Abstract As the need for manufacturing of complex surface topographies increases, traceable measurement with known uncertainties can allow a process to remain stable. Material measures are link in chain that connects topography instrument’s output definition metre. In this review, use material is examined purposes instrument calibration and performance verification based on metrological charact...

Controlling the mechanical properties of metallic parts produced by additive manufacturing remains challenging. The behavior is mainly related to microstructure, which depends on process parameters and strategies. scanning speed one key that can be modulated during (according kinematic machine tool) in order reach different microstructures. Thus, this work, an experimental study laser metal pow...

Airborne hyperspectral imaging plays an increasingly important role in environmental monitoring. However, due to the limitations of acquisition conditions, there are uneven radiation and chromatic aberrations mosaic data. Accurate preprocessing original data is premise qualitative quantitative remote sensing. In this study, we proposed a comprehensive distortion correction method that integrate...

This paper discusses two aspects for filtering Digital Surface Models namely the derivation of parameters for filtering based on a segmentation of laser scanner data and the detection of breaklines. A problem associated with the successful filtering of laser data is the determination of appropriate thresholds used to classify the single height values. Heterogeneous areas, like areas including f...

Extensive alteration of the tidal salt marshes of San Francisco Bay has created an urgent need to preserve the few remaining areas of relatively pristine tidal marshes. The dynamics of these marshes can be quantified and mapped using the high vertical and horizontal point density of airborne laser scanners (lidar) if their data quality is adequate. We evaluated lidar’s ability to characterize w...

In this paper we introduce a new approach for recovering shape-from-shading (SFS) from synthetic aperture radar (SAR) images of the terrain. Three contributions are proposed. Firstly, we show how the direction of surface normals is constrained by the geometry of the radar reflectivity cone. Second, we show how topographic features can be used as boundary constraints on the recovered surface nor...

A hierarchical model of the brain has been developed, based on the ARTTM system, in which nodes represent the structures of interest, and arcs represent 3-D topographical relationships between organs and part-of relationships. The nodes contain attributes of the organs which encode their expected shape and identifying features; they also attach to the recognition rules, which use the measured a...

This paper describes work aimed at consistently labelling surface facets using topographic classes derived from mean and Gaussian curvature measurements. There are two distinct contributions. Firstly, we develop a statistical model which allows label probabilities to be assigned to the di!erent topographic classes. These probabilities capture uncertainties in the computation of surface curvatur...

An efficient finite volume approach has been used to develop a three dimensional Helmholtz acoustic solver for complex geometries. This acoustic solver was utilized to obtain characteristic mode shapes and frequencies of a baffled combustion chamber. An experimental setup, including stationary and moving sensors, has also been used to measure these quantities for the same model combustion chamb...

A new landslide mobility parameter that takes the friction angle into account can shed new light into the dynamics of large Martian landslides. Introduction: Landslide morphologies have been identified on Mars [1-2]. Some similarities between experiments on dry granular spreading and Large Martian Landslides (LML) convey to conlude on dry conditions [3]. However, normalized runout on Mars is tw...