Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2013 · 14 citations · 0 references
Phase-shifting Fringe ProjectionEngineeringMeasurementInterferometryImage AnalysisCalibrationCamera CalibrationComputational GeometryGeometric ModelingCorrespondence ProblemMachine VisionStatistical Pattern ProjectionFast MeasurementsFreeform OpticRange ImagingOptical TolerancingComputer VisionPhase RetrievalNatural SciencesComputer Stereo VisionDigital PhotogrammetryGeometrical OpticDelaunay TriangulationActive Triangulation Systems3D ScanningOptical System Analysis
Active triangulation systems are widely used for precise and fast measurements. Many different coding strategies have been invented to solve the correspondence problem. The quality of the measurement results depends on the accuracy of the pixel assignments. The most established method uses phase shifted-patterns projected on the scene. This is compared to a method using statistical patterns. In both coding strategies, the number and the spatial frequency of the projected patterns is varied. The measurements and calculations for all presented results were done with exactly the same measurement setup in a narrow time window to avoid any changes and to guarantee identical technical preconditions as well as comparability.