Mottling Assessment of Solid Printed Areas and Its Correlation to Perceived Uniformity

  • Albert Sadovnikov
  • Petja Salmela
  • Lasse Lensu
  • Joni-Kristian Kamarainen
  • Heikki Kälviäinen
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3540)


Mottling is one of the most important printing defects in modern offset printing using coated papers. Mottling can be defined as undesired unevenness in perceived print density. In our research, we have implemented three methods to evaluate print mottle: the standard method, the cluster-based method, and the bandpass method. Our goal was to study the methods presented in literature, and modify them by taking relevant characteristics of the human visual system into account. For comparisons, we used a test set of 20 grey mottle samples which were assessed by both humans and the modified methods. The results show that when assessing low-contrast unevenness of print, humans have diverse opinions about quality, and none of the methods accurately capture the characteristics of human vision.


Machine Vision Human Visual System Printing Process Weber Fraction Human Evaluation 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Albert Sadovnikov
    • 1
  • Petja Salmela
    • 1
  • Lasse Lensu
    • 1
  • Joni-Kristian Kamarainen
    • 1
  • Heikki Kälviäinen
    • 1
  1. 1.Laboratory of Information Processing, Department of Information TechnologyLappeenranta University of TechnologyLappeenrantaFinland

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