MOTTLING - Measuring Unevenness of Solid Printed Areas

"Work driers in more thorough. Try another paper."
Unisource: Paper trouble chart for offset pressmen/Mottling

Unevenness of printing


This project is a sub-project of larger industrial research project Papvision. The goal of this sub-project is to review and revise existing, and develop new methods for an automatic analysis of mottling, i.e., the unevenness of a solid printed area The main goal is to propose new hardware and software solutions to determine the mottling index of a sample within the industrial requirements for accuracy and reliability.



First results of new methods have been published in scientific conferences. The proposed methods outperform the existing ones.

Contact information

Lappeenranta University of Technology
Albert Sadovnikov E-mail WWW Graduate researcher
Lasse Lensu E-mail WWW Project manager, post-doc researcher
Joni Kämäräinen E-mail WWW Post-doc researcher
Heikki Kälviäinen E-mail WWW Director, professor
Pasi Saarinen E-mail WWW Industry coordinator
Petja Salmela E-mail WWW Undergraduate researcher


Source code

  1. Not publicly available

Data sets

  1. Not publicly available

Links to other resources


Do not hesitate to to contact authors (e-mail, etc.) in order to retrieve copies or reprints of the following publications.

  1. Articles in international scientific journals with referee practice
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  2. Articles in international compilation works and in international scientific conference proceedings with referee practice
    1. Sadonikov, A., Salmela, P., Lensu, L., Kamarainen, J.-K., Kälviäinen, H., Mottling Assessment of Solid Printed Areas and Its Correlation to Perceived Uniformity, In Proc. of the 14th Scandinavian Conf. of Image Processing (Joensuu, Finland, 2005), pp. 411-418.

    2. Sadonikov, A., Lensu, L., Kamarainen, J.-K., Kälviäinen, H., Quantified and Perceived Unevenness of Solid Printed Areas, In In Proc. of the 10th Iberoamerican Congress on Pattern Recognition (Havana, Cuba, 2005), pp. 710-719.

  3. Scientific monographs
    1. Salmela, Petja, Offset-painojäljen laikkuisuuden mittaus konenäkömenetelmillä, MSc (Diploma) thesis, Lappeenranta University of Technology, 2003. (PDF 2.2M)

  4. Other scientific publications
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