Hugin (software)
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Hugin is a cross-platform open source panorama photo stitching and HDR merging program developed by Pablo d'Angelo and others. It is a GUI front-end for Helmut Dersch's Panorama Tools and Andrew Mihal
the same basic images with fisheye projection and different view angle
An example panorama of London using Hugin software
Usual output from Hugin software
Same image after cropping and cloning
Stereographic projection
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In mathematics, a stereographic projection is a perspective projection of the sphere, through a specific point on the sphere, onto a plane perpendicular to the diameter through the point. It is a smoo
Hugin (software)
…of software assistants/wizards output several projection types, such as equirectangular (used by many full spherical viewers), mercator, cylindrical, stereographic, and sinusoidal perform advanced photometric corrections and HDR stitching…
Illustration by Rubens for "Opticorum libri sex philosophis juxta ac mathematicis utiles", by François d'Aguilon. It demonstrates the principle of a general perspective projection, of which the stereographic projection is a special case.
The sphere, with various loxodromes shown in distinct colors
Two points P1 and P2 are drawn on a transparent sheet tacked at the origin of a Wulff net.
The transparent sheet is rotated and the central angle is read along the common meridian to both points P1 and P2.