Abstract: In order to solve the problem of image pose coupling calculating, this paper has established a high-precision hierarchical estimated pose parameters of image. Firstly, we select corresponding three image points of 3D points which constitute the largest area in image as a base to estimate the depth and translate information. Then based on the above method, we obtain the scale parameter of camera exterior information. Finally, the topic is transformed to a problem of estimating rotation relationship by vector, using Procrustes theory to obtain the best estimation of the angle elements of external parameters. The method can effectively solve problems which depth and coupling pose parameters can not deal with. Experimental results show that this method of determining position and orientation parameter estimation model is of briefness, easy convergence and it can also achieve higher parameter estimation accuracy than the direct projection matrix factorization.

Key words: homogeneous coordinates, direct linear transformation (DLT), base point, Procrustes method, pose estimation