Deutsch: Zimmer gerade fotografiert und in die gnomonische Projektion umgerechnet.
${\displaystyle \varphi }$, ${\displaystyle \theta }$ sind Kugelkoordinaten (Objekt) und ${\displaystyle r}$, ${\displaystyle \phi }$ Polarkoordinaten (Bild).

English: Photo of room straightly taken and remapped into gnomonic projection.
${\displaystyle \varphi }$, ${\displaystyle \theta }$ are spherical coordinates (object) and ${\displaystyle r}$, ${\displaystyle \phi }$ polar coordinates (image).

${\displaystyle r=f\tan \theta }$
${\displaystyle \phi =\varphi }$

f = 795.3 pixel