Varjo Technologies Oy

Varjo Technologies Dy

Juha Ala-luhtala

Oleksandr Dovzhenko

Roman Golovanov

A tracking system includes light sources arranged spatially around user-interaction controller(s) of head-mounted device; a controller-pose-tracking means is arranged in the user-interaction controller(s); an HMD-pose-tracking means and camera(s) arranged on a portion of HMD that faces a real-world environment. Processor(s) are configured to estimate a relative pose of the controller(s) with respect to the HMD, determine current value and/or pulse width modulation (PWM) value to be employed for controlling brightness of light source(s) from amongst the light sources, generate control signal for setting current value and/or PWM value for light source(s), and send a control signal to controller(s). The process image(s) captured by camera(s) identify blob(s) representing light source(s) and correct estimated relative pose, based on at least one of: position, orientation, brightness, size, shape, of the blob(s).

Adjusting brightness of light sources of controller

A tracking system for use in head-mounted device (HMD) includes light sources arranged spatially around user-interaction controller(s); controller-pose-tracking means arranged in user-interaction controller(s); HMD-pose-tracking means; camera(s) arranged on portion of HMD that faces real-world environment in which HMD is in use; and processor(s) configured to estimate relative pose, based on controller-pose-tracking data and HMD-pose-tracking data; determine sub-set of light sources, based on estimated relative pose and arrangement of light sources; selectively control light sources such that light sources of sub-set are activated, whereas remaining light sources are deactivated; process at least one image, captured by camera(s), to identify operational state of light source(s) of sub-set that is visible in image(s), wherein image(s) is indicative of actual relative pose; and correct estimated relative pose to determine actual relative pose, based on operational state.

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Helsinki, Finland

Juha Ala-luhtala