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Abstract: A
method for distortion correction of un-calibrated lens with unkown
collinear feature points is proposed and the improved fast distortion
correction calculating method based on pre-computing template is
implemented. Without known camera parameters and any known world
coordinates point in 3D space, the distortion parameters of camera lens
can be estimated based on the perspective projection invariant of
straight lines. The proposed distortion correction method is easy to be
performed and characterized by simple algorithm, fewer known conditions
and fast computing speed. Some experiments to evaluate the performance
of this approach on real images are reported, and the results show that
this method is feasible for the machine vision systems. The improved
method with pre-computing template drastically reduces the computation
charge. And real-time applications of the image distortion correction
are improved.
Key words: Perspective
projection Distortion correction Collinear point Invariant
CLC No: TP391.41
教育部新世纪优秀人才支持计划资助项目(NCET-05-0194).
Received 20051109, received in revised
form 20060327 |