The paper describes aspects of research being undertaken on the determination and processing of digital elevation models. A 2-D Kalman filter has been developed based on dynamic and functional models for a grid DEM, to produce optimal estimates of terrain attributes of a DEM point using the relevant observations, and predictions derived from its orthogonal neighbouring points. A further method ...

Digital terrain models can be created by gathering a set of measurements from geometric objects. For various reasons, these models may be incomplete such that fail to meet the requirements defined by their potential applications. In this work, we develop a novel multiresolution approach to repair the voids commonly found in digital elevation models (DEM). We use the overall shape and structure ...

In this work, in experimental phase, the digital elevations models (DEMs) appear as a fundamental tool for studying erosion of the land in a concrete zone of agricultural production, olives production. Collected data from the zone of study in different campaigns are used to determine possible variations in the orography of the land. GPS is the used tool to measuring coordinates of points in the...

Estimations of the local roughness of Digital Elevation Models (DEMs) have been used both for a better geological understanding of terrain structures and for a more accurate DEM interpolation leading to higher resolution terrain maps. This work investigates two fractal dimension estimators for the characterization of the roughness of DEMs: the power spectrum estimator and the wavelet-based esti...

We propose an optimization approach to speed up the point matching process underlying the 3D reconstruction of complex urban scenes. We consider the Optical Flow technique for point matching and propose to introduce MMX and SSE2 instructions to accelerate significantly the matching process. Fast point matching allows using sub-pixel image resolution, which provides a more accurate estimation of...

The use of topographic airborne LiDAR data has become an essential part archaeological prospection, and the need for archaeology-specific processing workflow is well known. It therefore surprising that little attention been paid to key element processing: DEM. Accordingly, aim this paper describe DEM in detail, provide a tool its automatic precision assessment, determine appropriate grid resolu...