The Norwegian Color Research Laboratory
The Norwegian Color Research Laboratory is a research group within the Faculty of Computer Science and Media Technology at Gjøvik University College. It was founded in spring 2001 to serve the rising needs for colour management solutions in the graphic arts industry.
Since its foundation the scope of interest has grown to cover colour science, colour imaging, and image processing in a broader sense, and our vision is to be one of the best research groups in this field. To achieve this vision the group employs a number of researchers with a broad competence basis in fields such as graphic arts, colour imaging science, electrical engineering, media technology, computer science, signal processing, physics, image processing. We also maintain an interactive open environment with strong national and international collaborators both in academia and industry. This has resulted in a wide range of fundamental and applied research projects which the group is actively involved in. Further, the group has a large number of well equipped laboratories and conference facilities.
Presentation on image quality at the Vigeland museum
Marius Pedersen from the Colorlab presented his PhD project on print quality and the image quality work carried out in the Colorlab at an open event at the Vigeland museum in Oslo on the 25th of April. The event was hosted by Océ Norway, and a part of their open house concept. The presentation was held in the setting of the new exhibition "Gustav Vigeland and photography", and in addition a presentation of the museum was held by curator Guri Skuggen.
Nussbaum presents at national color management conference
On the 18th of April Peter Nussbaum, from the Colorlab, gave a talk on ISO standards at a national color management conference. At the conference, held by IGM and NHO Grafisk, more than 130 participants attended. In addition to Peter Nussbaum several other experts on color management and PDF presented, such as the Ghent PDF Workgroup and Hanne Josefsen from Fargerommet. For more information visit the website of NHO Grafisk (in Norwegian).
Jon Yngve Hardeberg contributes to book on quality
Prof. Jon Yngve Hardeberg has contributed to a new book on quality. The book written in Norwegian, "Kvalitet i praksis - film, fjernsyn og foto", is focused on practical quality in film, television, and photography. The book can be bought online.
2 papers accepted for CGIV
Two papers from the Colorlab have been accepted to the 6th European Conference on Colour in Graphics, Imaging, and Vision. The conference takes place in the beginning of May 2012 in in Amsterdam, The Netherlands. The accepted papers are: "Computational color constancy using a stereo camera" by Raju Shrestha and Jon Yngve Hardeberg and "Spatio-temporal retinex-like envelope with total variation" by Gabriele Simone and Ivar Farup. Ivar Farup will also be session chair of the "image quality" track.
New article in Color Research & Application
Dibakar Pant and Ivar Farup have been accepted for publication in Color Research & Application with an article titled "Geodesic calculation of color difference formulas and comparison with the munsell color order system". The article is the second one published by the authors in Color Research & Application in just a few months. It is an extension of their previous work titled "Riemannian formulation and comparison of color difference formulas". The new article is available online.
Article published in Journal of Visual Communication and Image Representation
PhD student Gabriele Simone has published a journal paper in Journal of Visual Communication and Image Representation titled "Measuring perceptual contrast in digital images" together with Marius Pedersen and Jon Yngve Hardeberg. In the article the authors present a novel method to measure perceptual contrast in digital images, which is a multilevel approach. The proposed measure shows a high correlation with perceived contrast from human observers.The full article can be accessed online.
Dibakar Pant successfully defended his PhD thesis
Dibakar Pant successfully defended his PhD thesis on Friday the 17th of February. His thesis titled "Line Element and Variational Methods for Color Difference Metrics" has been conducted at The Norwegian Color Research Laboratory, Gjøvik University College (GUC), but he has been enrolled at the Doctoral School ED SIS 488, of the University Jean Monnet, Saint Etienne, France.
The Colorlab congratulates Dibakar with his PhD!
The Colorlab performs colour measurements at NTNU’s Daylight Laboratory
The Artificial Sky is an important element of Daylight Laboratory at the Department of Architectural Design, Form and Colour Studies, NTNU, Trondheim. It simulates a totally overcast sky, i.e. overcast enough to prevent perception of the sun and its halo. Among other tasks, the Artificial Sky can be used to perform psychophysical experiments for a number of different purposes. In a current experiment the influence of different window classes in house architecture and the corresponding human colour perception in the room have been investigated.
Aditya Sole and Peter Nussbaum from the Colorlab contributing to the project with conducting objective colour measurement. To determine the colour values colour measurements with the Minolta CS-1000 spectroradiometer of different NCS samples under different window class conditions have been taken.
Research papers presented at Electronic Imaging
Four research papers from the Colorlab were presented at the Electronic Imaging 2012 in San Francisco in the end of January. PhD student Raju Shrestha presented a part of his PhD work on computational color constancy using chromagenic filters in color filter arrays, while previous CIMET student Viktor Slavkovikj presented his master thesis work on characterizing the response of charge-couple device digital color cameras. In addition, a paper on a Retinex implementation based on a colony of agents by Gabriele Simone was presented, and Jon Hardeberg has co-authored a paper on subjective evaluations of example-based, total variation, and joint regularization for image processing.
Dibakar Raj Pant will defend his PhD thesis
Dibakar Raj Pant has submitted his academic thesis as part of the doctoral work at The Doctoral School ED SIS 488, of the University Jean Monnet, Saint Etienne, France. The thesis has been conducted at The Norwegian Color Research Laboratory, Gjøvik University College (GUC).
Title of the thesis: “Line Element and Variational Methods for Color Difference Metrics”
Public defense of the thesis: On Friday February 17th 2012 at 13.00 in Auditorium Eureka at Gjøvik University College. Dibakar Raj Pant defends his thesis for the degree of Doctor of Philosophy in Images, Vision and Signal.
Establishment of Norwegian membership in the ISO/TC 130 Graphic technology
Wednesday January 25th 2012 a Norwegian expert group held its first meeting at Standard Norway, which is the Norwegian member of ISO. Standard Norway is responsible for most standardisation areas. The Norwegian Color Research Laboratory together with representatives from the Norwegian Graphic Art Industry and Standard Norway will contribute internationally to the Committee ISO/TC 130 Graphic technology. The scope of ISO/TC 130 is the standardisation of terminology, test methods and specifications in the field of printing and graphic technology from the original provided to finished products. A Norwegian ISO/TC 130 membership means that ISO standards are not only implemented, but Norway has a national mirror committee participating in the development and establishment of new standards and revising of existing standards. The membership is a unique opportunity to bring the Norwegian printing industry into a future-oriented production!
CIMET consortium meeting
The Colorlab, Gjøvik University College hosted the CIMET consortium meeting 2012 held on 12-14th January. Co-ordinators, administrators and other representatives from all the four partner universities: University Jean Monnet (France), University of Eastern Finland, University of Granada (Spain) and Gjøvik University College (Norway) attended the meeting.
CIE technical committee work by the Colorlab
Ivar Farup from the Colorlab contributes to CIE's technical committee on "The Calculation of Colour Matching Functions as a Function of Age and Field Size" (TC1-82). The TC should recommend a procedure for calculating XYZ-like colour matching functions from cone fundamentals, as a function of age and field size. The work will be based on the new 2- og 10-degree standard that are under development by TC1-36. In addition a software to calculate the color matching functions will be developed. The TC is lead by Jan Henrik Wold, a former member of the Colorlab, and the committee consists of I. Farup, C. F. Andersen, M. Brill, M. Fairchild, H. Fairman,C. Lee, K. Richter, F. Viénot, M. Withouck, and Y. Yamauchi.
2 PhD positions in color imaging
The Colorlab invites applications for two 3-year full-time Early Stage Researcher (ESR) positions in the context of the EU-funded Marie Curie Initial Training Network project entitled Colour Printing 7.0: Next Generation Multi-Channel Printing (CP7.0). There is one position with the title Spectral modelling for multi-channel printers and displays and one with the title Design and development of spectral colour management workflows. For more information visit www.cp70.org or apply directly at http://hig.easycruit.com/vacancy/653439/42360?iso=no
New plotter
The Colorlab and Océ continue their good co-operation. Océ has given the Colorlab access to a high-tech large-scale plotter. Wednesday 7th of December three representatives from Océ visited the Colorlab to officially hand over the plotter. Henning Hagelund and Anton Strand from Océ Norway and Dirk Brouns, vice president for strategy planning at Océ’s headquarter in Venlo, the Netherlands were at Gjøvik University College this day.
PhD workshop hosted by the Norwegian Research School of Technology
On the 7. and 8. of December the Norwegian Research School of Technology arranged a PhD workshop at campus Grimstad at the University of Agder. Jon Y. Hardeberg, Raju Shrestha, and Steven Le Moan from the Colorlab attended the workshop, where the PhD students presented their work. Steven Le Moan says: "It allowed some of us to realize that, even though we don't belong to the same scientific communities, even though we don't always use the same words to describe our work, we share the same ideas and face the same challenges".
Paper published in the journal of the Society for Information Display
Jon Y. Hardeberg is a co-author on an article recently published in the journal of the Society for Information Display (SID). The article is written in collaboration with previous Colorlab member Jean-Baptiste Thomas (Université de Bourgogne) and Philippe Colantoni (Université Jean Monnet). The article presents a new model based on adaptive training data for high-end colorimetric display characterization.
Read more on the SID webpage or download a pre-print here.
