Wearable device, method, and non-transitory computer readable storage medium for gesture input

A method performed by a wearable device comprising communication circuitry and a camera configured to capture an image of a part of a body of a user wearing the wearable device, the method comprising:

• identifying a relative movement of a hand of the user wearing another wearable device in a field-of-view (FOV) of the camera, wherein the other wearable device is in a low-power state in which obtaining motion data of the other wearable device, through a sensor of the other wearable device, is ceased;
• setting a first area within a first distance corresponding to the relative movement from an obstruction area in which the hand is not identified through the FOV of the camera;
• based on identifying that the hand moves into the first area, requesting, through the communication circuitry, the motion data from the other wearable device;
• obtaining, through the communication circuitry, motion data from the other wearable device transitioning from the low-power state to a normal state based on the hand moving into the first area;
• and
• identifying, based on the motion data, a gesture of the user through the hand.

A non-transitory computer-readable storage medium storing a program comprising instructions, wherein the instructions, when executed by at least one processor of a wearable device comprising communication circuitry and a camera configured to capture an image of a part of a body of a user wearing the wearable device, individually or collectively, cause the wearable device to:

• identify a relative movement of a hand of the user wearing another wearable device in a field-of-view (FOV) of the camera, wherein the other wearable device is in a low-power state in which obtaining motion data of the other wearable device, through a sensor of the other wearable device, is ceased;
• set a first area within a first distance corresponding to the relative movement from an obstruction area in which the hand is not identified through the FOV of the camera;
• based on identifying that the hand moves into the first area, request, through the communication circuitry, the motion data from the other wearable device;
• obtain, through the communication circuitry, motion data from the other wearable device transitioning from the low-power state to a normal state based on the hand moving into the first area;
• and
• identify, based on the motion data, a gesture of the user through the hand.