Name
Abstract | ||
|---|---|---|
In this paper, we present a novel technique to calibrate multiple casually aligned projectors on fiducial-free piecewise smooth vertically extruded surfaces using a single camera. Such surfaces include cylindrical displays and CAVEs, common in immersive virtual reality systems. We impose two priors to the display surface. We assume the surface is a piecewise smooth vertically extruded surface for which the aspect ratio of the rectangle formed by the four corners of the surface is known and the boundary is visible and segmentable. Using these priors, we can estimate the display's 3D geometry and camera extrinsic parameters using a nonlinear optimization technique from a single image without any explicit display to camera correspondences. Using the estimated camera and display properties, the intrinsic and extrinsic parameters of each projector are recovered using a single projected pattern seen by the camera. This in turn is used to register the images on the display from any arbitrary viewpoint making it appropriate for virtual reality systems. The fast convergence and robustness of this method is achieved via a novel dimension reduction technique for camera parameter estimation and a novel deterministic technique for projector property estimation. This simplicity, efficiency, and robustness of our method enable several coveted features for nonplanar projection-based displays. First, it allows fast recalibration in the face of projector, display or camera movements and even change in display shape. Second, this opens up, for the first time, the possibility of allowing multiple projectors to overlap on the corners of the CAVE—a popular immersive VR display system. Finally, this opens up the possibility of easily deploying multiprojector displays on aesthetic novel shapes for edutainment and digital signage applications. |
Year | DOI | Venue |
|---|---|---|
2011 | 10.1109/TVCG.2011.33 | IEEE Trans. Vis. Comput. Graph. |
Keywords | Field | DocType |
cylindrical display,extruded surfaces,piecewise smooth vertically,tiled projectors,display surface,nonplanar projection-based display,display shape,camera correspondence,display property,multiprojector display,popular immersive vr display,explicit display,extruded surface,optimization,registers,shape,parameter estimation,caves,three dimensional,geometry,surface reconstruction,calibration,image segmentation,virtual reality,shape optimization,image registration | Computer vision,Surface reconstruction,Virtual reality,Computer graphics (images),Computer science,Rectangle,Robustness (computer science),Projector,Image segmentation,Artificial intelligence,Piecewise,Image registration | Journal |
Volume | Issue | ISSN |
17 | 9 | 1077-2626 |
Citations | PageRank | References |
3 | 0.52 | 17 |
Authors | ||
2 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Behzad Sajadi | 1 | 158 | 11.80 |
| Aditi Majumder | 2 | 788 | 62.12 |