Our AI module tracks skeletal keypoints and landmarks. Keypoints include connections between bones, such as shoulders, elbows, wrists, hips, and ankles. Landmarks include facial features such as eyes and ears.
For simplicity, we are referring to keypoints and landmarks collectively as joints. We’ll be using the term joint interchangeably.
The table below displays the JointType enumeration indices, names, and descriptions.
| Index | Name | Description |
|---|---|---|
| 0 | Nose | The tip of the nose. |
| 1 | Neck | The bottom of the neck. |
| 2 | ShoulderRight | The point of articulation between the right scapula and humerus bones. |
| 3 | ElbowRight | The point of articulation between the right arm and forearm bones. |
| 4 | WristRight | The transition point between the right forearm and hand. |
| 5 | ShoulderLeft | The point of articulation between the left scapula and humerus bones. |
| 6 | ElbowLeft | The point of articulation between the left arm and forearm bones. |
| 7 | WristLeft | The transition point between the left forearm and hand. |
| 8 | HipRight | The point of articulation between the head of the right femur and the acetabulum of the pelvis. |
| 9 | KneeRight | The point of articulation between the right femur and leg (tibia + fibula) bones. |
| 10 | AnkleRight | The point of articulation between the bones of the right leg and talus. |
| 11 | HipLeft | The point of articulation between the head of the left femur and the acetabulum of the pelvis. |
| 12 | KneeLeft | The point of articulation between the left femur and leg (tibia + fibula) bones. |
| 13 | AnkleLeft | The point of articulation between the bones of the left leg and talus. |
| 14 | EyeRight | The center of the right eyeball. |
| 15 | EyeLeft | The center of the left eyeball. |
| 16 | EarRight | The center of the right ear. |
| 17 | EarLeft | The center of the left ear. |
| 18 | FootLeft | The tip of the left foot. |
| 19 | FootRight | The tip of the right foot. |
| 20 | Pelvis | The middle of the hips. |
| 21 | Waist | The middle of the thoracic vertebrae. |
| 22 | Chest | The middle of the sternum. |
| 23 | BigToeLeft | The left big toe. |
| 24 | LittleToeRight | The left little toe. |
| 25 | HeelLeft | The left heel. |
| 26 | BigToeRight | The right big toe. |
| 27 | LittleToeRight | The right little toe. |
| 28 | HeelRight | The right heel. |
| 29 | TopSkull | The top center point of the skull. |
| 30 | BackSkull | The back middle point of the skull. |
| 31 | Xiphoid | The center of the lower part of the sternum. |
| 32 | ClavicleLeft | The middle of the left collarbone. |
| 33 | ClavicleRight | The middle of the right collarbone. |
| 34 | Head | The center of the skull. |