Landmark-Based Pointer Control for Natural Gesture UI Interaction
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Solution Overview
Problem
Conventional input devices for computing systems constrain user input and require artificial movements, while gesture-based interfaces suffer from limited flexibility, poor accuracy, and a high barrier to entry for inexperienced users.
Innovation Solution
A UI control system that determines landmark locations on a user's body, uses these to create a pointer for interacting with a computing system, allowing natural hand and finger movements to control virtual environments, and supports complex user interface experiences through gesture recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional input devices are used, then device complexity is reduced, but ease of operation deteriorates due to constrained input range and artificial movements required
Solution Approach 1:
The patent replaces conventional mechanical input devices (mouse, keyboard) with a camera-based optical system that tracks body landmarks. The camera captures video frames, detects landmark positions, and translates natural body movements into cursor control, eliminating the need for physical input devices and artificial movement patterns.
2Ease of operation
If gesture-based interfaces are used, then ease of operation improves through natural movements, but measurement precision deteriorates due to poor accuracy
Solution Approach 1:
The patent segments the body into multiple trackable landmarks (joints, fingertips, nose) rather than treating the body as a single object. By tracking multiple discrete points and using them to determine cursor position through geometric calculations, the system achieves higher precision while maintaining natural gesture-based operation.
Solution Approach 2:
The patent introduces an intermediary computational model that maps landmark positions to cursor position. Instead of directly using raw gesture data, the system calculates virtual landmark positions based on geometric relationships between tracked body points, thereby improving measurement precision while preserving natural movement input.
3Adaptability or versatility
If gesture-based interfaces are used, then adaptability improves through flexible input methods, but device complexity increases due to system sophistication
Solution Approach 1:
The patent creates a universal input system that can interpret multiple types of natural movements (hand gestures, arm movements, head movements) through a single camera-based platform. The landmark tracking system adapts to different body configurations and gesture types without requiring separate hardware or complex device variants, achieving versatility through a unified approach.
4Measurement precision
If landmark-based pointer system is used, then measurement precision improves for UI element identification, but device complexity increases due to processing requirements
Solution Approach 1:
The patent performs preliminary calculations to establish virtual landmark positions and geometric relationships before they are needed for precise UI element identification. By pre-computing the mapping between body landmarks and cursor position, and by establishing the geometric model in advance, the system reduces real-time processing complexity while maintaining high measurement precision during actual interaction.
Data Source
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AI summary
Embodiments of systems and techniques for user interface (UI) control are disclosed herein. In some embodiments, a UI control system may determine locations of landmarks on a body of a user of a computing system, determine a pointer based at least in part on the landmark locations, and identify a UI element of an UI of the computing system based at least in part on the pointer. Other embodiments may be described and/or claimed.