Ινστιτούτο Πολιτιστικής και Εκπαιδευτικής...
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DATA ACQUISITION, PROCESSING, AND IMAGE ENHANCEMENTIn the last two decades, geophysicists working in archaeological applications have introduced many innovations to speed up data acquisition and the presentation/interpretation of the data. Many of these innovations have simply been applied to archaeology as the technology became available in other fields. The most important developments in the field equipment include automated microprocessor controlled field data and coordinate acquisition systems (Weymouth and Huggins, 1985). Other innovations, such as streamlined field procedures and customized instrumentation, demonstrate the blossoming of human genius when faced with a tedious and time-consuming task.Linington (1970b) reported initial efforts to develop filtering procedures for archaeogeophysical data. The desire to extract every useful piece of information from field data has preoccupied geophysicists working in archaeological applications ever since. One of the more significant breakthroughs in the last decade has been the introduction of image processing display and filtering technology. These technologies derive mainly from electrical engineering and remote sensing (geophysicists meaning of the word) research. Skilled interpreters often miss subtle information existing in the data when it is presented in the form of contoured maps. Filtering methods and image-enhancing algorithms of remarkable sophistication are now commonly applied to archaeological geophysical data, which are then displayed in the form of an image rather than a contour map. This usually enhances subtle linear features otherwise lost in the presence of strong anomalies of geologic origin (Scollar et al., 1986).In the Federal Republic of Germany and elsewhere in Europe, image enhancement methods are routinely applied by archaeologists to generate land utilization maps (Scollar et al., 1986). These maps show potential human occupation sites that are ubiquitous on the continent. The sites are not usually apparent to an archaeologist from surface examination of a site, however. Maps of this sort are now used to decide whether or not a new land development will be allowed to proceed. There are political consequences when large development projects are held up by the process of archaeological certification, of course. This has led to significant governmental financial support for the development of fast, efficient methods of data acquisition and image presentation (Scollar et al., 1986). , , ( , - ) ! . .