Landmark search apparatus, electronic apparatus and imaging apparatus having the same, and landmark search method
First Claim
1. A landmark search apparatus for retrieving landmarks around an object, comprising:
- a position obtaining unit configured to obtain a current position of the object;
a first storage unit configured to store landmark information including a name of a landmark and position information of the landmark related to the name;
an retrieving unit configured to configured to retrieve the landmark information from the first storage unit based on the obtained current position;
a second storage unit configured to store the retrieved landmark information as retrieved landmark information; and
a determining unit configured to determine whether the retrieved landmark information is valid based on;
i) the current position of the object;
ii) a previous position of the object at a time of storing the retrieved landmark information in the second storage unit;
iii) a first distance between the previous position and a farthest landmark from the previous position in landmarks indicated by the landmark information stored in the second storage unit; and
iv) a second distance between the previous position and a landmark which is N-th farthest from the previous position in the landmarks indicated by the landmark information stored in the second storage unit, N being a predetermined number,wherein the determining unit determines whether a moving distance of the object from the previous position to the current position is more than a half of the first distance minus the second distance to determine whether the retrieved landmark information is valid.
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Accused Products
Abstract
A landmark search apparatus includes a position obtaining unit configured to obtain a current position of the object, a first storage unit configured to store landmark information including a name of a landmark and position information of the landmark related to the name, an retrieving unit configured to retrieve the landmark information from the first storage unit based on the obtained current position, a second storage unit configured to store the retrieved landmark information as retrieved landmark information, and a determining unit configured to determine whether the retrieved landmark information is valid, based on the current position of the object, and a distance between a position of the subject at the time of storing the retrieved landmark information in the second storage unit and the landmark indicated by the retrieved landmark information.
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Citations
18 Claims
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1. A landmark search apparatus for retrieving landmarks around an object, comprising:
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a position obtaining unit configured to obtain a current position of the object; a first storage unit configured to store landmark information including a name of a landmark and position information of the landmark related to the name; an retrieving unit configured to configured to retrieve the landmark information from the first storage unit based on the obtained current position; a second storage unit configured to store the retrieved landmark information as retrieved landmark information; and a determining unit configured to determine whether the retrieved landmark information is valid based on;
i) the current position of the object;
ii) a previous position of the object at a time of storing the retrieved landmark information in the second storage unit;
iii) a first distance between the previous position and a farthest landmark from the previous position in landmarks indicated by the landmark information stored in the second storage unit; and
iv) a second distance between the previous position and a landmark which is N-th farthest from the previous position in the landmarks indicated by the landmark information stored in the second storage unit, N being a predetermined number,wherein the determining unit determines whether a moving distance of the object from the previous position to the current position is more than a half of the first distance minus the second distance to determine whether the retrieved landmark information is valid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 17)
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12. A landmark search method for searching for landmarks around an object, the method comprising:
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obtaining a current position of the object; storing a name of the landmark and position information of the landmark, as landmark information, in a first storage unit, with the name of the landmark related with the position information of the landmark; retrieving the landmark information from the first storage unit based on the obtained current position; storing the retrieved landmark information, as retrieved landmark information, in a second storage unit; and determining whether the retrieved landmark information is valid based on;
i) the current position of the object;
ii) a previous position of the object at a time of storing the retrieved landmark information in the second storage unit;
iii) a first distance between the previous position and a farthest landmark from the previous position in landmarks indicated by the landmark information stored in the second storage unit; and
iv) a second distance between the previous position and a landmark which is N-th farthest from the previous position in the landmarks indicated by the landmark information stored in the second storage unit, N being a predetermined number,wherein the determining determines whether a moving distance of the object from the previous position to the current position is more than a half of the first distance minus the second distance to determine whether the retrieved landmark information is valid. - View Dependent Claims (13, 14, 15, 16, 18)
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Specification