Albert Baumgartner

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Abstract. We propose a new approach for automatic road extraction from aerial imagery with a model and a strategy mainly based on the multi-scale detection of roads in combination with geometry-constrained edge extraction using snakes. A main advantage of our approach is, that it allows for the first time a bridging of shadows and partially occluded areas(More)
In this paper, we present work on automatic road extraction from high resolution aerial imagery taken over urban areas. In order to deal with the high complexity of this type of scenes, we integrate detailed knowledge about roads and their context using explicitly formulated scale-dependent models. The knowledge about how and when certain parts of the road(More)
This paper proposes an approach for automatic road extraction in aerial imagery which exploits the scale-space behavior of roads in combination with geometric constrained snake-based edge extraction. The approach not only has few parameters to be adjusted, but for the first time allows for a bridging of shadows and partially occluded areas using the heavily(More)
This paper approaches the problem of road extraction from three different directions. The first is the use of multiple scales. This combines detailed information of fine scale, like the markings, with abstract information of coarse scale, like the road network. The second direction is the extension of the multi-scale modeling with the context, i.e., the(More)
An approach for real-time object recognition in digital images based on the principle of the generalized Hough transform is proposed. It combines robustness against occlusions, distortions, and noise with invariance under rigid motion and local illumination changes. The computational effort is reduced by employing a novel efficient limitation of the search(More)
This paper focusses on the estimation of exterior orientation parameters of the High Resolution Stereo Camera (HRSC) orbiting planet Mars during the European Mars Express mission since January 2004. One of the challenges for the photogrammetric processing of HRSC images is the low number of Ground Control Points (GCPs) on Mars which can be identified and(More)
Im Rahmen geländeklimatologischer Versuche zum Zwecke genauer Standortsaufnahmen für die Forsteinrichtung am Großen Falkenstein wurde die Entwicklung einiger Baumarten und der Bodenflora in den Höhenlagen zwischen 600 und 1312 m in der Vegetationszeit 1955 beobachtet. Die Ergebnisse stellen ein Grundlagenmaterial für die klimatologische Standortsbeurteilung(More)