Patent ID: 9189858
Filing Date: 2015-11-17
Classification: G01C,G06T

Abstract:
1. A method for determining three-dimensional coordinates of a target that is located remote from a surveying instrument, the three-dimensional coordinates determined in relation to the surveying instrument, the surveying instrument comprising a first camera in a first camera position and orientation, and a second camera in a second camera position and orientation, the first camera being eccentric to a rotation center of the surveying instrument, and the second camera position being spaced from the first camera position by a distance, the method comprising: capturing a first image using the first camera, the first image including the target; selecting the target by identifying at least one object point in the first image; measuring first image coordinates of the at least one object point in the first image; capturing a second image using the second camera, the second image including the target; identifying, in the second image, the at least one object point identified in the first image, wherein the identifying, in the second image, includes, measuring second image coordinates of the at least one object point in the second image; and determining the three-dimensional coordinates of the target in relation to the rotation center of the surveying instrument based on the first camera position and orientation, the first image coordinates, the second camera position and orientation, the second image coordinates, and the first and second camera calibration data.