Patent ID: 9239232
Filing Date: 2016-01-19
CPC Classification: G01B,G01C,G01S,G06T

Claim Text:
1. A method for determining a position and an orientation of a first measuring instrument, MI, the first MI including a retroreflector and at least one first optical radiation source configured to emit optical radiation when activated, said method comprising; selectively activating and deactivating the at least one first optical radiation source, and at least one imaging module, using a second MI, the second MI including at least one second optical radiation source configured to emit optical radiation when activated, and at least one target, TGT, the at least one TGT including at least one identifying device configured to enable the TGT to be identified in an image capturing said TGT; measuring an angle and a distance to the first MI and the at least one TGT, respectively, in relation to the second MI; causing the at least one imaging module to capture images, including alternating activation and deactivation of the at least one second optical radiation source; producing an image representation of each captured image; creating differential images using said image representations; extracting information regarding objects being present in the differential images; using said extracted information, distinguishing the second MI and the at least one TGT, respectively, from any other objects present in the images; on a condition that the second MI and the at least one TGT can be distinguished from any other objects present in the images: