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Open AccessArticle

A Two-Phase Space Resection Model for Accurate Topographic Reconstruction from Lunar Imagery with PushbroomScanners

1
School of Computer Science and Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China
2
School of Computing and Information Sciences, Caritas Institute of Higher Education, Tseung Kwan O, N.T., Hong Kong 999077, China
3
School of Computer Science, South China Normal University, Guangzhou 510631, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Raad A. Saleh
Sensors 2016, 16(4), 507; https://doi.org/10.3390/s16040507
Received: 25 October 2015 / Revised: 27 March 2016 / Accepted: 4 April 2016 / Published: 11 April 2016
(This article belongs to the Section Physical Sensors)
Exterior orientation parameters’ (EOP) estimation using space resection plays an important role in topographic reconstruction for push broom scanners. However, existing models of space resection are highly sensitive to errors in data. Unfortunately, for lunar imagery, the altitude data at the ground control points (GCPs) for space resection are error-prone. Thus, existing models fail to produce reliable EOPs. Motivated by a finding that for push broom scanners, angular rotations of EOPs can be estimated independent of the altitude data and only involving the geographic data at the GCPs, which are already provided, hence, we divide the modeling of space resection into two phases. Firstly, we estimate the angular rotations based on the reliable geographic data using our proposed mathematical model. Then, with the accurate angular rotations, the collinear equations for space resection are simplified into a linear problem, and the global optimal solution for the spatial position of EOPs can always be achieved. Moreover, a certainty term is integrated to penalize the unreliable altitude data for increasing the error tolerance. Experimental results evidence that our model can obtain more accurate EOPs and topographic maps not only for the simulated data, but also for the real data from Chang’E-1, compared to the existing space resection model. View Full-Text
Keywords: space resection; recovery of exterior orientation parameters; lunar topographic reconstruction; push broom scanners; lunar elevation measurements space resection; recovery of exterior orientation parameters; lunar topographic reconstruction; push broom scanners; lunar elevation measurements
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Xu, X.; Zhang, H.; Han, G.; Kwan, K.C.; Pang, W.-M.; Fang, J.; Zhao, G. A Two-Phase Space Resection Model for Accurate Topographic Reconstruction from Lunar Imagery with PushbroomScanners. Sensors 2016, 16, 507.

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