The invention discloses an inland ship freeboard measurement method based on monocular vision. The method comprises the following steps: firstly, performing internal reference calibration on a monocular camera by using a checkerboard through a Zhang Zhengyou calibration method to obtain internal parameters of the camera; shooting a side view of the ship through a camera, and segmenting a part between a deck line and a waterline of the ship by using a Deeplabv3 + model according to the side view of the ship; detecting a deck line and a waterline of the ship so as to determine the position of the freeboard of the ship and calculate the pixel height of the freeboard of the ship; and realizing conversion from the pixel height to the actual height through the camera internal reference obtained through calibration, and calculating the true value of the ship freeboard. According to the method, the parameters of the camera are modeled, ship freeboard measurement is carried out without depending on a vanishing point and a vanishing line, and as the basis of ship overload detection, assistance is provided for water safe navigation of inland ships.

    本发明公开了一种基于单目视觉的内河船舶干舷测量方法。首先通过张正友标定法使用棋盘格对单目相机进行内参标定,获得相机的内部参数;通过相机拍摄船舶侧视图,根据船舶侧视图使用Deeplabv3+模型对船舶甲板线和吃水线之间部分进行分割;进而进行船舶甲板线和吃水线的检测,以此来确定船舶干舷位置,计算出船舶干舷像素高度;通过标定获得的相机内参实现像素高度到实际高度的转换,计算出船舶干舷真实值。本发明通过对相机自身参数进行建模,不依赖于消失点和消失线进行船舶干舷测量,作为船舶超载检测的基础,为内河船舶水上安全航行提供辅助。


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    Title :

    Inland ship freeboard automatic measurement method based on monocular vision


    Additional title:

    基于单目视觉的内河船舶干舷自动测量方法


    Contributors:
    CAO JIUWEN (author) / LIU HUAFENG (author) / LIU DEKANG (author) / CHEN JIAGUI (author)

    Publication date :

    2023-03-28


    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 / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / G06V



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    Nilsson, N.G. / Erbach | Engineering Index Backfile | 1931


    Freeboard and ship dimensions

    Nilsson, N.G. / Erbach | Engineering Index Backfile | 1930


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    Free access