Automated quality control of printed flasks and bottles |
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Authors: | Enrico Grosso Andrea Lagorio Massimo Tistarelli |
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Affiliation: | (1) Department of Mechanical Engineering, College of Engineering, University of Texas at El Paso, 500 W. University Ave, El Paso, TX 79968, USA;(2) Wake Forest Institute for Regenerative Medicine, Winston-Salem, NC 27157, USA;(3) Department of Bioengineering, Clemson University, Clemson, SC 29634, USA |
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Abstract: | The paper faces the quality control problem for printed flasks, bottles and cans, used as containers for drugs and beverages.
The control is mainly aimed at identifying ink spots and faded prints produced by a serigraphic process, but the approach
is generically applicable to any kind of printing and printed cylindrical surface. Differently from the existing systems,
based on the acquisition of good printed samples, the automatic control is based on the original digital image feeded to the
printing system. Therefore, the control takes place directly between the ideal model and the result of a complex printing process including a number of distortion and noise sources. Problems related to image
acquisition, reconstruction and alignment are investigated; a novel technique for image-model verification, based on adaptive
local deformation, is also proposed and tested over a significant set of samples. A complete prototype system designed for
such quality control is finally described and its operating capability on the field is discussed. |
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Keywords: | |
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