Road exit modeling using aerial image
First Claim
1. A machine-readable medium, containing at least one sequence of instructions that, when executed, causes a machine to:
- geographically align a road map and a photographic image of a region that includes a region depicted by the road map;
extract, from the aligned photographic image, a start point and an end point of an exit line which separates a main road and a branch road;
determine an exit line connecting the extracted start point and the extracted end point; and
identify a branching position between the main road and the branch road based on the determined exit line.
1 Assignment
0 Petitions
Accused Products
Abstract
To improve map accuracy by a new method that represents a road exit, there is provided a map generating apparatus for drawing a road map from digital data of a road map and a photographic image of a region that includes a region depicted by the road map, in which: a provided photographic image and a provided road map are geographically aligned with each other; a start point and an end point of an exit line which separates a main road and a branch road are extracted from the aligned photographic image; an exit line connecting the extracted start point and the extracted end point is determined; and a position of an exit branch is identified based on the determined exit line.
19 Citations
13 Claims
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1. A machine-readable medium, containing at least one sequence of instructions that, when executed, causes a machine to:
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geographically align a road map and a photographic image of a region that includes a region depicted by the road map; extract, from the aligned photographic image, a start point and an end point of an exit line which separates a main road and a branch road; determine an exit line connecting the extracted start point and the extracted end point; and identify a branching position between the main road and the branch road based on the determined exit line. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A map generating apparatus for drawing a road map from digital data of a road map and a photographic image of a region that includes a region depicted by the road map, comprising:
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a computing unit; and a memory, wherein the computing unit is configured to; geographically align a provided photographic image and a provided road map with each other; extract, from the aligned photographic image, a start point and an end point of an exit line which separates a main road and a branch road; determine an exit line connecting the extracted start point and the extracted end point; and identify a branching position between the main road and the branch road based on the determined exit line. - View Dependent Claims (8, 9)
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10. A position display system for displaying a position on a map based on positional information obtained by a position measuring device, comprising:
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a computing unit; a display unit; and a memory, wherein the memory stores data of a map containing an exit line which separates a main road and a branch road, wherein the position measuring device measures a position of a vehicle, and wherein the computing unit is configured to; identify, on the main road, a position measured by the position measuring device; and move a displayed position of the vehicle, when the identified position is within a given area which is zoned by the exit line. - View Dependent Claims (11, 12, 13)
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Specification