Image print quality
Friday the 13th of May Peter Nussbaum defended his doctoral thesis about colour measurement and evaluation of print quality.
Nussbaum defended the thesis at University in Oslo, Institute of Informatics. He is employed at the Norwegian Colour Research Laboratory at the Faculty of Computer Science and Media Technology at Gjøvik University College (GUC).
The full title of the thesis is “Colour Measurement and Print Quality Assessment in a Colour Managed Printing Workflow”. The purpose of this study is to develop methodologies and procedures for print quality assessment in a colour managed printing workflow. This is to guarantee a consequent and predictable print quality. -Often, printed matter, such as magazines and newspapers show variations in their print quality caused by a range of factors. The competitive situation in the graphic arts and printing industry is an invitation to develop methods and procedures to limit these variations in the printing process, Peter Nussbaum explains.
Nussbaum has collected relevant data gathered from visual observations using psychophysical experiments and quantitative measurement methods. An important part of the thesis is the examination of typical measurement devices used in the graphic arts and printing industry in terms of their accuracy and reproducibility. The performance of measurement instruments can severely affect the process control and finally the judgment of the print and proof quality. Hence, the inherent uncertainty of measurement instruments is investigated and the consequences discussed. Regarding the identified measurement variations between different colour measurement instruments, another method is proposed to reduce these variations in the whole graphical process.
To make the colour reproductions more predictable both on screen and on print, the thesis suggest that standardisation methods and procedures are used to a larger extend. These methods will give a more predictable and efficient colour production, Nussbaum concludes.
Peter Nussbaum has been under the supervision of Pr. Jon Yngve Hardeberg (Gjøvik University College) and Pr. Fritz Albregtsen (University of Oslo).