Optical inline quality assessment of deep-drawn paperboard containers

Müller, Tobias; Meyer, M Cobas; Lenske, Alexander; Hauptmann, Marek; Majschak, Jens‐Peter

doi:10.1016/j.jmatprotec.2018.08.003

Cited by 6 publications

(5 citation statements)

References 7 publications

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“…1. The described method improved upon the work of Müller et al (2018) in a way that now allows for the evaluation of a broad range of geometries without the need to adjust or reprogram the wrinkle detection. The method was implemented in an autonomous module and is thus ready for industrial adaptation.…”

Section: Discussionmentioning

confidence: 99%

“…As proposed by Müller et al (2018), a template of an ideal wrinkle with changing grayscale values (GV(x)) was built symmetrically to the middle of the image on the X-axis (x0), according to Eq. 1, with the sharpness (sn) scaled to the size of the template itself.…”

Section: Wrinkle Detectionmentioning

confidence: 99%

“…Wrinkles in the wall section could not be detected. For detection of wrinkles in the wall section, alternative methods have been previously reported by Wallmeier et al (2015), Müller et al (2017), andMüller et al (2018).…”

Section: Invariance Of the Sample Geometry And Limitationsmentioning

confidence: 99%

“…The current study is a continuation of the previous work and attempted to comprehensively advance the basic method detailed by Müller et al (2018). Industry requirements for a fast inline evaluation of different geometries were addressed.…”

Section: Introductionmentioning

confidence: 99%

“…The setup of Wallmeier et al (2015) prohibited wrinkle detection on non-round geometries, and Leminen et al (2016) required predefined regions of interest (ROIs) on the sealing rim for evaluation to work. The method described by Müller et al (2018) was able to evaluate round and elliptical shapes, but it was limited to the observation of the wall section in two distinct ROIs.…”

Section: Introductionmentioning

confidence: 99%

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Geometry-invariant wrinkle detection in sealing rims of paperboard containers

Müller

Lenske

Barbier

et al. 2019

BioRes

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Noticeable improvements were achieved in the method for quality evaluation of formed paperboard containers. The method now allows for in situ evaluation of unavoidable wrinkle structures along the sealing rim of formed containers. An image of the sealing rim was provided. In this image, the contour of the sample was detected. The contour line was then offset to the inside of the sample, so that the new line was on the sealing rim, regardless of the original contour geometry. Along this offset contour line, the wrinkle structure was evaluated by using a previously described cross-correlation-based method. The repeatability and accuracy of the method were validated by comparing the detection results with the results from thorough human examiners. Furthermore, an approach to find the optimum settings for the wrinkle detection program is described and an outlook on implications for industrial adaptation of this method is given.

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Section: Discussionmentioning

confidence: 99%

Section: Wrinkle Detectionmentioning

confidence: 99%