barrel distortion
(distortion such that a square shows with convex edges)
Barrel distortion is a type of distortion
(i.e., an aberration that changes shapes)
in the image of an optical instrument (such as a telescope),
such that a centered square is distorted such that its straight
edges are (wrongly) convex in the image.
The converse is pincushion distortion.
(telescopes,aberration)
Further reading:
https://en.wikipedia.org/wiki/Distortion_(optics)
https://photographylife.com/what-is-distortion
https://www.edmundoptics.com/knowledge-center/application-notes/imaging/distortion/
https://learnopencv.com/understanding-lens-distortion/
https://www.telescope-optics.net/distortion.htm
Referenced by pages:
aberration
distortion
pincushion distortion
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