Dimensional or shape checking and gauging is one of the most demanding applications of industrial image processing, algorithmically as well as with regard to systems engineering and facility construction. It is actually possible to reach accuracies of just a few light wavelengths, but this requires considerable effort. As in every technical discipline, precise results cannot be achieved without corresponding diligence, especially with regard to peripherals, selection of components, mechanical setup, illumination, and image capture. Quality lost in the sensory chain is lost forever. For this reason, an overview chapter on illumination and image capturing will immediately follow this chapter.
KeywordsSearch Line Test Piece Position Adjustment Calibration Target Centroid Distance
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