ALGORITHM AND DEVICE FOR LICENSE PLATE NUMBER RECOGNITION BASED ON LINE DRAWING The present invention relates to image data processing, and in particular, to an algorithm and a device for number recognition. This algorithm is used for license plate number recognition. An algorithm and a device for license plate number recognition based on line drawing include the following steps: acquiring a license plate image; performing grayscale and binarization operations on the acquired license plate image; locating a license plate to obtain location data; dividing, based on the location data, each number into valid areas 1, 2, 3, and 4 from top to bottom in the second frame of image; setting contrast values for the four valid areas, counting the number of Is in each row of image data in area 1, area 2, area 3, and area 4, taking a maximum or minimum count value as an eigenvalue, and comparing the eigenvalue with the contrast value for the area to recognize a number. The present invention counts four rows of image data, with faster speed and higher accuracy. Compared with the method of selecting only one row of data, the present invention covers a larger range and is more reliable. Image processing module First D M Third Display Video acquisition FPGA module Preproce Algorithm Second. ssing - -- implementation module module AArea I Area 2 Area 3 ) Area 4


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    Title :

    Algorithm and Device for License Plate Number Recognition Based on Line Drawing


    Contributors:
    WANG PENG (author) / SONG JIAYU (author) / PENG YINGQUAN (author)

    Publication date :

    2020-10-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G06K Erkennen von Daten , RECOGNITION OF DATA / G06T Bilddatenverarbeitung oder Bilddatenerzeugung allgemein , IMAGE DATA PROCESSING OR GENERATION, IN GENERAL / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS




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