Pattern recognition based on correlograms : A case study in Europos (N. Greece)
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Abstract:
The results of the geophysical exploration in one of the cemeteries in the site of ancient Europos (N. Greece) are presented. Several tombs were revealed by the preliminary interpretation of the data during the period in which the field crew was still working in the site. The subsequent excavation verified the geophysical detections. The electrical resistance maps were cross-correlated with signals produced by various structures. The aim was twofold : firstly to remove noise components, and, secondly to point out locations that conceal of structures similar to the one which produced the specific signal in each run of cross-correlation. Correlograms can be seen as band pass filtered versions of the respective maps and their high values as locations where the signal recognizes itself to a certain degree. Indeed, we normalized the correlograms with respect to the maximum value (zero shift) of the autocorrelation function of the signal. Finally, the implication of varying burial depth of the targets is discussed.Keywords:
SIGNAL (programming language)
Degree (music)
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