Fujifilm RAW format: Pallid colours after converting

[Timo Steuerwald]

Hi all,

first of all: Nice application!

Now my question: The Fujifilm RAW files (*.RAF) will be displayed right
in the GUI,
but if I convert the files via the kipi plugin, the resulting image has
not as much saturation as the source file.
Please take a look at the this screenshot:
http://img139.imageshack.us/img139/3830/digikambug2xa8.png
The left one is the thumbnail of the raw file, the right one is the
thumbnail of the converted jpeg file.
I use the default settings of the RAW export dialog, but also if I
modify some of the settings it doesn't change anything.
Currently I use Ubuntu 7.04, DigiKam 0.92 final from Achim Bohnets
repository (http://www.mpe.mpg.de/~ach/kubuntu/feisty).
I have also tried it in Ubuntu 7.10 with the DigiKam 0.9.2 packages of
the distribution itself, but also here appears the same problem.
How can I fix this?


Cheers
Timo

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[Gerhard Kulzer-3]

Am Sunday 11 November 2007 schrieb Timo Steuerwald:

> Hi all,
>
> first of all: Nice application!
>
> Now my question: The Fujifilm RAW files (*.RAF) will be displayed right
> in the GUI,
> but if I convert the files via the kipi plugin, the resulting image has
> not as much saturation as the source file.
> Please take a look at the this screenshot:
> http://img139.imageshack.us/img139/3830/digikambug2xa8.png
> The left one is the thumbnail of the raw file, the right one is the
> thumbnail of the converted jpeg file.
> I use the default settings of the RAW export dialog, but also if I
> modify some of the settings it doesn't change anything.
> Currently I use Ubuntu 7.04, DigiKam 0.92 final from Achim Bohnets
> repository (http://www.mpe.mpg.de/~ach/kubuntu/feisty).
> I have also tried it in Ubuntu 7.10 with the DigiKam 0.9.2 packages of
> the distribution itself, but also here appears the same problem.
> How can I fix this?
>
>
> Cheers
> Timo
>

This is normal!
In a RAW workflow you have to specify a icc profile for conversion. For every
camera sensor one has a number of profiles optimised for different purposes
as landscape photography or portraits. The jpg file (and the embedded RAW
thumbnail) are camera-converted with some average profile. So, you have to
adjust your workflow and profiles to your purpose. RAW shooting is
complex )-:, but when you master it, you'll not let go of it anymore.
Documentation can be read on line : http://www.digikam.org/?q=docs

Hope this helps a bit
Gerhard

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><((((º> ¸.·´¯`·... ><((((º> ¸.·´¯`·...¸ ><((((º>
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[Timo Steuerwald]

Hi Gerhard,

Gerhard Kulzer schrieb:
> Hope this helps a bit
>  
Definitely, many thanks!
Nevertheless, new questions are coming up :-)
1. May be this is a little off-topic: Where can I get ICC profile files
for my camera? Only from the manufacturer?

2. Where can I get the information with which parameters the thumbnail
of the raw file has been generated?
- This looks as I wanted, even if it hasn't been generated using ICC
profiles. Also the raw file itself will be displayed right if I click on
the thumbnail, so here must be conversion in almost the same manner.

Cheers
Timo



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[Enrico-26]

I asked the same, one week ago. I place here both the question and the
answer:


QUESTION


  Hallo Everybody!

  I'm a "digital photographer", and I would like to ask you a question, that
still haven't found answers after my researches. I'm not so expert, but
before asking to you, I checked on the documentation and in Internet, no
results.

  When I download raw (.CR2) photos from my digital SLR, I used to convert
them in this way:

  dcraw -T -w *.CR2

  ...and I got "standard" tiff pictures. Then, I installed Digikam, and I
got similar results using the raw batch converter, leaving the recommended
settings (use camera white balance, automatic color balance), only changing
the savefiles to TIFF.

  But what really shocks me is this: as soon as I download the CR2, Digikam
shows the thumbnail...and the thumbnail of CR2 has better colors than the
thumbnail of the converted TIFF!!!
  My question is: which parameters are used to generate the thumbnail from
the CR2? I suppose that dcraw is used.

ANSWER

The thumbnail are generated to extract the jpeg image embeded in RAW file.
(dcraw -e option)

RAW files are container : raw image data + reduced JPEG image + metadata.

The reduced JPEG image is used to render picture on TV screen very quickly.

Same behaviours when you display the Preview of RAW picture (F3 in Album
GUI). Of course it completly different when you edit image (F4 in Album
GUI). In this case the real RAW image data are used.

Gilles Caulier



----- Original Message -----
From: "Timo Steuerwald" <[hidden email]>
To: "Gerhard Kulzer" <[hidden email]>; "digiKam - Digital Photo
Management for the masses" <[hidden email]>
Sent: Sunday, November 11, 2007 11:09 PM
Subject: Re: [Digikam-users] Fujifilm RAW format: Pallid coloursafter
converting

> Hi Gerhard,
>
> Gerhard Kulzer schrieb:
>> Hope this helps a bit
>>
> Definitely, many thanks!
> Nevertheless, new questions are coming up :-)
> 1. May be this is a little off-topic: Where can I get ICC profile files
> for my camera? Only from the manufacturer?
>
> 2. Where can I get the information with which parameters the thumbnail
> of the raw file has been generated?
> - This looks as I wanted, even if it hasn't been generated using ICC
> profiles. Also the raw file itself will be displayed right if I click on
> the thumbnail, so here must be conversion in almost the same manner.
>
> Cheers
> Timo
>
>
>
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users
>

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[Timo Steuerwald]

Enrico schrieb:
> I asked the same, one week ago. I place here both the question and the
> answer:
>  
Many thanks, Enrico!

Now I understand... :-)
The camera uses AFAIK sRGB colourspace, so I tried to use the sRGB
profile of the FinePixViewer for windows, but Digikam doesn't accept
this. If I set the directory in setup -> colour management, it says
"There exists no ICC-profile data in the directory blablabla...". I use
the german version, so may be the translated error message isn't exactly
the same as in the english version.

Cheers
Timo
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