PixelFlex: A Spatially Reconfigurable, Multiprojector Display System

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PixelFlex A Spatially Reconfigurable,
Multi-projector Display System

• Justin Hensley, Andrew Raij, Gennette Gill, Aditi
  Majumder, Herman Towles and Henry Fuchs

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PixelFlex Conceptual Design

• Ceiling-mounted, front projectors
• Casual, overlapped alignment
• Allows for installation in offices and small
  meeting rooms
• Cameras used for automatic, closed-loop
  calibration
• Display calibration performed automatically

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PixelFlex Projector Array Setup

• Projector array driven by a Linux PC cluster
• Single Master Node
• 1 Rendering node per projector w/ Nvidia Graphics
• Installations
• 8 projector array at UNC Chapel Hill
• 6 projector array at Sandia National Labs,
  California

Projector setup at UNC Chapel Hill
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PixelFlex Implementation

• Closed-loop calibration
• Computes homography to correct for geometric
  keystoning
• Computes photometric blending functions
• (work in progress)
• Chromium port
• Allows most OpenGL programs to run unaltered
• PxFx library
• Custom API for displaying on PixelFlex

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PixelFlex Example Configurations
4x2 Configuration
Stacked Configuration
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PixelFlex Example Configurations
3x1 Configuration