Proceedings of the 17th International Conference on Pattern Recognition, 2004. ICPR 2004., 2004
The paper addresses the segmentation of fragments from the background using a clustering approach... more The paper addresses the segmentation of fragments from the background using a clustering approach in the color space. The problem is involved in the on-going development of a digital system for the virtual aided recomposition of fragmented frescos, an innovative approach currently being proved on the S. Matthew's fresco, made by Cimabue for the Upper Church of S. Francis in Assisi and broken, during the earthquake in 1997, into more than 140,000 pieces. The developed technique has been used to build the fragments' database. The segmentation process is based on the fast global k-means algorithm. Experiments show that separation of foreground and background on a so large number of images is much more manageable and effective using prototypes built by the clustering algorithm.
The paper describes the colour correction approach of a system for the virtual aided recompositio... more The paper describes the colour correction approach of a system for the virtual aided recomposition of fragmented frescos, being developed and proved for the reconstruction of the S. Matthew's fresco, painted at the end of the 13th century by Cimabue for the Upper Church of S. Francis in Assisi and broken in more than 140.000 fragments during the earthquake of 1997. One of its key features is the selection of fragments by a query-by-example approach applied to sample images (fragments and/or details extracted from the whole image of the fresco). Unfortunately the only available picture of the whole fresco has been acquired without any colour reference and is chromatically different across its extension and with respect to fragments: its comparison with them requires specific colour transformations to be applied to each of its regions. Two different methods to identify colour correspondences between fresco and fragments (manually and automatically from the already placed fragments...
Proceedings of the 17th International Conference on Pattern Recognition, 2004. ICPR 2004., 2004
The paper addresses the segmentation of fragments from the background using a clustering approach... more The paper addresses the segmentation of fragments from the background using a clustering approach in the color space. The problem is involved in the on-going development of a digital system for the virtual aided recomposition of fragmented frescos, an innovative approach currently being proved on the S. Matthew's fresco, made by Cimabue for the Upper Church of S. Francis in Assisi and broken, during the earthquake in 1997, into more than 140,000 pieces. The developed technique has been used to build the fragments' database. The segmentation process is based on the fast global k-means algorithm. Experiments show that separation of foreground and background on a so large number of images is much more manageable and effective using prototypes built by the clustering algorithm.
The paper describes the colour correction approach of a system for the virtual aided recompositio... more The paper describes the colour correction approach of a system for the virtual aided recomposition of fragmented frescos, being developed and proved for the reconstruction of the S. Matthew's fresco, painted at the end of the 13th century by Cimabue for the Upper Church of S. Francis in Assisi and broken in more than 140.000 fragments during the earthquake of 1997. One of its key features is the selection of fragments by a query-by-example approach applied to sample images (fragments and/or details extracted from the whole image of the fresco). Unfortunately the only available picture of the whole fresco has been acquired without any colour reference and is chromatically different across its extension and with respect to fragments: its comparison with them requires specific colour transformations to be applied to each of its regions. Two different methods to identify colour correspondences between fresco and fragments (manually and automatically from the already placed fragments...
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Papers by G. Carlomagno