Hugin to correct Iphone panorama fisheye distortion

[Tony Denzer]

Hello,

Amateur-level question.

Can Hugin be used to correct (to make 'orthogonal') a single iphone panorama image (such as this) where there is great fisheye/barrel distortion?

What are the lens properties of an already-stitched-by-iphone image? 

I've experimented for hours. I can make small improvements, and can make verticals vertical, but can't figure out how to make the horizontal lines horizontal (or even diminishing-but-straight).

Thanks for any guidance!

[Bruno Postle]

This looks like a cylindrical panorama, ie. Set the projection of the input photo to cylindrical and the output panorama to rectilinear - Bruno

[Tony Denzer]

Yes that was helpful - thank you!