Patent ID: 9749809
Date: 2017-08-29
CPC Classifications: G01S,G06T,H04L,H04W

Claim:
1. A system for determining a position and an attitude of a user terminal, comprising: a position/attitude determination server for receiving initial exterior orientation parameter and one or more camera images from a user terminal via a network, the position/attitude determination server being connected to a database containing previously georeferenced reference images; a search module connected with the position/attitude determination server that searches the database to identify a georeferenced reference image including an image similar to said one or more camera images received from the user terminal; an image matching module connected with the position/attitude server that compares at least one camera image received from the user terminal against the georeferenced reference image identified from the database, and extract coordinates of image points corresponding to a location of the two images being compared by the image matching module as first tie points; and a position/attitude adjustment module connected to the position/attitude determination server that performs a georeference procedure based on bundle adjustment to determine final exterior orientation parameters of the user terminal corresponding to the first tie points, wherein the final exterior orientation parameters of the user terminal determined by the position/attitude adjustment module are transmitted back to the user terminal.