[Digikam-users] How to set a correct white balance in RAW import mode?

[Etienne Imguimbert]

Hi Gilles
Are these features planned for a next version of digikam?
(setting white balance in raw mode:  pipette and/or mean of color
values of a region selected by the user)

Thanks !
Etienne



2010/2/4 Gilles Caulier <caulier.gilles at gmail.com>:
> 2010/2/4 Etienne Imguimbert <eimguimbert at gmail.com>:
>> Hello
>> I've enabled backports repository. After updating, digikam-1.0.0 were
>> installed. But this version does not propose nor the pipette tool for
>> setting the white balance when importing raw file, nor a mean measure
>> of the colors on a selected area... ?
>
> This is not yet implemented in gui...
>
> Gilles Caulier
>
>>
>> Thanks
>> Etienne
>>
>>
>> 2010/2/3 Jonas Norlander <jonorland at gmail.com>:
>>> On 3 February 2010 12:13, Etienne Imguimbert <eimguimbert at gmail.com> wrote:
>>>> Hello digikam users !
>>>>
>>>> I'm new to the list, and especially newbie in image processing. So
>>>> please excuse me if my questions seem a bit simple.
>>>>
>>>> I'm actually trying to import correctly the raw pictures produced by
>>>> my new Panasonic G1 camera, and it seems a bit tricky.
>>>>
>>>> I've read on the Internet that it is much better to set the white
>>>> balance before converting the raw to tiff or jpeg. However I can not
>>>> find a reliable method for performing this simple task, that would be
>>>> applicable within digikam. I think particularly on the method exposed
>>>> in the following Gimp/Ufraw tutorial (excuse me, it is in french
>>>> language): http://www.gimpfr.org/document/document_22/
>>>> To summarize this tutorial: the user selects an area of the picture
>>>> that should be white and homogeneous (by example an eye of the model),
>>>> and ufraw calculates the mean values of R, G and B of this area. The
>>>> white balance is well performed when these mean values of the selected
>>>> area get the same value of R, G & B, by playing with the temperature
>>>> and green cursors.
>>>>
>>>> As far as I know, 2 tools are available to white balance the pic into
>>>> digikam: in raw processing mode and in image editing mode. But
>>>> depending on the current mode, the tool sets are not identical ! I
>>>> think particularly to the pipette that does not appear in raw import
>>>> mode and that should help greatly to set the white balance.
>>>> Furthermore I did not find a way to measure the mean values of colors
>>>> of an area selected by the user. Is it possible in digikam?
>>>>
>>>> So my questions are:
>>>> - Is the method explained above a reliable method to get a correct
>>>> white balance?
>>>> - Is it possible to apply this method in digikam, especially in raw import mode?
>>>>
>>>> I use Digikam in Kubuntu Karmic 9.10 (I think it is the 1.0-beta5
>>>> version), amd64 platform
>>>>
>>>
>>> You should enable the backports repository wich contains Digikam 1.0.0.
>>>
>>> / Jonas
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