Camera Placement

When using TouchFree our Hand Tracking Software supports the following camera positions:

  • Above Facing User

  • Above Facing Screen

  • Below

Confirm hand tracking is optimal for your chosen camera placement with the Testing Hand Tracking section.

Above Facing User

TouchFree Screentop camera placement
  • The Ultraleap Hand Tracking Camera should be positioned so that it is at least 15cm from the highest point on the screen that users will be interacting with.

  • The camera tilt should be no more than 30° from the horizontal – recommended angles are between 15° to 30°.

  • For best results, ensure that the camera is positioned at a minimum depth of 1 cm away from the screen


Above Facing Screen

TouchFree HMD camera placement
  • The Ultraleap camera module should be at least 10cm away from the highest point where the hand enters.

  • The camera tilt should be between 15° to 85° from the horizontal.


Below

TouchFree Desktop camera placement
  • The Ultraleap camera module should be at least 10cm below the lowest point on the screen that users will interact with.

  • The camera tilt should be no more than 20° from the horizontal.

  • Ensure that the camera is a minimum of 1cm away from the screen.


Ultraleap Camera Position Visualizer (CPV) Tool

CPV Preview

Our CPV tool helps kiosk manufacturers and integrators determine the ideal positioning of the Ultraleap Hand Tracking Camera. You can visualize and customize different screen sizes and orientations. You can try different camera positions to find the best placement and angle for your needs, and model the tracking zones and field of view.

Launch Camera Position Visualizer   

Camera Position Visualizer (CPV) User Manual

Check out the CPV User Manual for full documentation around usage and controls, as well as customization of the CPV Tool.


Guidelines

When choosing and positioning your Ultraleap Hand Tracking Camera, make sure that UI elements are within the field of view.

Leap Motion Controller

Stereo IR 170 Camera Module

Interaction zone depth

Between 10cm to 60cm preferred, up to 80cm maximum

Between 10cm to 75cm preferred, up to 1 m maximum

Field of view

140×120° typical field of view

170×170° typical field of view


Leap Motion Controller

Stereo IR 170

Leap Motion Controller

Stereo IR 170

TouchFree camera placement FoV 22” screen / UI

TouchFree camera placement FoV 29” screen / UI

TouchFree camera placement FoV 27” screen / UI

TouchFree camera placement FoV 40” screen / UI

Note

Diagrams based on screens having 16:9 aspect ratio


Ensure that there are minimal infrared (IR) sources and reflections in the camera’s field-of-view. These can reduce the quality of hand tracking.

Digital screens can act as mirrors, creating IR glare from the camera module’s own LEDs. To avoid this, place the camera outside the screen’s projection plane.

Operating your Ultraleap camera in bright sunlight may also impact performance. To improve performance, consider changing your camera placement.

We recommend using the Visualizer to check that hand tracking is operating as expected.

For more details see Testing Hand Tracking.

TouchFree IR sources

IR sources and reflections can be seen in the Visualizer.

TouchFree Camera Projection Plane

Camera should be placed outside of the screen’s projection plane. Try to maintain this even when screen is tilted.

TouchFree Object in Camera FoV

Make sure there are no obstructions within the field of view of the camera. The background should be as simple as possible.

TouchFree Hands not Tracked

Use the Visualizer to check for obstructions. In this example, hands are not tracked even though they are in the centre of the camera module’s field of view.


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