HumanHandPoseObservation.JointName.thumbIP A joint name that represents the thumb’s interphalangeal (IP) joint. Declarationcase thumbIP See AlsoGetting the thumb finger joint nameHumanHandPoseObservation.JointName.thumbCMCHumanHandPoseObservation.JointName.thumbMPHumanHandPoseObservation.JointName.thumbTip