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基于单视影像的地下通道3维重构方法 被引量:1
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作者 孙敏 胡争 《地理信息世界》 2008年第5期67-71,共5页
地下通道(包括隧道、巷道等)是一类重要的构筑物,重构其3维几何模型对于构建数字化操作平台有着重要的意义。在给定一个初始3维几何模型的条件下,利用地下通道影像上的线特征,通过人工交互方式获取相机的外方位元素及确定通道最终3维几... 地下通道(包括隧道、巷道等)是一类重要的构筑物,重构其3维几何模型对于构建数字化操作平台有着重要的意义。在给定一个初始3维几何模型的条件下,利用地下通道影像上的线特征,通过人工交互方式获取相机的外方位元素及确定通道最终3维几何模型的参数,然后利用单视几何原理,通过反投影像点坐标即可计算得到详细准确的地下通道3维模型。实验表明该方法简捷有效,可以在实践中加以推广。 展开更多
关键词 地下通道 隧道 3维重构 单影像重构
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Analysis of Object Depth Effects on Accuracy of Dimensional Shape in X and Y Directions Using Single Non-metric Image
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作者 Tarek M.A. ZHU Qing 《Geo-Spatial Information Science》 2007年第4期269-275,共7页
In general, to reconstruct the accurate shape of buildings, we need at least one stereomodel (two photographs) for each building. In most cases, however, only a single non-metric photograph is available, which is us... In general, to reconstruct the accurate shape of buildings, we need at least one stereomodel (two photographs) for each building. In most cases, however, only a single non-metric photograph is available, which is usually obtained either by an amateur, such as a tourist, or from a newspaper or a post card. To evaluate the validity of 3D reconstruction from a single non-metric image, this study analyzes the effects of object depth on the accuracy of dimensional shape in X and Y directions using a single non-metric image by means of simulation technique, as this was considered to be, in most cases, a main source of data acquisition in recording and documenting buildings. 展开更多
关键词 SINGLE non-metric image reconstruction object depth ACCURACY dimensional shape
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