Range imaging : a new method for high-resolution topographic measurements in small- and medium-scale field sites

Auteur(s) et Affiliation(s)



Description :
Range imaging, evaluated as an alternative method, is an emerging time-of-flight technology, using phase shift measurements on a multi-pixel sensor to generate a distance image of a surface. The AA. found ambient light and surface reflectivity to be the main factors affecting error in distance measurements. However, regardless of lighting conditions, the accuracy of range imaging was markedly improved by averaging multiple images of the same scene. To further test the suitability of range imaging for field applications the AA. measured a reach of a steep mountain stream (the Erlenbach, a small mountain stream located in the northern foothills of the Swiss Alp) with a horizontal resolution of approximately 1 cm (in the focal plane of the camera), allowing for the interpolation of a digital elevation model on a 2 cm grid. Comparison with an elevation model obtained from terrestrial laser scanning for the same site revealed that both models show similar degrees of topographic detail.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2013, vol. 38, n°. 8, p. 810-825, nombre de pages : 16, Références bibliographiques : 2 p.

Date :
2013

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley