Modeling Surperspective Projection of Landscapes for Geographical Guide‐Map Generation
Modeling Surperspective Projection of Landscapes for Geographical Guide‐Map Generation
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DOI：
10.1111/1467-8659.t01-1-00585
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发表时间：
2002-09
影响因子：
2.5
通讯作者：
Shigeo Takahashi;N. Ohta;Hiroko Nakamura;Yuriko Takeshima;I. Fujishiro
中科院分区：
文献类型：
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作者：
Shigeo Takahashi;N. Ohta;Hiroko Nakamura;Yuriko Takeshima;I. Fujishiro
生成手绘图片仍然具有挑战性，因为它们与普通照片不同，因为它们通常是从多个视点绘制的。本文提出了一种基于形状变形技术的超透视投影建模新方法。具体来说，用于导览地图的透视景观图像是由3D地理高程数据生成的。我们的方法首先将目标地理表面划分为特征区域，为设计人员提供适合编辑的地标。该系统以二维视觉效果作为输入，将其转换为三维几何约束，用于地理表面变形。使用普通透视投影，然后将变形的形状转换为目标导览图图像，其中每个地标都有自己的远景点。本文还考虑了一种基于地理形状特征半自动计算二维视觉效果的算法。
It is still challenging to generate hand‐drawn pictures because they differ from ordinary photographs in that they are often drawn as seen from multiple viewpoints. This paper presents a new approach for modeling such surperspective projection based on shape deformation techniques. Specifically, surperspective landscape images for guide‐maps are generated from 3D geographical elevation data. Our method first partitions a target geographical surface into feature areas to provide designers with landmarks suitable for editing. The system takes as input 2D visual effects, which are converted to 3D geometric constraints for geographical surface deformation. Using ordinary perspective projection, the deformed shape is then transformed into a target guide‐map image where each landmark enjoys its own vista points. An algorithm for calculating such 2D visual effects semi‐automatically from the geographical shape features is also considered.