There is a center parameter in lensfun, it seems to work OK to just create a
version of the lens that I had previously calibrated the distortion parameters
then add a y value.
Hugin lens calibration will also calculate the parameter eg "d", however you
have to give it a starting point that is pretty close. It's not intuitive, but
it seems to be in pixel units.
I think just using the lensfun with a couple of choices will be good enough,
because in practice, I won't know the precise shift values, so would be
guessing anyway.
Conceptually, should the other parameters be the same?
Sincerely yours,
Robin
> On Apr 4, 2018, at 12:11 AM, junkyardspar...@yepmail.net wrote:
>
>
>
>> On Tue, Apr 3, 2018, at 15:38, Robin Kramer wrote:
>> Is there any support for lenses with movements. I'm especially
>> interested in shift. I have a lens with a shift adapter. When I load
>> the straight image, the hugin gui calibrates the lens just fine, but
>> when I load the shifted calibration chart images(all with the same
>> movement), it seems to hang, or at least take a very long time to
>> converge. I'm not sure how to interface this with lensfun, since I
>> suspect another parameter is needed.
>>
>> I use shift often it's a very nice effect, for making trees look
>> straight, or capturing the sky without looking up.
>
> Unfortunately, these types of lenses don't play nicely with lens corrections.
> There's some discussion of this here:
>
> https://github.com/lensfun/lensfun/issues/299
>
> --
> jys
>
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