Interactive input system and pen tool therefor
AssigneeSMART Technologies ULC
InventorsSEAN THOMPSON, GRANT MCGIBNEY
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Abstract
A pen tool comprises an elongate body, a tip adjacent one end the body, and a filtered reflector disposed on the body, the filtered reflector comprising a reflecting portion and at least one filtering element, the at least one filtering element configured to permit illumination emitted at a selected wavelength to pass therethrough and impinge on the reflecting portion and to permit illumination at the selected wavelength that is reflected by the reflecting portion to exit the filtered reflector.
Claims31
A pen tool comprising:
- an elongate body;
- a tip adjacent one end the body;
- and
- a filtered reflector disposed on the body, the filtered reflector comprising a reflecting portion and at least one filtering element, the at least one filtering element configured to permit illumination emitted at a selected wavelength to pass therethrough and impinge on the reflecting portion and to permit illumination at the selected wavelength that is reflected by the reflecting portion to exit the filtered reflector.
An interactive input system comprising:
- at least one imaging assembly having a field of view aimed into a region of interest and capturing image frames thereof;
- at least one light source configured to emit illumination into the region of interest at a selected wavelength;
- and
- processing structure configured to process the captured image frames to determine a location of at least one pointer in a first region of the captured image frames, to define a pointer analysis region in the captured image frames separate from the first region, and to identify the at least one pointer based on a calculated intensity of at least a portion of the pointer analysis region.
A method of identifying at least one pointer brought into proximity with an interactive input system, the method comprising:
- emitting illumination into a region of interest from at least one light source at a selected wavelength;
- capturing image frames of the region of interest;
- and
- processing the captured image frames to determine a location of at least one pointer in a first region of the captured image frames, to define a pointer analysis region in the captured image frames separate from the first region, and to identify the at least one pointer based on a calculated intensity of at least a portion of the pointer analysis region.
A non-transitory computer readable medium tangibly embodying a computer program for execution by a computer to perform a method for identifying at least one pointer brought into proximity with an interactive input system, the method comprising:
- emitting illumination into a region of interest from at least one light source at a selected wavelength;
- capturing image frames of the region of interest;
- and
- processing the captured image frames to determine a location of at least one pointer in a first region of the captured image frames, to define a pointer analysis region in the captured image frames separate from the first region, and to identify the at least one pointer based on a calculated intensity of at least a portion of the pointer analysis region.
Dependencies are inferred from the claim text.