|M.Sc Student||Halpern Oren|
|Subject||Self Calibration of an Airial Camera, Using Airborn GPS Data|
and Accurate Control Points
|Department||Department of Civil and Environmental Engineering||Supervisor||Assistant Professor Uzi Ethrog|
The thesis examines the use of self calibration as an alternative method to laboratory calibration in aerial photogrammetry. The thesis contains a theoretical part and a practical part. The theoretical part is composed of three stages: in the first stage a self calibration algorithm is developed, together with a simulation for its testing. The simulation is designed so it could also predict the self calibration parameters' accuracies, based on the different block characteristics. In the second stage the simulation is used for studying the effects of different block characteristics on the self calibration parameters' accuracies, and in the third stage optimal block characteristics are found, which make self calibration parameters as accurate as possible (preferably at least as accurate as laboratory calibration parameters). The practical part is composed of two stages: In the first stage the self calibration parameters' accuracies of a real photogrammetric block are examined and compared to the accuracies predicted by a simulation, and in the second stage the solution accuracy of the real block is examined, using calibration parameters, once from self calibration and once from laboratory calibration. The thesis main conclusion is that self calibration can be used instead of laboratory calibration, because the solution accuracy of the photogrammetric block when using the self calibration parameters is as good as the solution accuracy when using the laboratory calibration parameters, and because by choosing the appropriate block characteristics, it is possible to reach self calibration parameters' accuracies which are as good as laboratory calibration parameters' accuracies.