Evaluating colour print mottle
2007 (English)In: ADVANCES IN PRINTING AND MEDIA TECHNOLOGY: VOL XXXIII / [ed] Enlund, N.; Lovrecek, M., 2007, Vol. 33, 329-339 p.Conference paper (Refereed)
Among the most detrimental features of print quality are unintentional spatial reflectance variations in prints, frequently referred to as print mottle. The ability of the human visual system to discriminate between colours makes it sensitive not only to lightness variations, but also to chromatic variations. Previously, several models have been put forward to estimate the amount of lightness variations in prints, but few to measure chromatic variations. In this paper, a new evaluation model, based on a previous achromatic model but generalized to colour, is presented. Printed samples from two sets of simulated prints with various degrees of colour variations and two sets of colour prints from various conventional presses were analysed to evaluate the performance of the new model. The new model gave a result which correlated considerably better with visual evaluation than the achromatic model when the variation was chromatic in character. In practical printing situations, however, the variation does not seem to be mainly chromatic in character and a colour mottle evaluation model may therefore often be redundant.
Place, publisher, year, edition, pages
2007. Vol. 33, 329-339 p.
, ADVANCES IN PRINTING SCIENCE AND TECHNOLOGY, 33
Chromatic variation, colour print mottle, simulation, print quality, visual assessment
Computer and Information Science
IdentifiersURN: urn:nbn:se:kth:diva-25171ISI: 000267935100031ISBN: 978-953-7292-03-4OAI: oai:DiVA.org:kth-25171DiVA: diva2:356258
33rd International Research Conference of Iarigai/International-Association-of-Research-Organization-for-the-Information-Media-and-Graphic-Arts-Industries, Leipzig, GERMANY, SEP, 2006
QC 201010122010-10-122010-10-122010-10-12Bibliographically approved