Methods and apparatus for display of digital content associated with a location in a radio transmission area. A user interface is generated with a digital representation of energy levels received into an energy receiving sensor, such as a CCD or CMOS sensor. The user interface includes interactive portions based upon positions in the radio transmission area. The interactive portions may be activated to display the digital content in a user interface.

The present invention contemplates a variety of improved techniques including methods and apparatus for coordinating a plurality of devices, and more specifically, a method and apparatus for coordinating a plurality of devices to estimate or calculate various distances, relative positions, device attitudes, and other absolute and/or relative kinematic data.

Apparatuses and methods are described for determining displacement and/or rotation of a Unmanned Aerial Vehicle (UAV), including, but not limited to, determining a first Time of Flight (ToF) for audio signals transmitted by an audio transmitter of the UAV and received by a first audio receiver of the UAV while the UAV is in motion, determining a second ToF for the audio signals transmitted by the audio transmitter and received by a second audio receiver of the UAV while the UAV is in motion, and determining the displacement or the rotation of the UAV based, at least in part, on the first ToF and the second ToF.

According to one embodiment, a spatial position measurement apparatus, includes: a transmission unit configured to transmit an ultrasonic wave accompanying with a transmission source identifiable from three or more transmission sensors provided on a first object; a detection unit configured to detect the ultrasonic wave received by two or more reception sensors provided on a second object; a distance calculation unit configured to calculate distances between the transmission sensors and the reception sensors based on propagation time of the ultrasonic wave; and a coordinate calculation unit configured to calculate, in a coordinate system where a position of one group out of a group of the transmission sensors and a group of the reception sensors is fixed, positional coordinates of another group based on the distances.

A method for determining position of an aircraft with reference to a location on the ground includes transmitting an acoustic signal from a position on the aircraft to an array of spaced apart acoustic sensors proximate the location. The method includes at least one of (i) determining a time difference of arrival of the acoustic signal between each of the acoustic sensors and a reference acoustic sensor and (ii) determining an arrival time of the acoustic signal at each of the spaced apart acoustic sensors. The position of the aircraft is determined from the time differences of arrival and/or the arrival times.

A system for human interaction with virtual objects comprises: a touch sensitive surface, configured to detect a position of a contact made on the touch sensitive surface; a reference layer rigidly attached to the touch sensitive surface and comprising one or more patterns; a display device, configured to display a virtual object that is registered in a reference coordinate fixed with respect to the touch sensitive surface; one or more image sensors rigidly attached to the display device, configured to capture an image of at least a portion of the one or more patterns; and at least one processor, configured to determine a position and an orientation of the display device with respect to the touch sensitive surface based on the captured image, and identify an interaction with the virtual object based on the detected position of the contact made on the touch sensitive surface.

Methods and apparatus for display of digital content associated with a location in a wireless communications area. A user interface is generated with a digital representation of energy levels received into an energy receiving sensor, such as a CCD. The user interface includes interactive portions based upon positions in a wireless communication area. The interactive portions may be activated to display the digital content in a user interface.

A combined metrology method is provided for calculating the distance, the roll and pitch attitudes, and the relative orientations between two undersea points of interest. The method comprises positioning on the sea bottom a long-range acoustic positioning system having acoustic beacons, calibrating the system in order to determine the positions of the beacons relative to one another, deploying a vehicle on the sea bottom, taking a plurality of scenes around each point of interest in order to acquire point clouds, and processing the point clouds in order to calculate the coordinates of points in a common reference frame defined by the array of beacons and centered on the position of one of the acoustic beacons.

Methods and apparatus for display of digital content associated with a location of a Node in a wireless communication area. A user interface is generated with a digital representation of content associated with a physical tag or other Node. The user interface includes interactive portions based upon positions in the wireless communication area. The interactive portions may be activated to display the digital content associated with the physical tag in a user interface.

A method of determining the location of the first object (10) may include receiving signals at a second object (20) from a plurality of measurement points (11) on the first object (10), estimating locations of the plurality of measurement points (11) on the first object (10), determining an estimate of a location of the first object (10), determining a first measurement of an orientation of the first object (10) based on the estimating of the locations of the plurality of measurement points (11) on the first object (10), and determining a second measurement of the orientation of the first object (10) based on measurements by an orientation sensor (12) on the first object (10). The method may include estimating an error of the estimate of the location of the first object (10) based on a difference between the first and second orientation measurements and adjusting a movement of the second object (20) based on the estimated error.