The purpose of this paper is to suggest a new procedure for reconstructing the transverse profile of rails in operation by meansudof image-processing technique. This methodological approach is based on the “information” contained in high-resolutionudphotographic images of tracks and on specific algorithms which allow to obtain the exact geometric profile of the rails andudtherefore to measure the state of the rail-head extrados wear. The analyses and the results concern rails taken from railwayudlines under upgrading by means of mono- and stereoscopic methods which are appropriate to be employed in laboratoryudapplications or in high-efficiency surveys in situ.
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