Calibration of portable devices in a shared virtual space

A method comprising:

• associating a first device to a reference point in a three-dimensional (3D) space;
• exchanging position information between the first device and a second device to enable the second device to associate to the reference point;
• calculating by the first device a position of the first device in the 3D space based on inertial information captured by the first device;
• capturing images with a camera of the first device;
• identifying locations of one or more static features in the images;
• correcting the position of the first device based on the identified locations of the one or more static features;
• and
• presenting a view of a shared interactive scene in a display of the first device, wherein operations of the method are executed by a processor.

A non-transitory computer-readable storage medium storing a computer program, the computer-readable storage medium comprising:

• program instructions for associating a first device to a reference point in a three-dimensional (3D) space;
• program instructions for calculating by the first device a position of the first device in the 3D space based on inertial information captured by the first device;
• program instructions for capturing images with a camera of the first device;
• program instructions for identifying locations of one or more static features in the images;
• program instructions for correcting the position of the first device based on the identified locations of the one or more static features;
• and
• program instructions for presenting a views of an interactive scene in a display of the first device, wherein the interactive scene is tied to the reference point and includes virtual object.