Problems of precise target location and camera orientation in digital close-range photogrammetry

Josef Jansa; Yong Ru Huang; John Charles Trinder

doi:10.1117/12.162122

22 October 1993 Problems of precise target location and camera orientation in digital close-range photogrammetry

Josef Jansa, Yong Ru Huang, John Charles Trinder

Proceedings Volume 2067, Videometrics II; (1993) https://doi.org/10.1117/12.162122
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

A close-range application for medical purposes uses video CCD cameras and a control field of small balls for camera calibration and orientation. The spherical shape enables robust detection as the image of ball must always be very similar to a circle. Partly occluded or shadowed control points can be detected and rejected. On the other hand this shape is sensitive to illumination effect which influences the point location procedures. Erroneously located points might not be detected during orientation, thus causing distortions of the restituted 3D object. This article investigates the effect which can occur and checks the robustness of various point locating methods by using simulated examples. Edge extraction and feature matching can deliver good results. Finally one method based on Forstner operator is presented.

Citation Download Citation

Josef Jansa, Yong Ru Huang, and John Charles Trinder "Problems of precise target location and camera orientation in digital close-range photogrammetry", Proc. SPIE 2067, Videometrics II, (22 October 1993); https://doi.org/10.1117/12.162122

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