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室内3D点云模型的门窗检测 被引量:6
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作者 沈乐 李桂清 +2 位作者 冼楚华 江洋 熊赟晖 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 2019年第9期1494-1501,共8页
为了检测室内3D场景中的门窗信息,提出一种3D-2D-3D的门窗检测算法.首先在3D室内场景点云模型中多角度旋转拍照,获取点云的2D图像;然后对2D图像进行门窗目标的粗检测,得到门窗在图像中的大致范围,并将此2D信息返回到3D点云数据中,得到... 为了检测室内3D场景中的门窗信息,提出一种3D-2D-3D的门窗检测算法.首先在3D室内场景点云模型中多角度旋转拍照,获取点云的2D图像;然后对2D图像进行门窗目标的粗检测,得到门窗在图像中的大致范围,并将此2D信息返回到3D点云数据中,得到包含门窗的局部点云数据;最后提取局部点云数据的轮廓线及其交点,通过优化得到门窗特征角点的位置信息.实验结果表明,采用这种“整体-局部”策略的算法能有效地检测出3D室内场景中门窗的位置信息. 展开更多
关键词 室内场景 点云 目标检测 门窗检测 特征角点
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Visualisation techniques to support public interpretation of future climate change and land-use choices:a case study from N-E Scotland
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作者 Chen Wang David Miller +2 位作者 Iain Brown Yang Jiang Marie Castellazzi 《International Journal of Digital Earth》 SCIE EI CSCD 2016年第6期586-605,共20页
Mitigating and adapting to climate change includes a requirement to evaluate the role of future land uses in delivering robust integrated responses that are sensitive to local landscape contexts.In practice,this empha... Mitigating and adapting to climate change includes a requirement to evaluate the role of future land uses in delivering robust integrated responses that are sensitive to local landscape contexts.In practice,this emphasises the need for community engagement,planning and inclusive decision-making.Community engagement may be potentially facilitated by the use of spatially explicit quantitative scenarios of landuse change in combination with interactive visualisation.This requires a coherent framework to integrate spatial data modelling,analytical capabilities and visualisation tools in a format that will also engage diverse public audiences.These challenges were explored with a case study of virtual landscapes from N-E Scotland that was used to test preferences for scenarios of future land use.Visualisations employed texture-based rendering rather than full photo-realistic rendering to facilitate interactivity and this provided additional scope for audiences to explore multiple future scenarios compared to the present landscape.Interactive voting in a virtual landscape theatre suggested preferences for visual diversity,good stewardship and perceived naturalness that should be considered in developing planned responses to change.Further investigation of preferences was conducted using interactive 3D features located within the landscape.Study findings are reviewed against objectives for inclusive engagement in the Digital Earth agenda and used to make further recommendations on the use of scenarios and visualisation tools.In particular,technical advances in user engagement need to be developed in conjunction with emerging good practice that addresses ethical,behavioural and inclusion issues so that the content is presented in as transparent and unbiased format as possible. 展开更多
关键词 Landscape visualisation geographic information systems land-use scenarios public participation knowledge exchange
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