the picture
> quality within digikam with the colorspace set to sRGB and Adobe RGB.
> I can see a huge difference in color representation between these two.
> Digikam shows me for the Adobe RGB picture as Exif information:
> Color Space: Uncalibrated
> Am I right that digikam doesn't support Adobe RGB?

not digikam directly, but little CMS library.

> Should I stop taking pictures with Adobe RGB if I want to process them
> with digikam?

Are you a possible profile selection in your camera settings ?

> Should I try to get some icc files for my cam and use it with 0.9 svn?

Here we can find a digiKam ICC camera profiles repository. All contributions
welcome. These files cannot be available with digikam directly for any
license reasons :

http://digikam3rdparty.free.fr/ICCPROFILES/

For more informations, i lets Paco explain beter than me all ICC profile
rules..

Gilles
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

Hello,

I also have a camera that supports both sRGB and Adobe RGB. However, from most
of the sources (forums, user manual etc) I get the information to stick to the
sRGB color space. I am still not really convinced about this issue. I know that
the AdobeRBG can represent higher number of colors (the gamut is bigger).
However in a typical case (that is working with digikam for own printouts on
non-calibrated, non-professional screen) I don't see the benefit. And also if I
take pictures with AdobeRGB the output on the screen will be much more "flat" in
colors.
The second thing: I am not sure that the photo-labs are using the AdobeRGB.

Could you explain me why it is good to use it? This color-space stuff is a bit
unclear for me.

Thanks!
Regards,
Gabor Dudas




Marcus Popp wrote:

> Hello,
>
> I've just played a little bit with my camera and compare the picture quality
> within digikam with the colorspace set to sRGB and Adobe RGB.
> I can see a huge difference in color representation between these two.
> Digikam shows me for the Adobe RGB picture as Exif information:
> Color Space: Uncalibrated
> Am I right that digikam doesn't support Adobe RGB?
> Should I stop taking pictures with Adobe RGB if I want to process them
> with digikam?
> Should I try to get some icc files for my cam and use it with 0.9 svn?
>
>
> thanks & so long,
>
> Marcus.
>

_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

On 2006-04-06T20:47, Dudas Gabor wrote:

> Hello,
>
> I also have a camera that supports both sRGB and Adobe RGB. However, from most
> of the sources (forums, user manual etc) I get the information to stick to the
> sRGB color space. I am still not really convinced about this issue. I know that
> the AdobeRBG can represent higher number of colors (the gamut is bigger).
> However in a typical case (that is working with digikam for own printouts on
> non-calibrated, non-professional screen) I don't see the benefit. And also if I
> take pictures with AdobeRGB the output on the screen will be much more "flat" in
> colors.
> The second thing: I am not sure that the photo-labs are using the AdobeRGB.
>
> Could you explain me why it is good to use it? This color-space stuff is a bit
> unclear for me.

I've read that it provides better colors, but I cant tell for sure.
My experiments end at importing two images (one with and one without Adobe RGB)
to digikam.

so long,

Marcus.

_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

Marcus Popp wrote:

> On 2006-04-06T20:47, Dudas Gabor wrote:
>> Hello,
>>
>> I also have a camera that supports both sRGB and Adobe RGB. However, from most
>> of the sources (forums, user manual etc) I get the information to stick to the
>> sRGB color space. I am still not really convinced about this issue. I know that
>> the AdobeRBG can represent higher number of colors (the gamut is bigger).
>> However in a typical case (that is working with digikam for own printouts on
>> non-calibrated, non-professional screen) I don't see the benefit. And also if I
>> take pictures with AdobeRGB the output on the screen will be much more "flat" in
>> colors.
>> The second thing: I am not sure that the photo-labs are using the AdobeRGB.
>>
>> Could you explain me why it is good to use it? This color-space stuff is a bit
>> unclear for me.

> I've read that it provides better colors, but I cant tell for sure.
> My experiments end at importing two images (one with and one without Adobe RGB)
> to digikam.
>
> so long,
>
> Marcus.

I quote from my Canon 350D user manual:

AdobeRGB:
"This is mainly used for commercial printing and other industrial uses. This
setting is not recommended if you do not know about image processing, AdobeRGB,
and Design rule for the Camera File System 2.0 (Exif 2.21).
Since the image will look very subdued in an sRGB personal computer environment
and with printers not compatible with Design rule for Camera File System 2.0
(Exif 2.21), post-processing of the image with software will be required"

Regards,
Gabor
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

Dudas Gabor wrote:

> I quote from my Canon 350D user manual:
>
> AdobeRGB:
> "This is mainly used for commercial printing and other industrial uses. This
> setting is not recommended if you do not know about image processing, AdobeRGB,
> and Design rule for the Camera File System 2.0 (Exif 2.21).
> Since the image will look very subdued in an sRGB personal computer environment
> and with printers not compatible with Design rule for Camera File System 2.0
> (Exif 2.21), post-processing of the image with software will be required"

AFAIK, the screens (hardware) are sRGB and can't display
adobe. If you don't know what is sRGB and what is adobe, use
sRGB...


jdd

--
http://www.dodin.net
http://dodin.org/galerie_photo_web/expo/index.html
http://lucien.dodin.net
http://fr.susewiki.org/index.php?title=Gérer_ses_photos
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

On 2006-04-06T21:10, jdd wrote:

> Dudas Gabor wrote:
>
> > I quote from my Canon 350D user manual:
> >
> > AdobeRGB:
> > "This is mainly used for commercial printing and other industrial uses. This
> > setting is not recommended if you do not know about image processing, AdobeRGB,
> > and Design rule for the Camera File System 2.0 (Exif 2.21).
> > Since the image will look very subdued in an sRGB personal computer environment
> > and with printers not compatible with Design rule for Camera File System 2.0
> > (Exif 2.21), post-processing of the image with software will be required"
>
> AFAIK, the screens (hardware) are sRGB and can't display
> adobe. If you don't know what is sRGB and what is adobe, use
> sRGB...

I know the difference between the two. But I don't know if it
makes a difference ;-) This is what I'm trying to find out.

so long,

Marcus.
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

jdd wrote:

> Dudas Gabor wrote:
>
>> I quote from my Canon 350D user manual:
>>
>> AdobeRGB:
>> "This is mainly used for commercial printing and other industrial uses. This
>> setting is not recommended if you do not know about image processing, AdobeRGB,
>> and Design rule for the Camera File System 2.0 (Exif 2.21).
>> Since the image will look very subdued in an sRGB personal computer environment
>> and with printers not compatible with Design rule for Camera File System 2.0
>> (Exif 2.21), post-processing of the image with software will be required"
>
> AFAIK, the screens (hardware) are sRGB and can't display
> adobe. If you don't know what is sRGB and what is adobe, use
> sRGB...
>
>
> jdd
>

I agree.
But -as I've just read now- there are two exceptions:
1st:
- You want to print your pictures out at home with a good printer that supports
AdobeRGB and it is calibrated! However...I still don't know how to adjust the
picture on screen that is sRGB! Maybe you change something, and you try to print
it out..and if you don't like it, you adjust again, and print again :)
2nd:
- You have an Eizo CG220 Graphic Screen, that produces that AdobeRGB...which is
around 4000 Euro (4900$) in Hungary :D

Regards,
Gabor
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users