Abstract: Visualization of relatively complex data sets and the simultaneous synchronization of such data sets across both a network and to different areas having different capabilities is disclosed, especially in connection with session structure, synchronization, synchronized control of imagery, and restoring synchronization to a predefined tour.

Abstract: The invention determines the location of multiple, simultaneous contact areas on a touch sensing region using a light source and several light detectors. The invention is robust against occlusion and many of the ambiguities that can arise with multiple, simultaneous contact areas. Generally, the light source is positioned such that light emanating the light source passes across the touch sensing region, and the light detector are positioned such that at least a portion of the light source is within the field of view of each light detector. The contact areas are determined by identifying positive fans corresponding to an angular sector of the field of view of a light detector in which the view of the light source is occluded and negative fans corresponding to an angular sector of the field of view of a light detector in which the view of the light source is not occluded. The positive fans and negative fans are then additively and subtractively combined, respectively, to determine the contact areas.

Abstract: The invention determines the location of multiple, simultaneous contact areas on a touch sensing region using a light source and several light detectors. The invention is robust against occlusion and many of the ambiguities that can arise with multiple, simultaneous contact areas. Generally, the light source is positioned such that light emanating the light source passes across the touch sensing region, and the light detector are positioned such that at least a portion of the light source is within the field of view of each light detector. The contact areas are determined by identifying positive fans corresponding to an angular sector of the field of view of a light detector in which the view of the light source is occluded and negative fans corresponding to an angular sector of the field of view of a light detector in which the view of the light source is not occluded. The positive fans and negative fans are then additively and subtractively combined, respectively, to determine the contact areas.

Abstract: A method and apparatus for identifying user gesture includes a touch sensor for determining contact information that describes locations at which a user contacts a touch sensitive surface corresponding to a display. The touch sensor provides the contact information to a gesture identification module which uses state information to identify a user gesture and, responsive thereto issues an associated display command to a display control module. The display control module updates the display based on display commands received from the gesture identification module.