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    VERFAHREN UND VORRICHTUNG ZUR EXTRAKTION VON KONTUREN AUS SONARBILDERN
    3.
    发明公开
    VERFAHREN UND VORRICHTUNG ZUR EXTRAKTION VON KONTUREN AUS SONARBILDERN 有权
    方法和设备提取声纳图像轮廓

    公开(公告)号：EP2758799A1

    公开(公告)日：2014-07-30

    申请号：EP12773238.6

    申请日：2012-09-12

    申请人： ATLAS ELEKTRONIK GmbH

    发明人： LEHMANN, Benjamin ,  SIANTIDIS, Konstantinos ,  KRAUS, Dieter

    IPC分类号： G01S15/88

    CPC分类号： G06T7/12 ,  G01S15/8904 ,  G06T7/194 ,  G06T2207/20032 ,  G06T2207/20161

    摘要： The invention relates to a method and a device for extracting contours from sonar images
    u
    0
    using the level-set-function
    ϕ
    n
    (x,y) both for areas in the sonar image designated as highlight and areas designated as shadow. While the highlight develops by means of iteration of the level-set-function for the highlight according to the equation
    ϕ
    n+1
    (x,y) =
    ϕ
    n
    (x,y) + Δt ⋅ (K
    (x,y) - d
    i
    (x,y) + d
    o
    (x,y) ), the level-set-function for the shadow iterates according to the equation
    ϕ
    n+1
    (x,y) =
    ϕ
    n
    (x,y) + Δt ⋅ (K
    (x,y) - f
    s - d
    i
    (x,y) + d
    o
    (x,y) )
    . The two equations differ by the term, formula (I), which decreases with the number of iteration steps
    t and causes shadow contours to be elaborated during the following iteration steps.

    VERFAHREN ZUM DETEKTIEREN EINER UNTERWASSERSTRUKTUR SOWIE RECHNER UND WASSERFAHRZEUG
    4.
    发明公开
    VERFAHREN ZUM DETEKTIEREN EINER UNTERWASSERSTRUKTUR SOWIE RECHNER UND WASSERFAHRZEUG 有权

    公开(公告)号：EP2973398A1

    公开(公告)日：2016-01-20

    申请号：EP14714578.3

    申请日：2014-02-14

    申请人： ATLAS ELEKTRONIK GmbH

    发明人： KRAUS, Dieter ,  LEHMANN, Benjamin

    IPC分类号： G06T7/00

    CPC分类号： G06T7/12 ,  G06T7/143 ,  G06T7/194 ,  G06T2207/10028 ,  G06T2207/30184

    摘要： The invention relates to a method for detecting an underwater structure from a sonar image with sonar image pixels, wherein the method involves the following steps: (a) assigning the individual sonar image pixels to a background image or to an evaluation image, wherein the evaluation image has assigned evaluation pixels; (b) selecting individual evaluation pixels such that support points are present; (c) adjusting a mathematical fit function to the support points, wherein the fit function has a fit function length on the basis of the support points; (d) determining a fit function band using the fit function length and a fit function band width, wherein a width value of the fit function band width is shorter than a length value of the fit function length; (e) determining a number of evaluation pixels, which lie within the fit function band; and (f) performing an evaluation on the basis of the determined number of evaluation pixels.

    摘要翻译： 本发明涉及一种用声纳图像像素从声纳图像中检测水下结构的方法，其中该方法包括以下步骤：（a）将单个声纳图像像素分配给背景图像或评估图像，其中评估 图像已分配评估像素; （b）选择个体评估像素，使得存在支持点; （c）对所述支撑点调整数学拟合函数，其中所述拟合函数基于所述支撑点具有适合的功能长度; （d）使用拟合函数长度和拟合函数带宽确定拟合函数带，其中拟合函数带宽的宽度值短于拟合函数长度的长度值; （e）确定位于所述拟合功能带内的评估像素的数量; 和（f）基于所确定的评估像素的数量执行评估。