Patent ID: 11947736
Assignee: VARJO TECHNOLOGIES OY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 19:
20. The method of claim 15, wherein the at least one light source is a white light source and the at least one camera is at least one autofocus polychromatic camera, and wherein the method further comprises:
receiving, from an external tracking means, an estimated distance of the white light source from the at least one autofocus polychromatic camera; and
adjusting a focus of the at least one autofocus polychromatic camera according to the estimated distance, for enabling the at least one autofocus polychromatic camera in capturing the at least one image using the adjusted focus;
wherein the step of determining the level of focussing of the white light source in the at least one image comprises determining one of: brightnesses of constituent colour components of white light in at least one central pixel of the at least one image segment, relative brightnesses of constituent colour components of white light in at least one central pixel of the at least one image segment, wherein the brightnesses or the relative brightnesses are indicative of the level of focussing of the white light source in the at least one image,
and the step of determining the distance between the at least one camera and the white light source comprises correcting the estimated distance according to the level of focussing of the white light source in the at least one image and the focus of the at least one autofocus polychromatic camera, for obtaining a corrected distance between the between the at least one camera and the white light source, the corrected distance being used to determine the pose of the at least one controller in the global coordinate space.