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Image registration for visual inspection of imprinted pharmaceutical tablets

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Abstract

Image registration plays a vital role in visual quality inspection of tablets with imprints. In this paper, three registration methods, based on direct matching of pixel intensities, principal axes matching and circular profile matching, were proposed and objectively evaluated on real, large and representative image database (1,634 images) of various types of non-defective and defective tablets. Comparing against a devised “gold standard” registration and considering execution times and different registration tasks, circular profile matching method proved to be a powerful image processing tool for improving visual quality inspection of imprinted tablets in real time.

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Authors and Affiliations

  1. Faculty of Electrical Engineering, University of Ljubljana, Tržaška 25, 1000, Ljubljana, Slovenia

    Žiga Špiclin, Marko Bukovec, Franjo Pernuš & Boštjan Likar

  2. Sensum, Computer Vision Systems, Teslova 30, 1000, Ljubljana, Slovenia

    Marko Bukovec

Authors
  1. Žiga Špiclin
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  2. Marko Bukovec
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  3. Franjo Pernuš
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  4. Boštjan Likar
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Correspondence to Žiga Špiclin.

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Špiclin, Ž., Bukovec, M., Pernuš, F. et al. Image registration for visual inspection of imprinted pharmaceutical tablets. Machine Vision and Applications 22, 197–206 (2011). https://doi.org/10.1007/s00138-007-0104-0

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  • DOI: https://doi.org/10.1007/s00138-007-0104-0

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