Hallöchen!

Ulrich Pegelow writes:

> [...]
>
> The key problem as of today is an automatic detection that is way
> off and which the user fails to observe.

So if the needed calibration data is in the DB, the user can
successfully use it?  In other words: the current situation is
annoying but not a blocker?

If this is true, LensFun must be changed in my opinion.  I don't
like too much magic in library-using code to evade issues in that
library.  To a certain extent one cannot avoid it; but blacklisting
or Levenshtein are kludges.

> A few ideas:
>
> 1) we could go back to the strict search rules. A lens would only
> be accepted from the database if there is an exact match.

In my opinion, this is the way to go.

LensFun is under-maintained.  But the one thing which is easy to fix
is LensFun's DB.  Through ~/.local/share/lensfun, every user can do
it, too.  So my suggestion is that whenever someone comes with
failed auto-detection, we submit patches for LensFun copying the
<lens> entry under the alias name, marking it as such.  As soon as
somebody implements aliases in LensFun, those entries can be
collapsed to an alias line.

As a side note, I really wonder where those naming problems come
from.  Probably the lens name was derived with an ancient exiftool
version, or by copying the text on the packaging of the lens, or
whatever.  But if almost all LensFun clients use exiv2 today, maybe
the current lens names in LensFun should be simply *replaced* with
their exiv2 equivalents.  It can only improve things.

Just my 2p.

Tschö,
Torsten.

-- 
Torsten Bronger    Jabber ID: [email protected]
                                  or http://bronger-jmp.appspot.com


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