  Most consumer cameras are equipped with electronic rolling shutter, leading
to image distortions when the camera moves during image capture. We explore a
surprisingly simple camera configuration that makes it possible to undo the
rolling shutter distortion: two cameras mounted to have different rolling
shutter directions. Such a setup is easy and cheap to build and it possesses
the geometric constraints needed to correct rolling shutter distortion using
only a sparse set of point correspondences between the two images. We derive
equations that describe the underlying geometry for general and special motions
and present an efficient method for finding their solutions. Our synthetic and
real experiments demonstrate that our approach is able to remove large rolling
shutter distortions of all types without relying on any specific scene
structure.
