The invention belongs to the field of image analysis, particularly relates to a method and system for automatically measuring aircraft skin cracks, and aims to solve the problems that an existing aircraft skin crack detection method is large in subjectivity and prone to errors. The method comprises the following steps: acquiring a binary image of the aircraft skin crack, respectively performing distance transformation and morphological skeleton detection on the binary image to obtain a distance transformation picture and a skeleton picture, and integrating the distance transformation picture and the skeleton picture to obtain a skeleton distance map of the aircraft skin crack; searching branch points, end points and connection points of the skeleton distance graph, and establishing an edge matrix E of a connection relationship between the branch points and the end points as graph structure features; and on the basis of the graph structure features and the distance transformation pictures, calculating enclosing rectangle attributes and crack attributes, and then evaluating features and measurement results of the aircraft skin cracks.

    本发明属于图像分析领域,具体涉及一种飞机蒙皮裂缝自动测量的方法及系统,旨在解决现有的飞机蒙皮裂纹检测方法主观性大,容易出现误差的问题。本发明包括:采集飞机蒙皮裂缝二值化图像,对所述二值化图像分别进行距离变换和形态学骨架检测,获得距离变换图片和骨架图片,将距离变换图片和骨架图片整合获得飞机蒙皮裂缝的骨架距离图;搜索骨架距离图的分支点、端点和连接点,建立分支点与端点的连接关系的边矩阵E作为图结构特征;基于所述图结构特征和距离变换图片,通过计算外接矩形属性和裂缝属性,进而评价飞机蒙皮裂缝的特征和测量结果。


    Access

    Download


    Export, share and cite



    Title :

    Method and system for automatically measuring aircraft skin crack


    Additional title:

    一种飞机蒙皮裂缝自动测量的方法及系统


    Contributors:
    HUANG YAN (author) / ZHANG SHUYU (author) / QU LIANGWU (author) / ZHANG YIJUN (author) / SUN ZOUTAO (author) / HOU JINYI (author) / ZHANG BOXI (author) / ZHAO YAO (author)

    Publication date :

    2023-12-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G06T Bilddatenverarbeitung oder Bilddatenerzeugung allgemein , IMAGE DATA PROCESSING OR GENERATION, IN GENERAL / B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen / G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES



    Aircraft wing skin crack cutting device

    MI BAOQI / LIN ZHONGSONG / TIAN BAOLE et al. | European Patent Office | 2023

    Free access

    Skin Friction Measuring Device for Aircraft

    L. C. Montoya / D. R. Bellman | NTIS | 1979


    Skin friction measuring device for aircraft

    Montoya, L. C. / Bellman, D. R. | NTRS | 1980


    Skin Friction Measuring Device for Aircraft

    L. C. Montoya / D. R. Bellman | NTIS | 1979


    Landing aircraft automatically

    Hart, S.I. | Tema Archive | 1974