Method and device for hit evaluation on targets

摘要

The subject matter of the invention is a method and a device for hit evaluation on targets, in the case of which a target (4) is passed through an electrooptical system which contains a light source and an optical receiver (13, 14). Marked points on the illuminated target, in particular the bull's eye which is dark or coloured, and a hole from a shot are detected by the receiver either by their distribution or by a raster scan and are decomposed into sample points (pixels). The centroids of the bull's eye and of the shot hole are calculated in a subsequent computation operation by arithmetic averaging of the coordinates of the detected sample points and the distance, which is determined computationally in this way, between the two centre points is indicated and/or documented on the target. In the electrooptical system, the target (4), which is illuminated only by incident light from the light source (20) which is designed in elongated form, is transported on a reflective and contrast-forming base (6), and the dark or coloured bull's eye and the shot hole are scanned (sampled) in a single continuous illumination and passage process, on the basis of the different contrasts of the area regions. <IMAGE>