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作 者:蓝贵文 佘丽霞 张强 LAN Guiwen;SHE Lixia;ZHANG Qiang(Collage of Geomatics and Geoinformation/Guangxi Key Laboratory of Spatial informalion and Geomatics, Guilin University of Technology,Guilin,Guangxi541004,China)
机构地区:[1]桂林理工大学测绘地理信息学院/广西空间信息与测绘重点实验室,广西桂林541004
出 处:《测绘科学》2019年第3期172-178,共7页Science of Surveying and Mapping
基 金:国家自然科学基金项目(41261088);广西空间信息与测绘重点实验室主任基金项目(151400706;163802509);广西区研究生创新计划项目(002504216008);广西"八桂学者"岗位专项经费资助
摘 要:针对矢量数据在网络上渐进传输中的多尺度组织问题,该文提出一种基于视觉显著性特征的多尺度增量组织和表达方法。根据人类视觉机制和矢量地图的多尺度表达特征,提出了基于视觉显著性的多尺度矢量模型,实现矢量空间要素的多尺度表达和线性序列组织。以线要素为例,讨论多尺度空间下矢量空间要素的视觉显著性和视觉信息增量变化。实验表明,本文提出的方法可以较好地改进渐进传输时矢量数据的可视化效果。To transfer vector data progressively over the Internet for visualization purpose,this paper proposed it generally required the vector data being represented and organized in a multi-scale way. A met hod for multi-scale representation and organization of vector data based on visual saliency was put forward in this paper.According to the mechanism of the human visual systems and the multi-scale representation of vector maps, the multi-scale vector model based on visual saliency was proposed for multi scale representation and linear serialization of spatial objects. The changes of visual saliency and the increments of visual information of vector objects in different scales were discussed by taking a line object as an example. The experimental result showed that the proposed method was effective in improving visualization of vector data by progressive transmission.
分 类 号:P208[天文地球—地图制图学与地理信息工程]
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