Offset printing plate quality sensor on a low-cost processor

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The aim of this work is to develop a microprocessor-based sensor that measures the quality of the offset printing plate through the introduction of different image analysis applications. The main features of the presented system are the low cost, the low amount of power consumption, its modularity and easy integration with other industrial modules for printing plates, and its robustness against noise environments. For the sake of clarity, a viability analysis of previous software is presented through different strategies, based on dynamic histogram and Hough transform. This paper provides performance and scalability data compared with existing costly commercial devices. Furthermore, a general overview of quality control possibilities for printing plates is presented and could be useful to a system where such controls are regularly conducted.
© 2013 by the authors; licensee MDPI, Basel, Switzerland. The authors would like to thank the Faculty of Graphic Arts at the University of Zagreb for providing printing plate templates and technical support. This work was partially supported by Spanish research project, CICYT-TIN 2008/508 and CICYT-TIN 2012-32180 and by Croatian Ministry of Science, Education and Sports Grants, No.: 128-1201785-2228.
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