MAP DISPLAY DEVICE
First Claim
1. A map display device comprising:
- a polygonization unit for converting map data displayed before display switching and map data to be displayed after the display switching into polygons having a same phase structure as each other;
a triangulation unit for determining triangulation which makes corresponding points between the map displayed before the display switching and the map to be displayed after the display switching have an equal connection relation in the polygons acquired by said polygonization unit; and
a morphing unit for, when morphing a map display to perform the display switching, creating map data about an intermediate map having a same phase structure as each of said map displayed before the display switching and said map to be displayed after the display switching on a basis of information about points within the polygons which are specified from results of the triangulation determined by said triangulation unit.
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Accused Products
Abstract
A map display device includes a map polygonization unit 5 for converting a map to be displayed before display switching and another map to be displayed after the display switching into polygons having the same phase structure as each other, a triangulation unit 6 for dividing each of these polygons into triangles which make corresponding points between the map to be displayed before the display switching and the other map to be displayed after the display switching have an equal connection relation, and a morphing unit 7 for, when morphing a map display to perform the display switching, creating map data about an intermediate map having the same phase structure as each of the map to be displayed before display switching and the other map to be displayed after display switching.
19 Citations
10 Claims
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1. A map display device comprising:
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a polygonization unit for converting map data displayed before display switching and map data to be displayed after the display switching into polygons having a same phase structure as each other; a triangulation unit for determining triangulation which makes corresponding points between the map displayed before the display switching and the map to be displayed after the display switching have an equal connection relation in the polygons acquired by said polygonization unit; and a morphing unit for, when morphing a map display to perform the display switching, creating map data about an intermediate map having a same phase structure as each of said map displayed before the display switching and said map to be displayed after the display switching on a basis of information about points within the polygons which are specified from results of the triangulation determined by said triangulation unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A map display device comprising:
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a pre-processing unit having a polygonization unit for converting map data displayed before display switching and map data to be displayed after the display switching into polygons having a same phase structure as each other, a triangulation unit for determining triangulation which makes corresponding points between the map displayed before the display switching and the map to be displayed after the display switching have an equal connection relation in the polygons acquired by said polygonization unit, and a storage unit for storing results of the triangulation determined by said triangulation unit therein while associating the results with corresponding map data; and a post-processing unit having a display unit for displaying map data, and a morphing unit for, when morphing a map display of said display unit to perform the display switching, creating map data about an intermediate map having a same phase structure as each of said map displayed before the display switching and said map to be displayed after the display switching on a basis of information about points within the polygons which are specified from the results of the triangulation determined by said triangulation unit.
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Specification