Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6922905 | Computers & Geosciences | 2014 | 9 Pages |
Abstract
A new digital elevation model (DEM) is presented for accurate surface representation in photogrammetric processing of stereo ground-based imagery. This model is named the continuative variable resolution DEM (cvrDEM). In contrast to traditional grid-based DEMs that have only one fixed resolution, this new model can provide resolutions that vary depending on the range represented in the ground-based imagery. Functions for deriving radial and angular resolutions from the cvrDEM have been derived, and a corresponding storage structure for the polar coordinates has been developed. Experimental results using publically available NASA Mars Exploration Rover 2003 imagery demonstrate the effectiveness of the cvrDEM model: It can significantly reduce storage space while fully maintaining the most useful level of mapping accuracy relevant to the range from the imaging station. A terrestrial laser scanning data set was also used to validate the effectiveness of the cvrDEM.
Related Topics
Physical Sciences and Engineering
Computer Science
Computer Science Applications
Authors
Zhaoqin Liu, Man Peng, Kaichang Di,