{
  "$type": "site.standard.document",
  "description": "A topology map-based user location estimation apparatus includes an Optical Character Recognition (OCR) module, an OCR filter, and a location finding module. The OCR module is configured to recognize characters from an image of an environment surrounding a user. The OCR filter is configured to…",
  "path": "/patents/1377607",
  "publishedAt": "2025-12-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/30",
    "HYUNDAI MOTOR COMPANY"
  ],
  "textContent": "A topology map-based user location estimation apparatus includes an Optical Character Recognition (OCR) module, an OCR filter, and a location finding module. The OCR module is configured to recognize characters from an image of an environment surrounding a user. The OCR filter is configured to, based on a similarity determination with location information stored in a topology map that is generated based on a guide map image, filter one or more characters from the recognized characters. The location finding module is configured to, based on the filtered one or more characters, detect a current location of the user on the topology map.",
  "title": "TOPOLOGY MAP-BASED USER LOCATION ESTIMATION APPARATUS AND METHOD"
}