stereographic lenses are a class of fisheye lenses
sterographic lenses are also called “ conform“or “ winkeltreu“
stereographic lenses use image mapping functions of type
![Rendered by QuickLaTeX.com r = 2 f tan \frac{\theta}{2}](https://www.optowiki.info/wp-content/ql-cache/quicklatex.com-74a2214f92cdba6f7567d00b87417c22_l3.png)
![Rendered by QuickLaTeX.com r = 2 f tan \frac{\theta}{2}](https://www.optowiki.info/wp-content/ql-cache/quicklatex.com-74a2214f92cdba6f7567d00b87417c22_l3.png)
maintains angles
Type : stereographic | weak | medium | strong | max |
---|---|---|---|---|
angles | 94° | 131° | 180° | < 360° |
Example of a Stereographic image :
see Fisheye Types