A vison-based landing system comprises a processor onboard an aerial vehicle, an onboard vision sensor, onboard aiding sensors, and a data storage unit. The processor hosts an adaptive feature extraction module operative to perform a method that comprises capturing an image of a landing area having a plurality of edge features; calculating an estimated slope of an expected edge feature; calculating an expected gradient direction of the expected edge feature; selecting a horizontal basis kernel for the expected edge feature along an expected horizontal gradient; selecting a vertical basis kernel for the expected edge feature along an expected vertical gradient; calculating a combined convolution kernel for the expected edge feature based on the horizontal and vertical basis kernels, the estimated slope, and the expected gradient direction; and performing a convolution operation on the image using the combined convolution kernel to obtain an edge feature image of the landing area.


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    Title :

    ADAPTIVE FEATURE EXTRACTION TO DETECT LETTERS AND EDGES ON VEHICLE LANDING SURFACES


    Additional title:

    ADAPTIVE MERKMALSEXTRAKTION ZUR ERKENNUNG VON BUCHSTABEN UND KANTEN AUF FAHRZEUGLANDEFLÄCHEN
    EXTRACTION DE CARACTÉRISTIQUES ADAPTATIVE POUR DÉTECTER DES LETTRES ET DES CONTOURS SUR DES SURFACES D'ATTERRISSAGE DE VÉHICULE


    Contributors:
    GUPTA NIKHIL (author) / DAS SHOUVIK (author)

    Publication date :

    2023-09-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G06V / G05D SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES , Systeme zum Steuern oder Regeln nichtelektrischer veränderlicher Größen / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS



    ADAPTIVE FEATURE EXTRACTION TO DETECT LETTERS AND EDGES ON VEHICLE LANDING SURFACES

    GUPTA NIKHIL / DAS SHOUVIK | European Patent Office | 2023

    Free access


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    Holnicki-Szuic, J. / Mikulowski, G. / Pawlowski, P. et al. | British Library Conference Proceedings | 2006