Computational projective geometry
CVGIP: Image Understanding
Surround-screen projection-based virtual reality: the design and implementation of the CAVE
SIGGRAPH '93 Proceedings of the 20th annual conference on Computer graphics and interactive techniques
Three-dimensional computer vision: a geometric viewpoint
Three-dimensional computer vision: a geometric viewpoint
High fidelity for immersive displays
Conference Companion on Human Factors in Computing Systems
Load balancing for multi-projector rendering systems
HWWS '99 Proceedings of the ACM SIGGRAPH/EUROGRAPHICS workshop on Graphics hardware
Emancipated pixels: real-world graphics in the luminous room
Proceedings of the 26th annual conference on Computer graphics and interactive techniques
Multi-projector displays using camera-based registration
VIS '99 Proceedings of the conference on Visualization '99: celebrating ten years
A distributed graphics system for large tiled displays
VIS '99 Proceedings of the conference on Visualization '99: celebrating ten years
Achieving color uniformity across multi-projector displays
Proceedings of the conference on Visualization '00
Toward a compelling sensation of telepresence: demonstrating a portal to a distant (static) office
Proceedings of the conference on Visualization '00
Tutorial: Introduction to Building Projection-based Tiled Display Systems
IEEE Computer Graphics and Applications
High-Resolution Multiprojector Display Walls
IEEE Computer Graphics and Applications
Automatic Alignment Of High-Resolution Multi-Projector Displays Using An Un-Calibrated Camera
VISUALIZATION '00 Proceedings of the 11th IEEE Visualization 2000 Conference (VIS 2000)
Scalable self-calibrating display technology for seamless large-scale displays
Scalable self-calibrating display technology for seamless large-scale displays
The Metaverse: a networked collection of inexpensive, self-configuring, immersive environments
EGVE '03 Proceedings of the workshop on Virtual environments 2003
iLamps: geometrically aware and self-configuring projectors
ACM SIGGRAPH 2003 Papers
Camera-Based Detection and Removal of Shadows from Interactive Multiprojector Displays
IEEE Transactions on Visualization and Computer Graphics
Multi-projectors and implicit interaction in persuasive public displays
Proceedings of the working conference on Advanced visual interfaces
Camera-Based Calibration Techniques for Seamless Multiprojector Displays
IEEE Transactions on Visualization and Computer Graphics
Virtual rear projection: do shadows matter?
CHI '05 Extended Abstracts on Human Factors in Computing Systems
Hierarchical shadow detection for color aerial images
Computer Vision and Image Understanding
Mnemonic rendering: an image-based approach for exposing hidden changes in dynamic displays
UIST '06 Proceedings of the 19th annual ACM symposium on User interface software and technology
GVU-PROCAMS: enabling novel projected interfaces
MULTIMEDIA '06 Proceedings of the 14th annual ACM international conference on Multimedia
iLamps: geometrically aware and self-configuring projectors
ACM SIGGRAPH 2006 Courses
iLamps: geometrically aware and self-configuring projectors
SIGGRAPH '05 ACM SIGGRAPH 2005 Courses
Shadow Elimination and Blinding Light Suppression for Interactive Projected Displays
IEEE Transactions on Visualization and Computer Graphics
The visual computing of projector-camera systems
ACM SIGGRAPH 2008 classes
Feasibility of the living canvas: restricting projection to a performer on stage
MM '08 Proceedings of the 16th ACM international conference on Multimedia
Hierarchical shadow detection for color aerial images
Computer Vision and Image Understanding
EUC'06 Proceedings of the 2006 international conference on Embedded and Ubiquitous Computing
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Front-projection display environments suffer from a fundamental problem: users and other objects in the environment can easily and inadvertently block projectors, creating shadows on the displayed image. We introduce a technique that detects and corrects transient shadows in a multi-projector display. Our approach is to minimize the difference between predicted (generated) and observed (camera) images by continuous modification of the projected image values for each display device. We are unaware of any other technique that directly addresses this problem. Furthermore, we speculate that the general predictive monitoring framework introduced here is capable of addressing more general radiometric consistency problems such as display-surface inter-reflections and the changes in display color and intensity due to projector bulb temperature variation.Using an automatically-derived relative position of cameras and projectors in the display environment and a straightforward color correction scheme, the system renders an expected image for each camera location. Cameras observe the displayed image, which is compared with the expected image to detect shadowed regions. These regions are transformed to the appropriate projector frames, where corresponding pixel values are increased. In display regions where more than one projector contributes to the image, shadow regions are eliminated. We demonstrate an implementation of the technique to remove shadows in a multi-projector front projection system.