(Received 27 June 1983; accepted 26 July 1983)
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The intricate line pattern of epidermal ridges in a fingerprint can be transformed into a characteristic interferogram of the moiré type by superimposing a centrosymmetric reference pattern. The interferogram is then dissected automatically into an array of cells whose optical densities are translated into a sequence of binary digits. By this procedure, fingerprints are easily read, filed, and transmitted as well as analyzed, identified, and matched by microcomputers.
Professor, Université de Sherbrooke, Sherbrooke, Québec
Professor, Unité de recherche en biophysique appliquée, Département de biophysique, Faculté de médecine, Université de Sherbrooke, Sherbrooke, Québec
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