making them very
Lens distortion is a common problem that photographers face daily. Distortions can be divided into two groups: perspective distortion (when lines parallel in reality become convergent) and optical distortion (distortion). Distortion often causes unnatural deformation of photographs, straight lines in the image become curved, except for lines in the same plane with the optical axis.
Distortion is different in the type of impact on the line, usually there is a cushion-like distortion (parallel lines in reality are concave) or barrel-shaped distortion (the lines are convex, like in a barrel). Continue reading