Patent ID: 8854453
Filing Date: 2014-10-07
Classification: G01C,G01S

Abstract:
1. A method of determining real-world geographic position information of an object from an image, wherein the image is collected to develop a navigation database, the method comprising: capturing a plurality of images of geographic features, the plurality of images captured by a camera mounted on a vehicle; identifying a single image from the plurality of images; calculating a vanishing point in the single image as an intersection of lines in the single image; determining a real-world ground distance between a reference ground point in the single image and a ground point corresponding to an object in the single image, wherein determination of the real-world ground distance is based on the vanishing point in the single image and calibration values corresponding to the camera, wherein no images other than the single image are used in determining the real-world ground distance; and determining real-world geographic position information of the ground point corresponding to the object in the single image based on the determined real-world ground distance, the determined real-world geographic position information including a latitude coordinate and a longitude coordinate.