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The main goal of the present work is to determine the hand that has written two newly discovered documents in Romania. For giving the proper answer, the authors introduced the notion of "Ideal Representative", namely of an object that very well represents the corresponding ideal alphabet symbol that a writer had in his/her mind when writing a document by hand. Moreover, the authors have introduced a novel method, which leads to the optimal evaluation of the Ideal Representative of any alphabet symbol in association with any handwritten document. Furthermore, the authors have introduced methods for comparing these Ideal Representatives, so as a final decision about the hand that has written a document may be obtained with a highly considerable likelihood. The related analysis manifests that the two documents discovered in Romania in 1998, belong to the great personality of Rigas Feraios. The presented method of automatic handwriting Identification seems to be of general applicability. [ABSTRACT FROM AUTHOR]

In this article, we examine the reconstruction of seventeenth century BC fragmented wall paintings, excavated at Akrotiri, Santorini, Greece. We use a previously presented algorithm for obtaining potential fragment matches based on the shape of the fragments. We then extract additional information from the fragments' images in order to drastically reduce the number of potential matches proposed by this system. In particular, we examine the performance of several criteria that make use of the chromatic (color) content of the fragments' images near the edge of the piece. We also extract additional information regarding the thematic content of the fragments; this information is then used to establish an additional criterion, which pertains to the continuity of the thematic content across the segments of the fragments' edge border that have been found to match with regard to shape. We first apply these criteria on the reconstruction of a commercial jigsaw puzzle in order to evaluate their performance. We then proceed to apply the criteria on several images of the Santorini fragments. For reasons of comparison, we also apply the color matching algorithms introduced by other researchers. Results show that in the presence of color deterioration and noise introduced by the passage of time and the fragmentation process, the combination of the information extracted from both the chromatic and the thematic content of the fragment images yields clearly superior results by those obtained from the use of chromatic information alone. [ABSTRACT FROM AUTHOR]

In this paper two new theorems are proved in association with the problem of matching three dimensional solid bodies. Rigorous mathematical criteria are given in order to test if two such bodies actually match in a certain position. Since this problem finds important application to the actual problem of reassembling fragmented objects e.g. archaeological, special care is taken to account for small gaps between matching fragments and fuzziness of the matching parameters. [ABSTRACT FROM AUTHOR]