Patent attributes
Provided is a tangible, non-transitory, machine readable medium storing instructions that when executed by the image processor effectuates operations including: capturing, with a first image sensor, a first image of at least two light points projected on a surface by the at least one laser light emitter; extracting, with at least one image processor, a first distance between the at least two light points in the first image in a first direction; and estimating, with the at least one image processor, a first distance to the surface on which the at least two light points are projected based on at least the first distance between the at least two light points and a predetermined relationship relating a distance between at least two light points in the first direction and a distance to the surface on which the at least two light points are projected.
