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 pelvic girdle. |
| 21 | Waist | The middle of the lumbar vertebrae. |
| 22 | Chest | The middle of the thoracic vertebrae. |
| 23 | BigToeLeft | The tip of the left big toe. |
| 24 | LittleToeRight | The tip of the left little toe. |
| 25 | HeelLeft | The tip of the left heel. |
| 26 | BigToeRight | The tip of the right big toe. |
| 27 | LittleToeRight | The tip of the right little toe. |
| 28 | HeelRight | The tip of 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 edge of the left collarbone closer to the spine. |
| 33 | ClavicleRight | The edge of the right collarbone closer to the spine. |
| 34 | Head | The center of the skull. |