The results in this paper have shown how precise geometrical information can be obtained from photographs taken with a camera that is not specifically designed for photogrammetric purposes. By referring the image coordinates to a system of targets in the field of view of the camera, in relation to which also the center of projection of the camera lens is defined, it has been possible to reconstruct the bundle of projecting rays with a high degree of precision without any information on the interior orientation of the camera. The application during experiments on vehicle redirection by cable barriers has been described. Comparisons with the analysis have been given to show how the accuracy of the measured responses is necessary for validating and diagnosing the comprehensive analysis made possible by today's large scale digital computers. The method seems to offer a suitable solution for measuring the position and parameters in a large number of applications involving moving objects. The simplicity of the instrumentation and the accurate information derivable from the photographic image will undoubtedly appeal to engineers and scientists working on similar projects.
Abstract