[digiKam-users] Raw processing

[frederic chaume]

Hi Gilles

please forgot my question on RAW parameters , I just found them (was 
looking at the basic tools list)

but my question with the lens correction is still valid

another extra question on BQM, how to add star during the BQM execution ?


Le 08/03/2021 à 10:04, frederic chaume a écrit :
> 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