A seamless mosaic has been constructed including a 3D terrain model at 50 m grid-spacing and corresponding terrain-corrected orthoimage 12.5 using novel approach applied to ESA Mars Express High Resolution Stereo Camera orbital (HRSC) images of Mars. This method consists blending harmonising models normalising reflectance global albedo map. Eleven HRSC image sets were processed Digital Terrain ...

Airborne pushbroom systems for the direct acquisition of digital imagery enable the simultaneous capture of high quality 3D and multispectral information of a scene. The combination of geometric and radiometric information should improve tasks like DTM generation – usually solely based on stereo imagery – and landuse classification, which is traditionally restricted to the interpretation of spe...

This research work is concerned with the implementation of a shape from shading (SFS) technique for automatically generating a digital terrain model (DTM) using a single digitized aerial photograph of a terrain area with low signal (information) content. The mathematical model for the SFS is established based on the fact that the pixel’s gray level variations in image space are proportional to ...

Digital Terrain Model (DTM) databases are one of the more common tools for precise and continuous representation of our natural environment. New data acquisition technologies yield rapid and frequent updating of existing topographic databases (from here on it will be referred to as DTMs). These technologies present high accuracies and resolution levels that were not known until recently. As a r...

LIght Detection And Ranging (LIDAR) is a technique, which allows for measuring a huge amount of object point coordinates with accuracies up to some centimeters in short time. Their conversion into a highly accurate Digital Terrain Model (DTM) requires a careful handling of the single processing steps, from the flight planning until the manual revision of the generated DTM, considering the diffe...

We present an innovative way to autonomously classify LiDAR points into bare earth, building, vegetation, and other categories. One of the most desired commodities for LiDAR collection is a high resolution bare earth product with the same resolution as the input data. The LiteSite algorithm automatically extracts buildings and foliage from an urban scene and generates an accurate bare-earth pro...

The High Resolution Stereo Camera (HRSC) on Mars Express covers the surface of our neighboring planet in full color and 3D. Altogether, nine channels are obtained in stereo angles between ±18.9°. These data sets are well suited to derive Digital Terrain Models (DTM) and, based on that, color orthoimages. Both, photogrammetric standard processing of HRSC data as well as alternative and/or supple...

It has been suggested that airborne laser scanning (ALS) could be used for operational monitoring of vegetation changes in the alpine tree line caused by climate change. Because the vegetation is low in such tree-less areas close to the alpine zone, the accuracy of the digital terrain model (DTM) becomes crucial for early detection of, e.g., pioneer trees representing an ongoing tree migration ...

In this paper we describe the development of a three-dimensional (3D) imaging system for a 3500 tonne mining machine (dragline). Draglines are large walking cranes used for removing the dirt that covers a coal seam. Our group has been developing a dragline swing automation system since 1994. The system so far has been “blind” to its external environment. The work presented in this paper attempt...

SUMMARY Three Dimensional Building models are excessively used in various applications. Digital Surface Model is the back bone of the 3D building modeling. The automatic DTM generation techniques are not adequate for the built-up areas. The manual 3D digitization of the stereo images is time consuming. Establishing a semi-automatic technique for the 3D building modeling is required. The main go...