ROBUST ESTIMATION METHOD FOR ROTATION AXIS AND BARYCENTRE OF SPACE OBJECT BASED ON BINOCULAR LIGHT STREAM

摘要

Provided is an estimation method for a rotation axis and a barycentre of a space object based on a binocular light stream, comprising: respectively extracting feature points in a binocular sequence image in sequence, and calculating formed binocular light streams; removing an invalid region where a three-dimensional motion track is reconstructed from the binocular light streams of the feature points, so as to obtain the binocular light streams constrained by a valid region, and reconstructing a three-dimensional motion track of a space object; and removing a light stream region with a larger error of reconstructing a three-dimensional motion vector by way of multiple iterations, according to an obtained three-dimensional motion vector sequence of each feature point, estimating a rotation axis, conducting weighted average on a plurality of estimation results of the feature points, so as to obtain a space equation of the estimated rotation axes, and according to two estimated rotation axes, solving the space coordinates of a barycentre object in a simultaneous manner. The flow of the method can be used for observing space objects in the spin motion or the attitude adjusting state, thereby accurately and effectively reconstructing the three-dimensional rotation tracks of these space objects and estimating the rotation axes and barycentres of the space objects in the spin motion.