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Method for generating a customized composite map image and electronic apparatus for implementing the same

  • US 9,002,142 B2
  • Filed: 01/25/2011
  • Issued: 04/07/2015
  • Est. Priority Date: 01/26/2010
  • Status: Active Grant
First Claim
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1. A method for generating a customized composite map image, said method to be implemented by a personal navigation device that has a map database established therein and comprising the steps of:

  • a) receiving, by the personal navigation device, a user-specified input image of an area of interest, the user-specified input image being one of a landmark guide map, an establishment guide map, and a road map;

    b) obtaining, by the personal navigation device, from the map database a reference map that encompasses the area of interest;

    c) selecting, by the personal navigation device, a set of feature points in the user-specified input image and a set of map points in the reference map that correspond in geographical features to the feature points;

    d) automatically transforming, by the personal navigation device, the user-specified input image according to positional differences between said feature points and the corresponding map points so as to obtain a to-be-registered image having adjusted feature points corresponding in position to the map points;

    e) automatically overlaying, by the personal navigation device, the to-be-registered image onto the reference map in a manner that the adjusted feature points coincide with the corresponding map points to thereby obtain a customized composite map image; and

    f) outputting, by the personal navigation device, the customized composite map image;

    wherein, in step c), the feature points and the map points are automatically selected by the personal navigation device through pattern matching of the user-specified input image with the reference map according to a set of pre-defined user-configured selection rules;

    wherein the set of pre-defined user-configured selection rules defines at least one of a T-intersection, a Y-intersection, a main road, and a landmark, for pattern matching of the geographical features of the user-specified input image with the reference map.

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