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Sensors 2014, 14(8), 15084-15112; doi:10.3390/s140815084

Stability Analysis for a Multi-Camera Photogrammetric System

1
Department of Geomatics Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada
2
NovAtel Inc., 1120 68th Avenue NE, Calgary, AB, T2E 8S5, Canada
*
Author to whom correspondence should be addressed.
Received: 6 June 2014 / Revised: 7 August 2014 / Accepted: 11 August 2014 / Published: 18 August 2014
(This article belongs to the Special Issue State-of-the-Art Sensors in Canada 2014)
View Full-Text   |   Download PDF [1262 KB, uploaded 18 August 2014]   |  

Abstract

Consumer-grade digital cameras suffer from geometrical instability that may cause problems when used in photogrammetric applications. This paper provides a comprehensive review of this issue of interior orientation parameter variation over time, it explains the common ways used for coping with the issue, and describes the existing methods for performing stability analysis for a single camera. The paper then points out the lack of coverage of stability analysis for multi-camera systems, suggests a modification of the collinearity model to be used for the calibration of an entire photogrammetric system, and proposes three methods for system stability analysis. The proposed methods explore the impact of the changes in interior orientation and relative orientation/mounting parameters on the reconstruction process. Rather than relying on ground truth in real datasets to check the system calibration stability, the proposed methods are simulation-based. Experiment results are shown, where a multi-camera photogrammetric system was calibrated three times, and stability analysis was performed on the system calibration parameters from the three sessions. The proposed simulation-based methods provided results that were compatible with a real-data based approach for evaluating the impact of changes in the system calibration parameters on the three-dimensional reconstruction. View Full-Text
Keywords: system calibration; simulation-based stability analysis; forward/backward projection; image/object space parallax; normalized coordinate generation system calibration; simulation-based stability analysis; forward/backward projection; image/object space parallax; normalized coordinate generation
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Habib, A.; Detchev, I.; Kwak, E. Stability Analysis for a Multi-Camera Photogrammetric System. Sensors 2014, 14, 15084-15112.

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