A scalable distributed paradigm for multi-user interaction with tiled rear projection display walls

Area of Science:

• Computer Science
• Human-Computer Interaction
• Display Technology

Background:

• Simultaneous multi-user interaction on large tiled displays presents scalability challenges.
• Existing distributed systems lack adaptability across diverse applications and interaction methods.
• Current multi-projector registration techniques are time-consuming and prone to inaccuracies.

Purpose of the Study:

• To develop a novel distributed paradigm for scalable, simultaneous multi-user interaction on large tiled rear projection display walls.
• To enhance the adaptability of distributed display systems for various applications and interaction modalities.
• To improve the efficiency and accuracy of distributed multi-projector registration.

Main Methods:

• A distributed system architecture with well-compartmented, application-independent, and application-specific modules.
• Demonstration of scalability across four 2D applications (map visualization, virtual graffiti, virtual bulletin board, emergency management system) on a nine-projector display.
• Implementation of gesture-based and laser-based user interfaces to show modality scalability.
• A new single-pattern-based projector registration method using augmented QR codes, achieving constant time complexity.
• A novel radially cascading geometric registration technique for improved accuracy.

Main Results:

• The proposed paradigm demonstrates significant application scalability and adaptability to different interaction modalities.
• The new projector registration method achieves constant time complexity, a substantial improvement over logarithmic time methods.
• The radially cascading geometric registration technique significantly enhances registration accuracy compared to previous approaches.
• The system enables efficient and accurate distributed self-registration of multi-projector display walls.

Conclusions:

• The developed distributed paradigm offers a scalable and adaptable solution for multi-user interaction on large tiled displays.
• The novel registration techniques provide a more efficient and accurate method for multi-projector display wall setup.
• This work advances the field of large-scale interactive display systems, enabling broader application and improved user experience.