Patent ID: 7606664
Filing Date: 2009-10-20
Classification: G01C

Abstract:
1. A guidance information system comprising: at least one portable device including an image pickup section and the function of decoding coded-pattern information captured by the image pickup section; and a display having a display surface that displays information indicative of a destination point and a present-position of the display in a display form according to a coding system of coded-pattern information for use in the portable device and that carries coded-pattern information to which an error-correction code is added, the information indicative of the present-position of the display including information to determine a current floor of the present-position of the display, from a plurality of floors, upon which the display is located, wherein the portable device includes: a relative-position detection section that detects the relative change of the position of the portable device without contact; a destination-position-information obtaining section that decodes specified coded-pattern information of the destination point captured by the image pickup section to obtain the coordinate-position information of the destination point on the Earth; a map-information obtaining section that obtains map information corresponding to the coordinate-position information on the Earth obtained by the destination-position-information obtaining section; a present-position-information generating section that obtains information on the present position of the portable device on the basis of the output of the relative-position detection section; a calibration-information obtaining section that decodes specified coded-pattern information of the present-position of the display captured by the image pickup section to obtain calibration information for coordinate-position information on the Earth of the present position of the portable device, the present-position-information generating section calibrating the information on the present position of the portable device obtained on the basis of the output of the relative-position detection section according to the calibration information obtained by the calibration-information obtaining section; and a guidance-information generating section that generates guidance information for guidance from the present position of the portable device to the destination point on the basis of various information including the coordinate-position information on the Earth obtained by the destination-position-information obtaining section, the map information obtained by the map-information obtaining section, the information of the present-position of the display, including the current floor of the present-position of the display, and the information on the present position of the portable device generated by the present-position-information generating section.