Emmanuel Baltsavias

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An overview of basic relations and formulas concerning airborne laser scanning is given. They are divided into two main parts, the first treating lasers and laser ranging, and the second one referring to airborne laser scanning. A separate discussion is devoted to the accuracy of 3D positioning and the factors influencing it. Examples are given for most(More)
The paper focuses mainly on extraction of important topographic objects, like buildings and roads, that have received much attention the last decade. As main input data, aerial imagery is considered, although other data, like from laser scanner, SAR and high-resolution satellite imagery, can be also used. After a short review of recent image analysis(More)
Investigations on the radiometric and geometric characteristics of IKONOS Geo satellite imagery and its use for orthoimage generation and 3D building reconstruction are reported. The paper first starts with an analysis of the radiometric quality of IKONOS Geo images of varying preprocessing and type, focussing on noise, edge quality and definition, and(More)
This volume is a collection of 36 papers from the second bi-annual Ascona conference, held in Ascona, Switzerland, in May, 1997. Nearly all major US and European research laboratories which work on applications of computer vision to mapping are represented. As such, this book provides valuable documentation of stateof-the art results in feature extraction(More)
8 An investigation of the application of 1-m Ikonos satellite imagery to 3D point positioning and building reconstruction is 9 reported. The focus of the evaluation of Geo panchromatic imagery has been upon 3D positioning accuracy, radiometric quality 10 and attributes of the image data for building feature extraction. Following an initial review of(More)
Road network extraction from aerial images has received attention in photogrammetry and computer vision for decades. We present a concept for road network reconstruction from aerial images using knowledge-based image analysis. In contrast to other approaches, the proposed approach uses multiple cues about the object existence, employs existing knowledge,(More)
An investigation of the application of 1-m Ikonos satellite imagery to 3D point positioning and building reconstruction is reported. The focus of the evaluation of Geo panchromatic imagery has been upon 3D positioning accuracy, radiometric quality and attributes of the image data for building feature extraction. Following an initial review of(More)
The project ATOMI is a co-operation between the Federal Office of Topography (L+T) and ETH Zurich. The aim of ATOMI is to update vector data of road centerlines and building roof outlines from 1:25,000 maps, fitting it to the real landscape, improve the planimetric accuracy to 1m and derive height information (one representative height for each building)(More)
Georeferenced high-resolution satellite images can be used for acquisition of topographic information, navigation and visualisation for various environmental studies. The present study is part of the multidisciplinary EU project GEOWARN related to monitoring, warning and emergency planning for volcanic hazards in the island of Nisyros, Greece. Here, the(More)