Tracking position of device inside-out for augmented reality interactivity

1. A method, comprising:

identifying a reference point in a three-dimensional (3D) space using a portable device, the reference point is calibrated to an origin point at which the portable device is placed within the 3D space, and said calibration to the origin point is initiated responsive to input received from the portable device when placed and held at the reference point;

determining by the portable device a position and an orientation of the portable device when placed at the origin point and other points in the 3D space relative to the origin point, the position and orientation is determined using data from an inertial sensor of the portable device and data from the camera, wherein said calibration resets the inertial sensor to identify the position and orientation of the portable device relative to the origin point when placed and held at the reference point; and

generating by the portable device an augmented reality (AR) space using the reference point, wherein the AR space includes virtual objects imposed over the 3D space and the portable device updates views into the AR space based on changes in the position and orientation of the portable device.

2. The method of claim 1 , wherein the AR space has a second coordinate system that is referenced from a first coordinate system of the 3D space.

3. The method of claim 1 , wherein the portable device uses a connection to a network to obtain data for the generating of the virtual objects of the AR space.

4. The method of claim 1 , further comprising,

tracking movement of the portable device in the 3D space, wherein movement changes the position and orientation of the portable device which provides for said updates to views presented into the AR space.

5. The method of claim 4 , wherein the view presented into the AR space includes real-world objects in the 3D space and one or more of said virtual objects, wherein said virtual objects in the view are oriented in the AR space in relation to one or more real-world objects.

6. The method of claim 4 , wherein the view of the of the AR space provides views of one or more of the virtual objects from one or more view perspectives based on changes to the position and orientation of the portable device as the portable device moves and is tracked for movement, wherein the tracking of the movement is facilitated by one or both of the inertial sensor of the portable device and one or more images taken by the camera of the portable device.

7. The method of claim 1 , wherein movements of the portable device closer to or further from virtual object provides for different views of the virtual object, and the movements closer and further are tracked using one or both of the inertial sensor and the camera of the portable device, the different views being shown on a display of the portable device.

8. The method of claim 1 , wherein the portable device is one of,

a portable gaming device;

a handheld portable gaming device;

a game controller;

a cell phone;

a head mounted display;

a notebook;

a tablet;

a netbook; or

a PDA.

9. The method of claim 1 , wherein said input for identifying the reference point via said calibration includes one of tapping the portable device, or holding the portable device at the reference point, or providing an input to a user interface of the portable device, or engaging an actuator.

10. The method of claim 1 , wherein the portable device is tracked using one or both of the inertial sensor and the camera, and the inertial sensor includes one or both of a 3-axis accelerometer or a 3 axis gyroscope, and the camera includes depth sensing.