Calibration of Dynamic Stereo and Binocular Stereo for Large Scale Objects
نویسندگان
چکیده
This thesis mainly deals with large scale objects of height around 1.5 meters. It uses a dynamic stereo model or a binocular stereo model to calibrate and reconstruct a 3D large scale object. This thesis briefly introduces two basic calibration techniques, i.e. DLT calibration technique and Tsai’s calibration technique. It then discusses and evaluates the impact of different factors on the calibration system, especially the size of an object, the distance between the camera and the calibration object, the number of calibration points and its distribution pattern, the method for finding the center of a calibration mark, the covered area by a calibration object in an image and the calibration error distribution around the object height. The thesis extends Tsai’s calibration method and builds up two mathematical models. One model is the dynamic stereo system (one camera + one turntable system). The other is the binocular stereo system. It then demonstrates the corresponding calibration methods and evaluates the accuracies of these two systems in reconstructing a 3D object respectively. Problems of the dynamic stereo system are also discussed. From the results of evaluation, the accuracy of the binocular stereo system is much better than the dynamic stereo system.
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