CCD Camera Calibration Technology Based on the Translation of Coordinate Measuring Machine

Abstract

A new CCD camera calibration method based on the translation of Coordinate Measuring Machine (CMM) is proposed. The CMM brings the CCD camera to produce the relative translation with respect to the center of the white ceramic standard sphere along the X, Y, Z axis, and the coordinates of the different positions of the calibration characteristic point in the probe coordinate system can be generated. Meanwhile, the camera captures the image of the white ceramic standard sphere at every position, and the coordinates of the calibration characteristic point in the computer frame coordinate system can be registered. The calibration mathematic model was established, and the calibration steps were given and the calibration system was set up. The comparing calibration result shows that precision of this method is equivalent to that of the special calibration method, and the difference between the calibrating data of these two methods is within ±1μm.

A Rapid Coordinate Transformation Method Applied in Industrial Robot Calibration Based on Characteristic Line Coincidence

“…For example, two images need to have a unified coordinate system for image matching [ 3 ]. In camera calibration, the coordinate systems of the image plane and the object plane need to be unified for the inner parameter calculation [ 4 ]. In robot systems, the coordinate system of the robot twist needs to be transformed to the tool center position (TCP) to obtain the correct pose of robot manipulators [ 5 , 6 ].…”