CHI '92 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
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
Pre-emptive shadows: eliminating the blinding light from projectors
CHI '02 Extended Abstracts on Human Factors in Computing Systems
LAM: luminance attenuation map for photometric uniformity in projection based displays
VRST '02 Proceedings of the ACM symposium on Virtual reality software and technology
PixelFlex: a reconfigurable multi-projector display system
Proceedings of the conference on Visualization '01
Dynamic shadow removal from front projection displays
Proceedings of the conference on Visualization '01
Scalable alignment of large-format multi-projector displays using camera homography trees
Proceedings of the conference on Visualization '02
The Interactive Workspaces Project: Experiences with Ubiquitous Computing Rooms
IEEE Pervasive Computing
Tutorial: Introduction to Building Projection-based Tiled Display Systems
IEEE Computer Graphics and Applications
Building and Using A Scalable Display Wall System
IEEE Computer Graphics and Applications
The Everywhere Displays Projector: A Device to Create Ubiquitous Graphical Interfaces
UbiComp '01 Proceedings of the 3rd international conference on Ubiquitous Computing
Color Nonuniformity in Projection-Based Displays: Analysis and Solutions
IEEE Transactions on Visualization and Computer Graphics
Camera-Based Detection and Removal of Shadows from Interactive 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
UIST '06 Proceedings of the 19th annual ACM symposium on User interface software and technology
ShaderX2: Shader Programming Tips and Tricks with DirectX 9.0
ShaderX2: Shader Programming Tips and Tricks with DirectX 9.0
To frame or not to frame: the role and design of frameless displays in ubiquitous applications
UbiComp'05 Proceedings of the 7th international conference on Ubiquitous Computing
UIST '06 Proceedings of the 19th annual ACM symposium on User interface software and technology
Eye-Shield: protecting bystanders from being blinded by mobile projectors
Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces
Fast high-resolution appearance editing using superimposed projections
ACM Transactions on Graphics (TOG)
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A major problem with interactive displays based on front projection is that users cast undesirable shadows on the display surface. This paper demonstrates that shadows can be muted by redundantly illuminating the display surface using multiple projectors, all mounted at different locations. However, this technique alone does not eliminate shadows: Multiple projectors create multiple dark regions on the surface (penumbral occlusions) and cast undesirable light onto the users. These problems can be solved by eliminating shadows and suppressing the light that falls on occluding users by actively modifying the projected output. This paper categorizes various methods that can be used to achieve redundant illumination, shadow elimination, and blinding light suppression and evaluates their performance.