title: Multiresolution approach based on projection matrices.
abstract: Active triangulation measurement systems with a rigid geometric configuration are inappropriate for scanning large objects with low measuring tolerances. The reason is that the ratio between the depth recovery error and the lateral extension is a constant that depends on the geometric setup. As a consequence, measuring large areas with low depth recovery error requires the use of multiresolution techniques. We propose a multiresolution technique based on a camera-projector system previously calibrated. The method consists of changing the camera or projector's parameters in order to increase the system depth sensitivity. A subpixel retroprojection error in the self-calibration process and a decrease of approximately one order of magnitude in the depth recovery error can be achieved using the proposed method.
authors.affiliation: Optics Department, Universidad Complutense de Madrid, Facultad de CC, Físicas,Ciudad Universitaria s/n, 28040 Madrid, Spain. jvargas@fis.ucm.es
authors.forename: Javier
authors.initials: J
authors.lastname: Vargas
authors.forename: Juan Antonio
authors.initials: JA
authors.lastname: Quiroga