Method for recognizing location using built-in camera and device thereof
DCFirst Claim
1. A method for recognizing a location by a mobile terminal having a built-in camera, the method comprising:
- a) photographing a location recognition tag storing location recognition information;
b) measuring a distance to the location recognition tag;
c) analyzing an image of the photographed location recognition tag, and obtaining location information corresponding to the location recognition tag;
d) obtaining direction information of the photographed location recognition tag; and
e) calculating a mobile terminal location by using the distance information measured in b), the location information obtained in c), and the direction information obtained in d).
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Abstract
The present invention relates to a location recognition device for recognizing a location by a mobile terminal having a camera and a method thereof. In the above method, the location recognition device photographs a location recognition tag storing location recognition information, and measures a distance to the location recognition tag. Subsequently, the location recognition device analyzes an image of the photographed location recognition tag, and recognizes location information corresponding to the location recognition tag and direction information of the photographed location recognition tag. Accordingly, a location of the mobile terminal is measured by using information of the measured distance and the recognized location information and direction information. In this case, an absolute location coordinate or a logic location coordinate is stored in the location recognition tag. In addition, the location recognition tags are arranged so that using the location recognition tags achieves a desired precision in a predetermined physical area.
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Citations
12 Claims
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1. A method for recognizing a location by a mobile terminal having a built-in camera, the method comprising:
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a) photographing a location recognition tag storing location recognition information; b) measuring a distance to the location recognition tag; c) analyzing an image of the photographed location recognition tag, and obtaining location information corresponding to the location recognition tag; d) obtaining direction information of the photographed location recognition tag; and e) calculating a mobile terminal location by using the distance information measured in b), the location information obtained in c), and the direction information obtained in d). - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A location recognition device for recognizing a location by using a built-in camera, the location recognition device comprising:
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an image photographing unit for photographing a plurality of location recognition tags that are arranged in a predetermined physical area and respectively store location recognition information, and for performing a digital image process; a distance measuring unit for measuring a distance to the location recognition tag; an image analyzing unit for analyzing an image of the location recognition tag processed by the image photographing unit, and obtaining corresponding location information and direction information of the location recognition tag; and a location recognizing unit for recognizing a user location by using distance information measured by the distance measuring unit, and the location information and the direction information obtained by the image analyzing unit. - View Dependent Claims (9, 10, 11, 12)
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Specification