lens auto correction (vignetting)

[samkv]

Hi.
I'm trying to correct vignetting of my lens, but it's grayed out, and i cant enable it.
I've added lens vignetting data to lensfun database and it's work in darktable.

what I do:
1) select raw photo
2) press F4
3) selecting import options
4)enhance->lens->auto-correction
use metadata is selected, and correct lens and shoot parameters is correctly detected.
only subject distance is zero.
Any way all corrections except vignetting are enabled.
When I switch to manual mode, set all the parameters including subject distance, vignetting is active, but correction is rather strange...

you can see this "lines" they come after "correction" of vignetting.


can somebody help with this?
Thanks.

[Maik Qualmann]

Hi,

the graphic interference are now be fixed in digiKam 4.11.0. The grayed out
checkbox I can not repruduzieren when data for the correction of vignetting
exist. Can you share a image and the changes to the lensfun database?

Maik

Am Sonntag, 31. Mai 2015, 11:41:07 schrieb samkv:

> Hi.
> I'm trying to correct vignetting of my lens, but it's grayed out, and i cant
> enable it.
> I've added lens vignetting data to lensfun database and it's work in
> darktable.
>
> what I do:
> 1) select raw photo
> 2) press F4
> 3) selecting import options
> 4)enhance->lens->auto-correction
> use metadata is selected, and correct lens and shoot parameters is correctly
> detected.
> only subject distance is zero.
> Any way all corrections except vignetting are enabled.
> When I switch to manual mode, set all the parameters including subject
> distance, vignetting is active, but correction is rather strange...
> <http://digikam.1695700.n4.nabble.com/file/n4677942/IMG_2302.jpg>
> you can see this "lines" they come after "correction" of vignetting.
>
>
> can somebody help with this?
> Thanks.
>
>
>
>
> --
> View this message in context:
> http://digikam.1695700.n4.nabble.com/lens-auto-correction-vignetting-tp4677
> 942.html Sent from the digikam-users mailing list archive at Nabble.com.
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[Maik Qualmann]

Thanks for the lensfun.xml and the image. Right, the object distance is zero
in the EXIF from the image. The object distance is for the vignetting
correcting a required value, since it is null, the selection box is grayed
out. In digiKam 4.11.0 the manual settings are now stored (aperture, focus,
object distance if valid, from the current image). A value for the object
distance can now be set, which is saved.

Maik
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[Torsten Bronger]

Hallöchen!

Maik Qualmann writes:

> Thanks for the lensfun.xml and the image. Right, the object
> distance is zero in the EXIF from the image. The object distance
> is for the vignetting correcting a required value, since it is
> null, the selection box is grayed out. In digiKam 4.11.0 the
> manual settings are now stored (aperture, focus, object distance
> if valid, from the current image). A value for the object distance
> can now be set, which is saved.

FWIW, the Lensfun docs suggest a value of 1000 for the distance if
it is not known.

Tschö,
Torsten.

--
Torsten Bronger    Jabber ID: [hidden email]

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[Maik Qualmann]

Torsten Bronger writes:

> FWIW, the Lensfun docs suggest a value of 1000 for the distance if
> it is not known.

Thanks Torsten, set the value for object distance to 1000, when no valid value
is present, we can do so.

Maik

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