A Study On Positioning Algorithms Of CCD Imagery Based On Dual Quaternion

Due to its flexibility,high resolution,low cost and so on.The stereo geo-positioning system of high-precision line-array CCD image has been widely applied on natural disaster hazard prevention and evaluation,land use investigation and other applications.However,it’s hard to calculate the high precision outer orientation elements on account of the strong correlation in orientation parameters of traditional linearization collinear equation which resulted from the narrow light beam and small angle of coverage of line-array CCD image.Aiming at this problem,the paper starts with the perspective of the construction of rotation matrix and translation vector method,applying the dual quaternion to photogrammetry stereotaxic decoding by using its exhibition of the parameters of rotation and displacement.The main achievements are summarized as follows:1.Making a comprehensive study on the subjects related to the theory of dual quaternion and spatial similarity transformation in photogrammetry,putting forward a new close-form solution of spatial similarity transformation based on dual quaternion.Dual quaternion is applied to describe the rotation matrix and translation vector parameters in spatial similarity transformation model,and check correctness of the model as well by simulating calculation.2.Introducing dual quaternion theory to the line-array CCD images’ stereo geo-positioning technology with its rotation matrix and translation vector parameters in image transform,a globally convergent space resection algorithm of relative pose estimation is designed and derived.In this algorithm,the space resection problem of 3D space to 2D space is translated into spatial similarity transformation problem of 3D space to 3D space.Then,using iterative method to solve the exterior orientation elements of linear-array CCD image.Finally,the correctness and effectiveness and stability of the algorithm is verified by a simulation experiment.3.The line-array CCD images’ stereo geo-positioning technology was implemented in space intersection algorithm which was presented by least square method and line-array CCD images’ exterior orientation that realized by globally convergent space resection algorithm model based on dual quaternion together.The designing of ground experiment further verified the whole algorithm,and compared its results with the measurement of Leica TCA 2003 robot kinematics.The results showed that the deformation monitoring algorithm could meet demand with its high precision,high stability and strong applicability,it has practical reference value.