Two-dimensional multi-spectral digitization and
three-dimensional modelling of easel paintings
Christian
Lahanier*,
Geneviève Aitken and Ruven Pillay
Centre de
recherche et de restauration des musées de France
Palais du
Louvre
Abstract
This paper presents the usefulness and utility of three complementary
digitization techniques for the dynamic rendering of colour, roughness and
shape of easel paintings. Twodimensional
multi-spectral digitization and three-dimensional (3D) modelling of paintings are used for colour
accuracy rendering and measurement, colour characterization, pigment
identification, for high-definition visualization of the painting, and for the
measurement of the shape of the support and the paint-layer roughness.
The
experimentation was performed on several paintings. The results show the
advantages of each technique.
Several viewers were developed to handle multi-spectral images and 3D
models.
ICOM LA HAYE DEN HAAGEN - 2005
Spectral imaging of Leonardo Da Vinci’s Mona Lisa:
An authentic smile at 1523 dpi with additional
infrared data
P.Cotte, D.Dupraz
Archiving 2006 Ottawa, Canada
Abstract
Two photos of
the famous Mona Lisa were taken in October 2004 to contribute towards improving the
technical and scientific data of the masterpiece before moving it in April
2005. The capabilities of the multispectral system developed by the LUMIERE TECHNOLOGY Company within the
scope of the European CRISATEL project have made it possible to achieve optimal
spatial resolution on the masterpiece, the highest level of sharpness ever
achieved in the field of infrared reflectography, and a level of accuracy
regarding color information which cannot be achieved with traditional
technologies. From ultraviolet to infrared, all the details enhance the
intimacy of this masterpiece. The scientific utilization of this data will
undoubtedly be a major breakthrough to achieve better knowledge of Leonard De
Vinci’s work. The remarkable nature of this masterpiece and its specific
physical features have required appropriate parameterizations and preliminary
tests which are described in this publication.
Download Pascal Cotte Conference at Archiving 2006 doc.PDF, 10,6 Mb
Spectral imaging of Leonardo Da Vinci’s Mona Lisa: A true color smile without the influence of aged varnish
P.Cotte, D.Dupraz
CGIV 2006 London, UK
AbstracT
Two photos of the famous Mona Lisa were taken in October 2004
to contribute towards improving the technical and scientific data of the
masterpiece before moving it in April 2005.
The capabilities of the
multispectral system developed by the LUMIERE TECHNOLOGY Company within the
scope of the European CRISATEL project have made it possible to achieve optimal
spatial resolution on the masterpiece, the highest level of sharpness ever
achieved in the field of infrared reflectography, and a level of accuracy
regarding color information which cannot be achieved with traditional
technologies. Based on this new data, we suggest in this publication that the
influence of aged varnish be removed, the significant discoloration of which
alters the readability of the masterpiece
Download Pascal Cotte Poster JPEG
BIRTH OF A NEW ERA FOR HIGH FIDELITY REPRODUCTION USING MULTISPECTRAL IMAGE ACQUISITION
Pascal COTTE,
Paris France October 2003
Multispectral Analysis and Spectral Reflectance Reconstruction of Art Paintings
Alejandro Ribés Cortés
Ph.D. Thesis
A dissertation submitted in partial fulfillment of the degree of “Docteur de l’Ecole Nationale Supérieure des Télécommunications“
Defended on 16 december 2003, Paris, France
Chapter 6. The CRISATEL Acquisition System.
A high-resolution multispectral color imaging system has been developed for the European
project CRISATEL. This system includes a multispectral camera and a dedicated high power
lighting system, both developed by LUMIERE TECHNOLOGY, Paris, France. In this chapter
we present and characterize the hardware of the CRISATEL camera. Afterwards, we evaluate
this acquisition system and using the data obtained on the evaluation we propose and
implement a calibration procedure. Finally, a correction system for the calibrated images is
described.
This is an experimental chapter where an actual multispectral acquisition system is studied.
We have designed and implemented software intimately related to the acquisition system: the
calibration and correction systems. These systems aim to acquire images that have not only
high visual quality but also a radiometrically controlled signal.
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