Patent ID: 11971493
Assignee: NANNING FULIAN FUGUI PRECISION INDUSTRIAL CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An indoor positioning method based on image visual features executable by a client, comprising:
matching a Wi-Fi signal strength value of a Wi-Fi tag closest to a current location of a mobile device with a signal strength list in a map database to obtain a first location of a first Wi-Fi tag with the greatest matching degree;
matching a speeded up robust features (SURF) descriptor of an image of the Wi-Fi tag closest to the current location of the mobile device with SURF descriptors recorded in the signal strength list in the map database to discover an image of a Wi-Fi tag with the greatest matching degree, thereby obtaining a second location of a second Wi-Fi tag corresponding to the image of the Wi-Fi tag with the greatest matching degree;
obtaining a three location of a three Wi-Fi tag according to a homography matrix corresponding to the image of the Wi-Fi tag with the largest matching degree; and
obtaining positioning information of the mobile device according to the first location, the second location and the third location.