Method for automatic recognition of traffic signs, and device for carrying out the method.

摘要

The method involves displaying an input image of the panel to be recognised (22) and the reference panel images (20,21). A laser beam (F,F1) is passed through the screen and a first lens (L3) focuses it on a modulator (8) designed to record an intensity spectrum. The beam is passed through a second lens (L4) to obtain another spectrum for a detection system. From the spectrum it is determined if there is correspondence between the panel to be recognised and one of the reference panels, by detecting in the focal plane of the second lens, the correlation peaks of the different panels contained in the input image. The presence of peaks (31) of intensity greater than a given step level and shifted with respect to the optical centre of the image indicates that there is a correspondence between the panel to be recognised and the reference panels. Parts of the beam corresponding to the peaks are polarised differently (10) to the other peaks. The different parts of the beam are separated by the polarisation, and the different parts are sent to different detectors (11,12). <IMAGE>