authors 
Devernay, F. and Faugeras, O. 
year 
1995 
title 
Automatic Calibration and Removal of Distortion from scenes of structured environments 
source 
Proceedings of the SPIE Conference on Investigate and Trial Image Processing, 2567, SPIE, San Diego, CA, July 1995 
summary 
Most algorithms in 3D Computer Vision rely on the pinhole camera model because of its simplicity, whereas video optics, especially lowcost wideangle lens, generate a lot of nonlinear distortion which can be critical. To ønd the distortion parameters of a camera, we use the following fundamental property: a camera follows the pinhole model if and only if the projection of every line in space onto the camera is a line. Consequently, if we ønd the transformation on the video image so that every line in space is viewed in the transformed image as a line, then we know how to remove the distortion from the image. The algorithm consists of ørst doing edge extraction on a possibly distorted video sequence, then doing polygonal approximation with a large tolerance on these edges to extract possible lines from the sequence, and then ønding the parameters of our distortion model that best transform these edges to segments. Results are presented on real video images, compared with distortion c... 
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last changed 
2003/04/23 13:14 
