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Jon Y. Hardeberg - Spectral imaging of fine art paintings

Talare: Prof. Jon Y. Hardeberg, Gjøvik University College, Norway
Tid: Onsdag 13/11, 15:15 – 16:15
Plats:  VR-arenan, Kopparhammaren

Abstract:

Hyperspectral imaging of fine art paintings has opened up new possibilities for their analysis, visualisation, conservation, and documentation, and allows to investigate the paintings scientifically in a more precise way than other existing imaging and measurement techniques. In this talk we first give a review of the use of imaging technology for cultural heritage applications. We then focus on our recent hyperspectral image acquisition and analysis of the painting "The Scream" painted in 1893 by Edvard Munch. This work has been done in collaboration with researchers from the National Museum of Art, Architecture and Design (Oslo, Norway) and Norsk Elektro Optikk AS (Lørenskog, Norway).

The spectral reflectance has been recorded using the hyperspectral imaging systems HySpex VNIR-1600 and HySpex SWIR-320m-e. The VNIR-1600 camera generates 160 spectral bands in the visible and near infrared (VNIR) region of 400 to 1000 nm with a spatial resolution on the painting of ~0.2 mm (for the whole painting) and 0.06 mm (for a subset). The SWIR-320m-e camera produces 256 bands in the shortwave infrared (SWIR) region of 1000 to 2500 nm with a spatial resolution of 0.29 mm for the whole painting. An accurately controlled translator stage moves the camera and illumination sources to cover the entire painting surface
of size 91 x 73.5 cm. The image spectrum has been analysed during the acquisition and the camera parameters has been optimised for signal-to-noise ratio. Lighting levels have been controlled and polarising filters were employed to avoid specular reflections from the painting surface. We have simultaneously captured a calibrated grey reflectance reference and Macbeth Colorchecker as reference data for normalization and conversion to spectral reflectance.

After having explained the setup and calibration we move on to presenting our approaches to visualizing and analysing the data, including extracting hidden information using Independent Component Analysis and identifying the used pigments using Spectral Correlation Mapper. Conclusions are drawn and directions for further research are discussed.

Biography

Jon Y. Hardeberg received his sivilingeniør (MSc) degree in signal processing from the Norwegian Institute of Technology in Trondheim, Norway in 1995, and his PhD from Ecole Nationale Supérieure des Télécommunications in Paris, France in 1999. After a short but extremely valuable industry career near Seattle, Washington, where he designed, implemented, and evaluated colour imaging system solutions for multifunction peripherals and other imaging devices and systems, he joined Gjøvik University College (GUC,http://www.hig.no) in Gjøvik, Norway, in 2001.

He is currently Professor of Colour Imaging at GUC's Faculty of Computer Science and Media Technology, and member of the Norwegian Colour and Visual Computing Laboratory (http://www.colourlab.no), where he teaches, supervises MSc and PhD students, and researches in the field of colour imaging. His current research interests include multispectral colour imaging, print and image quality, colorimetric device characterisation, colour management, and cultural heritage imaging, and he has co-authored more than 150 publications within the field.


His professional memberships include IS&T (Society for Imaging Science and Technology), SPIE (the international society for optics and photonics), and ISCC (The Inter-Society Color Council). He is GUC's representative in iarigai (The International Association of Research Organizations for the Information, Media and Graphic Arts industries), and the Norwegian delegate to Division 8 of the CIE (International Commission on Illumination).

He is currently project co-ordinator for an EU project (Marie Curie ITN CP7.0,http://www.cp70.org), project leader for a large research project funded by the Research Council of Norway (HyPerCept), GUC’s representative in the management committee of the Erasmus Mundus Master Course CIMET (Colour in Informatics and Media Technology, http://www.master-erasmusmundus-color.eu/), and Norway’s Management Committee member in the COST Action COSCH (Colour and Space in Cultural Heritage,http://cosch.info). He is co-founder and chair of Forum Farge (http://www.forumfarge.no), Norway's new interdisciplinary colour association.


Wed Nov 13 12:36:00 CET 2013




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Senast uppdaterad: Fri Oct 18 12:47:15 CEST 2013