for a circle of radius r is ‘1 rad’ the angle corresponding to length r on the circle,
say
accordingly :
:
for a circle of radius r is ‘1 rad’ the angle corresponding to length r on the circle,
say
accordingly :
:
A normal lens has pincushion distortion or barrel distortion which can be corrected to give a perfect perspective projection, like the image of a pin-hole camera.
This process is called “rectification” and is often applied for stitchich images, for example, in panoramic photography.
The resulting images has no distortion.