E. Malis, F. Chaumette, S. Boudet. 2 1/2 D Visual Servoing. IEEE Trans. on Robotics and Automation, 15(2):238-250, April 1999.
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We propose an approach to vision-based robot control, called 2 1/2 D visual servoing, which avoids the respective drawbacks of classical position-based and image-based visual servoing. Contrary to the position-based visual servoing, our scheme does not need any geometric three-dimensional model of the object. Furthermore and contrary to image-based visual servoing, our approach ensures the convergence of the control law in the whole task space. 2 1/2 D visual servoing is based on the estimation of the partial camera displacement from the current to the desired camera poses at each iteration of the control law. Visual features and data extracted from the partial displacement allow us to design a decoupled control law controlling the six camera DOFs. The robustness of our visual servoing scheme with respect to camera calibration errors is also analyzed: the necessary and sufficient conditions for local asymptotic stability are easily obtained. Then, due to the simple structure of the system, sufficient conditions for global asymptotic stability are established. Finally, experimental results with an eye-in-hand robotic system confirm the improvement in the stability and convergence domain of the 2 1/2 D visual servoing with respect to classical position-based and image-based visual servoing
@article{Malis99a,
Author = {Malis, E. and Chaumette, F. and Boudet, S.},
Title = {2 1/2 D Visual Servoing},
Journal = {IEEE Trans. on Robotics and Automation},
Volume = { 15},
Number = {2},
Pages = {238--250},
Publisher = {IEEE},
Month = {April},
Year = {1999}
}
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