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11. 发明授权

US06573842B2 Map display device, map display method, and computer program for use in map display device 有权
公开(公告)号：US06573842B2
公开(公告)日：2003-06-03
申请号：US09962723
申请日：2001-09-25
申请人： Yoshiyuki Mochizuki , Keiichi Senda
发明人： Yoshiyuki Mochizuki , Keiichi Senda
IPC分类号： G08G1123
CPC分类号： G01C21/3635
摘要： When a user indicates a portion of a map to be enlarged or contracted, a surface generating unit generates surfaces by gradually changing a surface from a first shape to a second shape, the first shape corresponding to a position of a map portion previously indicated and the second shape corresponding to a position of the map portion currently indicated. A mapping unit maps the map onto the generated surfaces in sequence, to obtain mapped images. A projecting/displaying unit sequentially projects the mapped images onto a flat virtual screen, and displays the projected images. Thus, the desired portion of the map can be enlarged/contracted, while maintaining connections of roads. Also, the map display can be transformed smoothly, even when the target of enlargement/contraction changes from one map portion to another according to the user's indications. This helps the user comprehend the contents of the map quickly and accurately.

12. 发明授权

US06650253B2 Map display device, map display method, and computer program for use in map display device 有权
标题翻译：地图显示设备，地图显示方式和计算机程序，用于地图显示设备
公开(公告)号：US06650253B2
公开(公告)日：2003-11-18
申请号：US09867112
申请日：2001-05-29
申请人： Yoshiyuki Mochizuki , Keiichi Senda , Kenji Nishimura
发明人： Yoshiyuki Mochizuki , Keiichi Senda , Kenji Nishimura
IPC分类号： G08G1123
CPC分类号： G01C21/3635 , G09B29/10
摘要： In a map display device, a surface storing unit stores surface information which defines a curved surface having a form that depends on positions of portions of a map which are to be enlarged and/or contracted. A mapping unit maps the map onto the curved surface defined by the surface information. A projecting/displaying unit projects the mapped map onto a flat virtual screen, and displays the projected image. Here, by defining the curved surface so that each part of the curved surface forms an intended angle with a line of sight in the projection, the image is displayed with desired portions enlarged and/or contracted, while maintaining connections of roads. The same effect can also be achieved by projecting the map onto a virtual screen having the form of the curved surface.
摘要翻译：在地图显示装置中，表面存储单元存储限定具有取决于要放大和/或缩小的地图的位置的形式的曲面的曲面信息。映射单元将地图映射到由表面信息定义的曲面上。投影/显示单元将映射的地图投影到平面虚拟屏幕上，并显示投影图像。这里，通过限定弯曲表面，使得弯曲表面的每个部分与投影中的视线形成预期的角度，在保持道路连接的同时，图像以期望的部分被放大和/或收缩地显示。也可以通过将地图投影到具有曲面形式的虚拟屏幕上来实现相同的效果。

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