[digiKam-users] Raw processing

[frederic chaume]

Hi Gilles


thanks for your advice, I think I found a good set of tools to reach 
what I was looking for:

algorithm AHD with 4 pass
lens correction
local contrast
sharpness improvement
TSL

Then I have put all the parameters I used in the raw import tool as 
default parameters in the DK configuration.
My understanding is that the BQM is using those default parameters to 
import a raw , right ? if not then I didn't find where to configure the 
raw import parameters in the BQM.

I have created a job to automate those steps , so working well (still 
tuning some values) , except the lens correction that have a very 
different result than when run from the editor (using metadata option). 
Any idea?
(for the time being I have removed it for the time being and run 
itmanually on the generated jpeg


frederic



Le 07/03/2021 à 17:21, Gilles Caulier a écrit :
> Le dim. 7 mars 2021 à 16:54, frederic chaume
> <frederic.chaume at gmail.com> a écrit :
>> thanks Gilles for your answer and support
>>
>> (continously learning on DK :-)
>>
>> some question inline
>>
>> Le 07/03/2021 à 16:32, Gilles Caulier a écrit :
>>> Le dim. 7 mars 2021 à 15:05, frederic chaume
>>> <frederic.chaume at gmail.com> a écrit :
>>>> Hi all
>>>>
>>>> I have a camera Olympus OM10 and shooting in Raw+JPEG mode
>>>>
>>>> I'm using DK 7.2 RC and I have the feeling that the JPEG genarated by DK
>>>> from the raw is less sharp  than the one generated by the camera.
>>>>
>>>> is someone has the same feeling ?  is there a particular option in the
>>>> import that could improve ?
>>> Demosaicing is important here. Do not use half methods which generate
>>> a reduced RAW image from decoding.
>> I was using bilinear by defaut but what are the "half methods" you are
>> talking about ? what is the best method for quality ? (I tried AHD, but
>> don't see lots of difference with bilinear )
> The difference will be in-deed around pixels. This depend of camera
> type and algorithm used by libraw engine. I cannot give a generic
> response here.
>
> If you enable noise reduction while demosaicing, this will blur a
> little bit the image.
>
> Look well at all other settings descriptions.
>
> Else, I always apply a small unsharp mask on my photo, and sometimes a
> local contrast to improve coor dynamic automatically. BQM helps a lot
> to batch processes in this way, when right settings are found to
> process a series.
>
>>>> By the way , do we have somewhere a
>>>> description of all the options available in the raw import tool ?
>>> Use SHIFT+F1 over widget or enable tooltips in Plasma settings.
>> shift-F1 is working well , but one time, so need to reactivate each time
>> I'm using it. how to enable tooltips ? (I'm on windows and french version)
> Good Q, as never tried this context.
>
>>
>>> https://imgur.com/7PDVX6o
>> in the snapshot I see a window showing the list of camera, how do you
>> get it ?
> from Help menu, RAW camera info support
>
> Gilles Caulier