Hand Tracking Wrist Rotation Scroll Sensitivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hand-based input systems for extended reality (XR) environments suffer from poor scroll sensitivity due to inadequate interpretation of wrist rotation versus arm movements.
Innovation Solution
The system tracks hand motion and interprets it as a scroll by determining scroll momentum, distinguishing between wrist rotation and arm movement, and adjusting sensitivity accordingly, using a device with sensors to obtain positional data for two points on the hand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hand-based input systems track hand motion relative to user's body for 3D object motion, then the system can provide three-dimensional interaction capability, but the scroll sensitivity deteriorates due to poor interpretation of wrist rotation versus arm movements
Solution Approach 1:
The system segments hand motion into two distinct components: wrist rotation (local motion) and arm movement (global motion). By tracking two points on the hand (wrist joint and pinch centroid) and analyzing their relative movements, the system can differentiate between scrolling gestures (wrist rotation) and navigation gestures (arm movement), thereby improving scroll sensitivity while maintaining 3D interaction capability
Solution Approach 2:
The system introduces an intermediary analysis layer that processes the motion data between the sensors and the final gesture interpretation. This intermediary layer calculates the contribution of wrist rotation versus arm movement to the overall hand motion, enabling accurate differentiation of gesture types and improving scroll detection precision without sacrificing 3D interaction versatility
Data Source
AI summary
Various implementations track hand motion to interpret a scroll movement. For example, an example process may include obtaining sensor data associated with a hand via one or more sensors in a physical environment. The process may further include determining positional data corresponding to three-dimensional (3D) positions of two points on the hand based on the sensor data. The process may further include determining whether a movement of the hand includes a wrist rotation associated with the hand rotating about the wrist, an arm motion associated with movement of the arm, or a combination of the wrist rotation and the arm motion. The process may further include determining the movement of the hand as a user interaction event based on the positional data and whether the movement of the hand includes the wrist rotation, the arm motion, or a combination of the wrist rotation and the arm motion.