Smart Technologies Ulc

Daniel McReynolds

Grant Howard McGibney

David Holmgren

Gerald D Morrison

Roberto Sirotich

Joe Wright

Alex Chtchetinine

Yun Zhang

Michael Trenholm-Boyle

Evan Ross

Warren Barkley

Neil Gaydon

Grant Mcgibney

Tim Schanne

Brinda Kabada

Stanley Tarng

Ye Zhou

David E Holmgren

The present invention relates to a method and system of improved pointer recognition. A camera-based interactive system has two cameras with fields of view observing an interactive surface. A processor receives a plurality of video frames from the cameras and recognizes a pointer within the video frames. Motion blur of the pointer is compensated to determine the pointer type from the compensated frames using a model-based approach.

System and method of object recognition for an interactive input system

An interactive board comprises an interactive surface; at least one user selectable element; and processing structure in communication with at least one imaging device and configured to process data received from said at least one imaging device to locate at least one pointer positioned in proximity with said interactive surface and update digital ink according to pointer location, said processing structure being further configured to send said digital ink to one or more devices in communication with the interactive board in response to selection of said at least one user selectable element.

Interactive input system, interactive board therefor and methods

An illumination structure for an interactive input system having a display surface and a light source for backlighting the display surface is provided. The illumination structure includes at least one redirection structure positioned with respect to the display surface to receive excess light produced by the light source and to redirect the excess light generally across the display surface for backlighting one or more pointers. A method is provided for determining the location of at least one pointer in an interactive input system. The method includes capturing images generally across a display surface of a region of interest and a reflection of the region of interest; examining the images to determine at least one first potential target location for at least one pointer that is within the region of interest; analyzing the at least one first potential target location to resolve at least one first true target location associated with the at least one pointer; and calculating a first location for the at least one pointer corresponding to the at least one first true target location.

Illumination structure for an interactive input system

A method for generally continuously calibrating an interactive input system, the interactive input system comprising at least two imaging devices having fields of view encompassing a region of interest, at least one of the imaging devices calibrated using a projection matrix having an associated quality metric, the method comprises estimating new values for parameters of the projection matrix based on a plurality of computed locations of at least one pointer brought into proximity with the region of interest; calculating a new quality metric using the new parameter values; and if the new quality metric is more accurate than the existing quality metric, updating the projection matrix using the new parameter values.

Method for generally continuously calibrating an interactive input system

A method for resolving ambiguities between at least two pointers in a plurality of input regions defining an input area of an interactive input system. The method includes capturing images of the plurality of input regions, the images captured by a plurality of imaging devices having a field of view of at least a portion of the input area, processing image data from the images to identify a plurality of targets for the at least two pointers within the input area, and analyzing the plurality of targets to resolve a real location associated with each pointer.

Interactive input system

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Calgary, Canada

Daniel McReynolds