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http://dx.doi.org/10.7780/kjrs.2010.26.5.593

Bundle Block Adjustment of Omni-directional Images by a Mobile Mapping System  

Oh, Tae-Wan (Department of Geoinformatics, The University of Seoul)
Lee, Im-Pyeong (Department of Geoinformatics, The University of Seoul)
Publication Information
Korean Journal of Remote Sensing / v.26, no.5, 2010 , pp. 593-603 More about this Journal
Abstract
Most spatial data acquisition systems employing a set of frame cameras may have suffered from their small fields of view and poor base-distance ratio. These limitations can be significantly reduced by employing an omni-directional camera that is capable of acquiring images in every direction. Bundle Block Adjustment (BBA) is one of the existing georeferencing methods to determine the exterior orientation parameters of two or more images. In this study, by extending the concept of the traditional BBA method, we attempt to develop a mathematical model of BBA for omni-directional images. The proposed mathematical model includes three main parts; observation equations based on the collinearity equations newly derived for omni-directional images, stochastic constraints imposed from GPS/INS data and GCPs. We also report the experimental results from the application of our proposed BBA to the real data obtained mainly in urban areas. With the different combinations of the constraints, we applied four different types of mathematical models. With the type where only GCPs are used as the constraints, the proposed BBA can provide the most accurate results, ${\pm}5cm$ of RMSE in the estimated ground point coordinates. In future, we plan to perform more sophisticated lens calibration for the omni-directional camera to improve the georeferencing accuracy of omni-directional images. These georeferenced omni-directional images can be effectively utilized for city modelling, particularly autonomous texture mapping for realistic street view.
Keywords
Omni-directional Camera; Mobile Mapping System; Bundle Block Adjustment; Accuracy Analysis; Sensor Fusion;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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