Touchless wrist measurement

A system comprising:

• memory;
• and
• one or more processors at a device coupled to the memory, wherein the memory comprises program instructions that, when executed on the one or more processors, cause the system to perform operations comprising:
• obtaining depth data captured by a depth sensor, the depth data comprising a set of depth map images of a wrist from different angles, wherein the set of depth map images are captured with different portions of the wrist facing the depth sensor;
• selecting at least two depth map images from the set based on determining that the two depth map images correspond to at least a minimum threshold difference in viewpoint with respect to an angle of the different angles;
• generating an output based on inputting the depth data into a machine learning model, the output corresponding to circumference of the wrist or a watch band size of the wrist;
• and
• providing a watch band size recommendation based on the output.

A non-transitory computer-readable storage medium, storing program instructions executable via one or more processors to perform operations comprising:

• obtaining depth data captured by a depth sensor, the depth data comprising a set of depth map images of a wrist from different angles, wherein the set of depth map images are captured with different portions of the wrist facing the depth sensor;
• selecting at least two depth map images from the set based on determining that the two depth map images correspond to at least a minimum threshold difference in viewpoint with respect to an angle of the different angles;
• generating an output based on inputting the depth data into a machine learning model, the output corresponding to circumference of the wrist or a watch band size of the wrist;
• and
• providing a watch band size recommendation based on the output.