期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2010
卷号：XXXVIII - Part 5
页码：405-410
出版社：Copernicus Publications
摘要：The following paper discusses the use of 3D reference bodies for the assessment of measurement accuracy of free-form surface measurement systems. Reference bodies are mechanical structures with calibrated values in terms of given coordinates, distances or surfaces. Standardised guidelines exist for the determination of limited performance characteristics such as probing error or sphere distance error, that are basically used for fringe projection systems. Since free-form surfaces usually consist of a variety of surface shapes and structures of different size and curvature, it is worthwhile to discuss the use of free-form reference bodies for performance evaluation. Two different reference objects have been designed and tested with different surface measurement methods: fringe projection, laser tracking, laser scanning with articulated arm and least squares stereo matching. The first reference object is designed for static measurement purposes, the second one is used for the verification of dynamic surface deformations. Both objects provide local reference points and can be calibrated by different techniques. In particular, the references are used to check the ability of area-based matching methods, both in static and dynamic scenes. In the recent implementation of the P ISA system different geometric models and matching strategies can be selected. It can be proven that least squares matching with polynomial transformation of second order yield best results
