Multi-Line Scanners for 3D Surface Reconstruction - Experiences from HRSC and ADS40 Data Processing

Abstract

This contribution describes the experiences of more than 10 years of photogrammetric processing of multi-line scanner data. Automated procedures have originally been developed for processing of the different HRSC cameras, in operation on aircraft and since 4 years in space on the European Mars Express mission. Other types of airborne multi-line scanners can easily be integrated into the processing line, if interior orientation information is provided and continuous GPS/INS data have been measured. If a sensor comprises adequate stereo channels in matchable spectral bands, a 3D reconstruction of the visible surface can be performed by multi-image matching, multiple forward ray intersection, and surface model interpolation. Based on this surface model an ortho-rectification process can handle any channel in order to finally derive orthoimage mosaics (b/w or color) of overlapping image strips. A first integration of a Leica Geosystems ADS40 data set into the processing chain allowed for a precise photogrammetric restitution and the derivation of considerable 3D surface descriptions and orthoimage mosaics.