Download Visual Perception and Robotic Manipulation: 3D Object by Geoffrey Taylor, Lindsay Kleeman PDF

By Geoffrey Taylor, Lindsay Kleeman

As self sufficient robots extend into the carrier area, new suggestions to the problem of working in household environments needs to be constructed. common adoption of carrier robots calls for excessive robustness to environmental swap and operational put on, and minimum reliance on software particular wisdom. As such, wealthy sensing modalities reminiscent of imaginative and prescient will play a imperative function of their good fortune. This ebook takes steps in the direction of the conclusion of household robots via proposing an built-in platforms view of machine imaginative and prescient and robotics, masking basic issues together with optimum sensor layout, visible servoing, 3D item modelling and popularity, and multi-cue monitoring, with an effective emphasis on robustness all through. With in-depth therapy of either concept and implementation, broad experimental effects and accomplished multimedia help together with movies, VRML info, C++ code and lecture slides, this booklet has large entice either theoretical and functional roboticists and stands as a worthy instructing resource.

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Recent results show that this issue can be avoided by decoupling the control of orientation and translation [83, 97, 129]. As noted earlier, position-based visual servoing requires explicit reconstruction of the robot and target pose, which imposes a greater computational burden than image-based control [68]. Furthermore, pose estimation typically relies on knowledge of the camera parameters and a precise 3D model of the object. In contrast to image-based control, the accuracy of the controller is therefore sensitive to both camera calibration and the chosen pose estimation algorithm [31].

3). 20) 16 2 Foundations of Visual Perception and Control X x principal point f Z optical centre y optical axis x image plane X Y Fig. 2. Pin-hole camera model. 2 Sensor Models This section describes how to analytically model the major components of a robotic vision system, namely the projective camera and active stereo head. Specific models for the experimental platform described in Chapter 7 are developed, but the general approach applies to a wide range of platforms. These models will be revisited in later chapters as the basis of algorithms and error analyses.

Radial distortion and correction. camera. This distortion would lead to significant errors in depth measurement and tracking if left uncorrected. 27) where x is the position of an undistorted feature, xr is the distorted position and cr is the radial distortion centre (not necessarily at the optical centre). In practice, the distortion function is approximated by estimating only the first four coefficients Ki , i = 1, . . , 4. 3 should contain only straight lines when observed through an ideal pin-hole camera.

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