Interpolation Method of 3D Position Errors Decreasing in the System of Two Cameras

Abstract

This chapter proposes the method of 3D position errors decreasing in the system of two cameras. The analysis of determining accuracy of the 3D coordinates of points on the plane template in the shape of rectangle is presented. Each of these points lie at the corners of squares with side of 8 mm. An images of these points were obtained using Edimax IC-7100P cameras from two different points of view and analysed. The position and orientation coordinates of camera relatively to the reference system were calculated. The coordinates of points on the ideal image (without optical distortions) were determined. After reading from the image real coordinates, optical distortion model coefficients of the camera were calculated. After that, errors caused by optical distortion were determined. The coordinates read from the image were corrected and coordinates of observed points in the reference system were calculated. Next to decreasing computed 3D position errors the interpolation method was proposed. In this method the interpolation of errors between ideal and real coordinates of image points was used. Finally, calculated coordinates were compared to them real values and them maximal differences were determined.