Citation Context

...or photogrammetric applications, the accuracy that can be accomplished with regular cameras is remarkable, but often limited by the geometric stability of the cameras (Gruen et al., 1995; Maas, 1999; =-=Shortis et al., 2006-=-). Different investigations have been made to model or compensate for the instable geometry of non-photogrammetric cameras. Conventional mathematical models for camera calibration assume a constant in...

Citation Context

...osition of the principal point, the principal distance and distortion parameters. Calibration tests on a range of different digital cameras, all within the SLR class, were conducted by Shortis et al. =-=[13]-=- to ascertain the differences between zoom and fixed lenses used with these cameras. The analyses presented indicate that there are differences between the two lens types in terms of accuracy, precisi...

Citation Context

...5mm and 50mmslenses will be acquired.sThe option of different fixed focal length lenses was a critical factor in the selection of thescamera, because of the instabilities associated with zoom lenses (=-=Shortis et al., 2006-=-) which would otherwise add tosthe inherent instability of the body (Rieke-Zapp et al., 2009) for this class of prosumer camera.sThe NEX 5 has a maximum image resolution of 4592 by 3056 pixels.sThe CM...

Citation Context

... This is because any unmodelled IOP errorssmay cause higher image space residuals (i.e., poorer precision), and also higher root mean squaredserrors (RMSE) for known distances (i.e., poorer accuracy) =-=[17]-=-. The down side of estimating asmeasure of equivalency for different sets of IOPs using real data and control information is that ansobject space test field or object space distances are needed for qu...