[IPOL announce] new article: The Polar Epipolar Rectification

[announcements about the IPOL journal]

A new article is available in IPOL: http://www.ipol.im/pub/art/2021/328/


François Darmon, and Pascal Monasse,
The Polar Epipolar Rectification,
Image Processing On Line, 11 (2021), pp. 56–75.
https://doi.org/10.5201/ipol.2021.328

Abstract
Epipolar rectification of a stereo pair is the process of resampling a 
pair of stereo images so that the apparent motion of corresponding 
points is horizontal. This is an important preliminary step in depth 
estimation, substituting depth by disparity estimation. Most methods 
rely on a perspective transform of both images, which has the advantage 
to simulate a different attitude of the pinhole cameras. A limitation is 
that when an epipole is inside the image domain, it has to be sent to 
infinity by the perspective transform, producing a strong distortion. On 
the contrary, relying on a polar transform centered at the epipole 
provides a method applicable universally to a pair of pinhole camera 
views. We present in detail the algorithm, filling in the information 
important for its implementation and missing in published articles.