Calibrating multi-projector cylindrically curved displays for "wallpaper" projection
PROCAMS '08 Proceedings of the 5th ACM/IEEE International Workshop on Projector camera systems
Camera and projector arrays for immersive 3D video
Proceedings of the 2nd International Conference on Immersive Telecommunications
Geometric calibration of projector imagery on curved screen based-on subdivision mesh
GMP'08 Proceedings of the 5th international conference on Advances in geometric modeling and processing
Automatic registration of multiple projectors on swept surfaces
Proceedings of the 17th ACM Symposium on Virtual Reality Software and Technology
Scalable multi-view registration for multi-projector displays on vertically extruded surfaces
EuroVis'10 Proceedings of the 12th Eurographics / IEEE - VGTC conference on Visualization
Automatic registration of multi-projector domes using a single uncalibrated camera
EuroVis'11 Proceedings of the 13th Eurographics / IEEE - VGTC conference on Visualization
Augmenting physical avatars using projector-based illumination
ACM Transactions on Graphics (TOG)
Geometric and colorimetric error compensation for multi-view images
Journal of Visual Communication and Image Representation
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We describe a novel, practical method to create largescale, immersive displays by tiling multiple projectors on curved screens. Calibration is performed automatically with imagery from a single uncalibrated camera, without requiring knowledge of the 3D screen shape. Composition of 2D-mesh-based coordinate mappings, from screen-tocamera and from camera-to-projectors, allows image distortions imposed by the screen curvature and camera and projector lenses to be geometrically corrected together in a single non-parametric framework. For screens that are developable surfaces, we show that the screen-to-camera mapping can be determined without some of the complication of prior methods, resulting in a display on which imagery is undistorted, as if physically attached like wallpaper. We also develop a method of photometric calibration that unifies the geometric blending, brightness scaling, and black level offset maps of prior approaches. The functional form of the geometric blending is novel in itself. The resulting method is more tolerant of geometric correction imprecision, so that visual artifacts are significantly reduced at projector edges and overlap regions. Our efficient GPUbased implementation enables a single PC to render multiple high-resolution video streams simultaneously at frame rate to arbitrary screen locations, leaving the CPU largely free to do video decompression and other processing.