| 摘要 |
Abstract The invention relates to a method and an apparatus for identifying motor vehicles for monitoring traffic. The object of permitting capture of features suitable for identification of a motor vehicle (13) with the least material-related outlay and motor-vehicle identification independently of the exact alignment of the apparatus is achieved according to the invention by the image-evaluation unit (BA) having means for determining the size ratios of a license-plate contour (21) in the perspectively distorted image (20) on the basis of stored standardized license-plate formats, means for determining the size of the perspective distortion of the license-plate contour (21) on the basis of the associated standardized license-plate format, means for establishing a calculation rule for the perspective rectification on the basis of the ascertained distortion of the license-plate contour (21) with respect to the associated license-plate format, and means for rectifying the extracted license plate-containing motor-vehicle view (14). - Figure 2 F056-11901-AU IBE BE Image recording BA Capturing of the license plate Ascertaining the captured Stored standardized license-plate format license plate fonnats Ascertaining the calculation rule for rectification. Determining an image region, extracting the image region Capturing contours in the image region Rectification according to calculation rule F Database Matching to database format ~ ~ ~ ~ 1 -- Reference B3V Similarity comparison images with reference images (categorized into classes) Match? No Yes ~ Fi g. 1 Output of a motor vehicle class, F 05 6-119 01-AU |
