Tracking system, tracking method, and self-tracking tracker

A tracking method, comprising:

• displaying, by a display of a head-mounted display (HMD) device, a virtual world;
• obtaining, by a first camera of the HMD device, a first image;
• generating, by a first processor of the HMD device, a first tracking result of a user based on the first image;
• detecting, by a tracking sensor of a self-tracking tracker, sensor data;
• obtaining, by a second camera of the self-tracking tracker, a second image;
• generating, by a second processor of the self-tracking tracker, a self-tracking result of the self-tracking tracker based on the sensor data;
• generating, by the second processor of the self-tracking tracker, a second tracking result of the user based on the second image and the self-tracking result;
• updating, by the first processor of the HMD device, an avatar of the user in the virtual world based on the first tracking result and the second tracking result;
• detecting, by the self-tracking tracker, whether the self-tracking tracker is placed stably on a plane or hanged on a wall based on the second image or the sensor data;
• and
• in response to the self-tracking tracker not being placed stably, the second tracking result is not generated.

A self-tracking tracker, comprising:

• a tracking sensor, configured to detect sensor data;
• a camera, configured to obtain a user image;
• a processor, configured to:
• generate a self-tracking result based on the sensor data;
• and
• generate a tracking result based on the user image and the self-tracking result;
• and
• a network module, configured to provide the tracking result for updating an avatar of the user in a virtual world
• wherein the self-tracking tracker is configured to detect whether the self-tracking tracker is placed stably on a plane or hanged on a wall based on the second image or the sensor data;
• and
• in response to the self-tracking tracker not being placed stably, the second tracking result is not generated.