| Popis: |
The services of the State and of the City of Bayeux have joined forces with the University of Caen-Normandy and with the CNRS in order to design and develop a digital tool for the study and interpretation of the so-called Bayeux Tapestry, an eleventh-century medieval embroidery which is listed in France as a historic monument. This project involves a spatialised documentary information system inspired by a classic geographical information system but adapted to the scale of the embroidery. This tool will allow for the management of documentary and scientific information about the work, geo-referenced to a high definition representation of the tapestry. The realisation of the project involves finding answers to a number of questions such as the production of images for the tool, obtained from a series of digital photographs. Building up a panorama in this way is not an innovation in the field of image treatment and analysis. But the Bayeux tapestry presents certain specific constraints, such as its non-rigid backing and the mere size of the piece, 70 metres long. This means a total image of 480,000 x 6,000 pixels, making existing algorithms obsolete. In direct contact with the University teams involved, the GREYC has developed an approach based on matching up the SIFT interest points and a fusion algorithm based on a model of elastic geometrical deformation, in order to respect the structure of the tapestry. This approach allows for the high quality of the images to be preserved, without any limit to their number or type, and today facilitates access to this major work. |
