3D Hand Tracking Interface for Virtual Object Manipulation
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Solution Overview
Problem
Conventional human machine interfaces, such as keyboards, mice, touch panels, and remote controllers, are inadequate for intuitive 3D object manipulation in virtual environments, as they lack depth cues and spatial constraints, limiting user interaction in three-dimensional spaces.
Innovation Solution
A manual human machine interface system comprising a display unit, data processing unit, image capture units, image analysis unit, coordinate calculation unit, and hand posture recognition unit, which captures hand images, calculates arm feature points, and recognizes hand postures to determine instructions for selecting, grabbing, and releasing objects with depth parameters, allowing users to interact with virtual objects using arm and palm movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional interfaces (keyboard, mouse, touch panel, remote controller) are used for operation, then data typing or basic control functions are achieved, but intuitive 3D object manipulation and spatial interaction are not possible
Solution Approach 1:
The patent transitions from 2D interface interaction to 3D spatial interaction by using multiple image capture units to track hand and arm positions in three-dimensional space. The system calculates arm extension lines and determines object selection based on depth parameters and spatial coordinates, enabling natural 3D manipulation without conventional 2D input devices.
Solution Approach 2:
The patent replaces mechanical input devices (keyboard, mouse, touch panel) with an optical-based hand tracking system. Image capture units capture hand images, and the system processes these images to determine hand postures and arm movements, substituting physical mechanical interaction with optical field-based detection and computational analysis.
2Ease of operation
If touch panel is used for operation, then direct touch interaction is achieved, but user movement is limited to reach distance of the panel
Solution Approach 1:
The system extends interaction beyond the physical touch panel surface by capturing hand images from multiple viewpoints and calculating three-dimensional arm extension lines. This allows users to interact with objects displayed at any position on the screen without physically reaching the panel, as the system determines object selection based on projected arm trajectories in 3D space.
3Ease of operation
If mouse or remote controller is used for operation, then device control is achieved, but user must hold the device continuously during operation
Solution Approach 1:
The system uses the user's own hand and arm as the input device, eliminating the need for external controllers. The image capture units capture images of the user's hand, and the system processes these images to determine hand postures and arm movements, allowing the user's body to serve as the control interface without requiring additional handheld devices.
Solution Approach 2:
The patent replaces mechanical handheld controllers with an optical-based hand tracking system. Instead of requiring users to hold and manipulate physical devices, the system uses image capture units to detect hand positions and postures, converting optical information into control signals for interface manipulation.
Data Source
AI summary
A manual human machine interface operation system and method thereof are disclosed. In embodiment, this manual human machine interface operation system extracts user's arm image and palm image from the images capture by at least two cameras, and then calculates user's arm coordinate, so that user can select the object shown on the human machine interface by manually using his/her arm. The system then recognizes a hand posture according to the palm image and determines an instruction mapped to this hand posture. This instruction is then performed on the selected object. In embodiment, the hand posture can be a pointing posture, grab posture or a release posture.