Vision-based evaluation of industrial workpieces can make efficient use of knowledge-based approaches, in particular for quality control, inspection, and accurate-measurement tasks. A possible approach is to compare real images with conceptual (synthetic) images generated by use of standard computer-aided design models, which include tolerances and take the application-specific conditions into account (e.g., the measured-calibration data). Integrated in (industrial) real-life environments, our evaluation methods have been successfully applied to on-line inspection of manufactured parts including sculptured surfaces, using structured light techniques for the reconstruction of three-dimensional shapes. Accuracies in the range 15–50 μm are routinely achieved by use of either isolated images or spatially registered image sequences.
© 2002 Optical Society of America
(100.2650) Image processing : Fringe analysis
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(150.0150) Machine vision : Machine vision
(150.3040) Machine vision : Industrial inspection
(150.6910) Machine vision : Three-dimensional sensing
Pierre Graebling, Alex Lallement, Da-Yi Zhou, and Ernest Hirsch, "Optical High-Precision Three-Dimensional Vision-Based Quality Control of Manufactured Parts by Use of Synthetic Images and Knowledge for Image-Data Evaluation and Interpretation," Appl. Opt. 41, 2627-2643 (2002)