Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1997 · 10 citations · 0 references
EngineeringComputer-aided DesignShape DeviationsImage AnalysisFringe MaskDigital Image CorrelationFlexible Shape ControlEdge DetectionComputational GeometryGeometry ProcessingGeometric ModelingMachine VisionDesignRange ImagingComputer VisionFringe ProjectionNatural Sciences3D ScanningTechnology
Fast analysis of 3D shape deviations is obtained with fringe projection combined with moire filtering. A method is presented where an object adapted fringe mask is written in a matrix LCD and projected onto the test object. The object is detected by a CCD camera. Perfect objects yield regular fringe patterns. shape deviations results in distorted fringes. For moire filtering the periodic structure of the detecting CCD chip is exploited, therefore no image postprocessing is required, testing at video frame rate is possible.