title: Metric Potential of a 3D Measurement System Based on Digital Compact Cameras.
abstract: This paper presents an optical measuring system based on low cost, high resolution digital cameras. Once the cameras are synchronised, the portable and adjustable system can be used to observe living beings, bodies in motion, or deformations of very different sizes. Each of the cameras has been modelled individually and studied with regard to the photogrammetric potential of the system. We have investigated the photogrammetric precision obtained from the crossing of rays, the repeatability of results, and the accuracy of the coordinates obtained. Systematic and random errors are identified in validity assessment of the definition of the precision of the system from crossing of rays or from marking residuals in images. The results have clearly demonstrated the capability of a low-cost multiple-camera system to measure with sub-millimetre precision.
authors.affiliation: Geomatics Engineering Research Group. University of León, Avda. Astorga s/n, 24400 Ponferrada, Spain; E-Mail:  jr.rodriguez@unileon.es.
authors.forename: Enoc
authors.initials: E
authors.lastname: Sanz-Ablanedo
authors.forename: José Ramón
authors.initials: JR
authors.lastname: Rodríguez-Pérez
authors.forename: Pedro
authors.initials: P
authors.lastname: Arias-Sánchez
authors.forename: Julia
authors.initials: J
authors.lastname: Armesto