[digiKam-users] Raw processing

[fch22]

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 ? By the way , do we have somewhere a
description of all the options available in the raw import tool ?

thanks in advance

frederic

[Gilles Caulier-4]

Le dim. 7 mars 2021 à 15:05, frederic chaume
<[hidden email]> 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.


>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.

https://imgur.com/7PDVX6o

Gilles Caulier

[fch22]

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
> <[hidden email]> 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 )
>> 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)


>
> https://imgur.com/7PDVX6o
in the snapshot I see a window showing the list of camera, how do you
get it ?
>
> Gilles Caulier

[Gilles Caulier-4]

Le dim. 7 mars 2021 à 16:54, frederic chaume
<[hidden email]> 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
> > <[hidden email]> 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

[fch22]

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
> <[hidden email]> 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
>>> <[hidden email]> 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

[fch22]

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
>> <[hidden email]> 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
>>>> <[hidden email]> 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