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：2009
卷号：XXXVIII-3/W8
页码：265-270
出版社：Copernicus Publications
摘要：For the first time the basic principle to unify advantages between active sensors and the simultaneous capturing of an image for an extended area of dynamical 3D applications in close range is given by range imaging (RIM) sensors. The drawback of data which is captured with RIM sensors is the absolute range accuracy and the limited non-ambiguity range. From other sensor systems different techniques are known to solve this problem in order to obtain a non-ambiguity range, e.g. by utilizing different modulation frequencies as most continuous-wave (CW) modulated laser scanner and radar systems do or by (pseudo) random modulation. In this paper a post-processing task is presented. The Goldstein 2D unwrapping procedure for unwrapping the range ambiguities of ranging sensors (e.g. RIM sensors or CW-modulated laser scanners) is proposed considering residues, branch cuts and tree estimation strategies and additionally confidence criteria. It could be shown that a range restoration for numerous periods of the ambiguity range is in principle possible with the presented 2D unwrapping procedure
关键词：Range imaging; RIM; ambiguous; phase-unwrapping; modulation frequency; close range
