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Subpixel location of discrete target images in close range camera calibration: a novel approach
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Evaluation of the Uncertainty of Edge Detector Algorithms
Full text linkThis paper deals with the analytical expression of the uncertainty on edge localization in image analysis applications. The analysis carried out relates analytically the uncertainty affecting the intensity of the input image to the output uncertainty of the edge detectors based on first- and second-derivative properties. The theoretical results are validated through experimental tests that are performed on real images that are acquired under typical conditions of an industrial environment
Metrological Characterization of a Vision-Based Measurement System for the Online Inspection of Automotive Rubber Profile
No full textA Comparison Between Stereo-Vision Techniques for the Reconstruction of 3-D Coordinates of Objects
Full text linkThis paper deals with the problems in setting up stereo-vision systems for contactless measurement of dimensional parameters in industrial environments. Two implicit calibration algorithms for the reconstruction of three-dimensional (3-D) real-world coordinates of objects from pairs of two-dimensional image coordinates have been implemented and compared. The former is based on a direct linear transformation, while the latter on an Artificial Neural Network (ANN). The results of the comparison made on artificial and real objects are finally reported in terms of statistical analysis of the reconstruction error
Metrological Characterization of a Vision-Based Measurement System for the Online Inspection of Automotive Rubber Profile
Full text linkThis paper deals with the metrological characterization of a stereovision-based measurement system for the inspection of automotive rubber profiles in an industrial plant. The characterization of this class of measurement systems introduces new challenges due to both the unavailability of reference measurement instruments and the complexity of the measurement system itself, which does not allow a straightforward application of the standard procedures for uncertainty evaluation. To assign optimum values to a number of design parameters, the followed approach focuses not only on evaluating the total uncertainty but also on analyzing systematic effects and influence quantities
NEW MEASUREMENT TECHNIQUES FOR THE ON LINE DIMENSION CHARACTERIZATION OF AUTOMOTIVE RUBBER PROFILES
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