Navigation device, navigation method, and navigation program
First Claim
1. A navigation device comprising:
- an image acquiring unit that acquires an image from an image-capturing unit, which is mounted in a vehicle to capture an image of a feature on a road;
a correction distance storing unit that stores a correction distance to correct a difference between a first vehicle position, which is a position of the vehicle when the feature disappears from an imaging area of the image-capturing unit, and a second vehicle position, which is a position of the vehicle when the feature disappears from a driver'"'"'s view, the correction distance being along a travel direction of the vehicle;
a judging unit that judges based on the image acquired by the image acquiring unit and the correction distance stored in the correction distance storing unit whether the vehicle has arrived at the second vehicle position; and
a guidance unit that, if the judging unit has judged that the vehicle has arrived at the second vehicle position, provides guidance regarding the feature at a predetermined position having the second vehicle position as a reference.
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Accused Products
Abstract
A navigation apparatus and method are provided. The navigation apparatus includes an image acquiring part that acquires an image of a road feature from a vehicle camera. The apparatus also includes a correction distance table that stores a correction distance to correct a difference between a position of a vehicle when the feature disappears from an imaging area of the camera and a guidance output reference position that is a position of the vehicle when the feature disappears from a driver'"'"'s view. Further, a judging part is included and judges, based on the image acquired by the image acquiring part and the correction distance stored in the correction distance table, whether the vehicle has arrived at the guidance output reference position. Lastly, the apparatus includes a guidance part that provides guidance regarding the traffic light at a predetermined position having the guidance output reference position as a reference.
10 Citations
11 Claims
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1. A navigation device comprising:
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an image acquiring unit that acquires an image from an image-capturing unit, which is mounted in a vehicle to capture an image of a feature on a road; a correction distance storing unit that stores a correction distance to correct a difference between a first vehicle position, which is a position of the vehicle when the feature disappears from an imaging area of the image-capturing unit, and a second vehicle position, which is a position of the vehicle when the feature disappears from a driver'"'"'s view, the correction distance being along a travel direction of the vehicle; a judging unit that judges based on the image acquired by the image acquiring unit and the correction distance stored in the correction distance storing unit whether the vehicle has arrived at the second vehicle position; and a guidance unit that, if the judging unit has judged that the vehicle has arrived at the second vehicle position, provides guidance regarding the feature at a predetermined position having the second vehicle position as a reference. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A navigation method comprising the steps of:
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storing, in a storing unit, a correction distance to correct a difference between a first vehicle position, which is a position of a vehicle when a feature disappears from an imaging area of an image-capturing unit mounted in the vehicle to capture an image of the feature on a road, and a second vehicle position, which is a position of the vehicle when the feature disappears from a driver'"'"'s view, the correction distance being along a travel direction of the vehicle; acquiring the image captured by the image-capturing unit; judging based on the image acquired at the image acquiring step and the correction distance acquired from the storing unit whether the vehicle has arrived at the second vehicle position; and if it has been judged at the judging step that the vehicle has arrived at the second vehicle position, providing guidance regarding the feature at a predetermined position having the second vehicle position as a reference. - View Dependent Claims (8, 9, 10, 11)
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Specification