Localisation and mapping
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United States of America Patent
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Nov 21, 2017
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app pub date -
Jul 25, 2013
filing date -
Jul 30, 2012
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Abstract
A method generates a three-dimensional map of a region from successive images of the region captured from different camera poses. The method detects feature points within the captured images and designates a subset of the images as a set of keyframes each having camera pose data and respective sets of measurement data representing image positions of landmark points detected as feature points in that image. The method also includes performing bundle-adjustment to generate bundle-adjusted landmark points by iteratively refining the three dimensional spatial positions of the landmarks and the camera pose data associated with at least a subset of the keyframes. And for a feature point, not corresponding to a bundle-adjusted landmark point, detected at an intervening image which is not a keyframe and present in another intervening image which is not a keyframe, the method generates a non-bundle-adjusted point corresponding to that feature point and derives a camera pose.
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