Today I read a paper titled “Geometric Models of Rolling-Shutter Cameras”
The abstract is:
Cameras with rolling shutters are becoming more common as low-power, low-cost CMOS sensors are being used more frequently in cameras.
The rolling shutter means that not all scanlines are exposed over the same time interval.
The effects of a rolling shutter are noticeable when either the camera or objects in the scene are moving and can lead to systematic biases in projection estimation.
We develop a general projection equation for a rolling shutter camera and show how it is affected by different types of camera motion.
In the case of fronto-parallel motion, we show how that camera can be modeled as an X-slit camera.
We also develop approximate projection equations for a non-zero angular velocity about the optical axis and approximate the projection equation for a constant velocity screw motion.
We demonstrate how the rolling shutter effects the projective geometry of the camera and in turn the structure-from-motion.