EXPLOITING MULTI-CAMERA CONSTRAINTS WITHIN BUNDLE BLOCK ADJUSTMENT: AN EXPERIMENTAL COMPARISON
- 1Dept. of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
- 2LASTIG, Univ. Gustave Eiffel, ENSG, IGN, F-94160 Saint-Mande, France
- 33D Optical Metrology (3DOM) unit, Bruno Kessler Foundation (FBK), Trento, Italy
- 4Polytechnic Department of Engineering and Architecture, University of Udine, Udine, Italy
Keywords: bundle block adjustment, multi-head camera systems, oblique images, constrained cameras, orientation
Abstract. The growing deployment of multi-head camera systems encouraged the emergence of specific processing algorithms, able to face the challenges posed by slanted view geometry. Such multi-camera systems are rigidly tied by their manufacturers hence the exploitation of this internal constraint should be further exploited. Several approaches have been proposed to deal with orientation constraints, with the aim of reducing the number of unknowns, computational time and possibly improve the accuracy. In this paper we compare the results provided by publicly available implementations in order to further investigate the advantages of enforcing relative orientation constraints for aerial and terrestrial triangulation of multi-head camera systems. Data from a Leica CityMapper and a Stereopolis-Ladybug are considered, reporting how constrained solution can improve accuracy with respect to traditional (unconstrained) bundle block adjustment solutions.