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    • 9. 发明公开
    • VERFAHREN ZUR BILDBASIERTEN VERÄNDERUNGSERKENNUNG
    • VERFAHREN ZUR BILDBASIERTENVERÄNDERUNGSERKENNUNG
    • EP2859531A1
    • 2015-04-15
    • EP12727816.6
    • 2012-06-06
    • Siemens Aktiengesellschaft
    • BIRCHBAUER, Josef AloisKLUCKNER, StefanWINDISCH, Claudia
    • G06T7/20
    • G01C11/00G06K9/00208G06T7/20G06T2200/04G06T2207/10024G06T2207/10028G06T2207/10032G06T2207/30181
    • The invention relates to a method for image-based alteration recognition for three-dimensional objects and/or surface sections. In this case, a three-dimensional model for an object is generated (2) from a plurality of photographs for a particular time, and a reference model or comparison model for the object is also provided. A visual focus on the three-dimensional model of the object is then defined and a 2.5D view of the object is derived (3) for this visual focus - in the form of a Cartesian data record. In this data record, at least besides two-dimensional coordinate values, a colour value derived from the three-dimensional model and a depth value derived from the three-dimensional model are also recorded (4) as data attributes for the respective data point. The respective data attributes of the respective data point are then compared (5) with the corresponding data from the reference model in order to establish discrepancies and/or changes. In this way, the method according to the invention very easily reduces complexity for recognition or ascertainment of alterations and/or differences between three-dimensional object photographs that are available in the form of what are known as point clouds. The data records, which comprise both geometric and colour information for the respective data points, allow very easy recognition of alterations in a three-dimensional object.
    • 本发明涉及一种用于三维物体和/或表面部分的基于图像的变更识别方法。 在这种情况下,从特定时间的多张照片中产生(2)对象的三维模型,并且还提供对象的参考模型或比较模型。 然后定义对象的三维模型的视觉焦点,并且以笛卡尔数据记录的形式导出(3)对于该视觉焦点的对象的2.5D视图。 在该数据记录中,至少除了二维坐标值之外,还记录从三维模型导出的颜色值和从三维模型导出的深度值(4)作为各个数据点的数据属性。 然后将相应数据点的相应数据属性与来自参考模型的相应数据进行比较(5),以建立差异和/或变化。 以这种方式,根据本发明的方法非常容易地降低了用于识别或确定以所谓的点云的形式可用的三维物体照片之间的变化和/或差异的复杂性。 包括各个数据点的几何和颜色信息的数据记录允许非常容易地识别三维对象中的变化。