Hallöchen!

Moritz Moeller writes:

> I recently started using very shot fisheye lenses (12-14mm) for
> event photography. The idea is that you will never catch the right
> angle/composition/moment all together at a wedding/party etc.
>
> Afterwards, you undistort the images and crop to the region with
> the best composition, to obtain a FOV more like 35mm or 50mm.
>
> The problem is that you also want to shift the image around in the
> distorted space before undistorting & cropping. Not after.

Funny enough, this is mathematically equivalent to perspective
correction.  Current Lensfun calculates these angles for you based
on control points (of vertical/horizontal lines), but Roman already
requested a function which gets the angles themselves as parameters.
Then, these angles could be exposed in the UI.

Tschö,
Torsten.

-- 
Torsten Bronger

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