Detect fingers and wrist

*Points to detect (21 points = 4 for each finger + 1 for wrist)
[Thumb]
・tip
・interphalangeal (IP) joint.
・metacarpophalangeal (MP) joint.
・carpometacarpal (CMC) joint.

[Index]
・tip
・distal interphalangeal (DIP) joint.
・proximal interphalangeal (PIP) joint.
・metacarpophalangeal (MCP) joint.

[Middle]
・tip of the middle finger.
・distal interphalangeal (DIP) joint.
・proximal interphalangeal (PIP) joint.
・metacarpophalangeal (MCP) joint.

[Ring]
・tip
・distal interphalangeal (DIP) joint.
・proximal interphalangeal (PIP) joint.
・metacarpophalangeal (MCP) joint.

[Little]
・tip
・distal interphalangeal (DIP) joint.
・proximal interphalangeal (PIP) joint.
・metacarpophalangeal (MCP) joint.

[Wrist]
・wrist