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：2008
卷号：XXXVII Part B1
页码：473-480
出版社：Copernicus Publications
摘要：Integration of airborne laser scanning (ALS) point clouds and aerial images has a great potential for accurate and robust 3D modeling and recognition of objects in our environment. The integration requires, however, an accurate registration of data sources, which cannot be yet achieved by direct georeferencing using both the GPS and IMU. This research paper presents a method for registering aerial images with ALS data and for evaluating the accuracy of existing registration. An aerial image is included into a multi-scale image block, in which relative orientations of terrestrial close range images and aerial images are then known from the bundle block adjustment. Close range images provide more detailed view of possible tie features and also a new perspective compared to aerial images. For the actual registration of ALS data and image block, one or more images of the block can be chosen. Selected images can include only close range images or both close range images and aerial images. For the registration, the interactive orientation method was used. When selected images are registered with ALS data, the exterior orientations of all other images of the block can be calculated from the known relative orientations. Accuracies of interactive orientations were examined using the reference ALS point cloud that was transformed to the known geodetically determined coordinate system. The coordinate transformation was solved by applying the iterative closest point (ICP) method between the ALS data and the photogrammetrically derived 3D model, the absolute orientation of which was known. Before making experiments of interactive registration, the absolute orientation of the image block was changed in order to get incorrect initial orientation. The final results of interactive orientations were compared with the original orientation information from the bundle block adjustment. The comparison indicated that including an aerial image with a terrestrial image block, the registration of ALS data and aerial images can be improved or verified. The accuracy of the interactive registration was depended on selected images that were used in registration. The maximum differences between original and interactively solved locations of the aerial image varied between 2.3 and 9 cm
关键词：Laser scanning; Aerial Image; Terrestrial Photogrammetry; Data Integration; Quality control; Close Range ; Photogrammetry
