Geometric Modeling and Calibration of Planar Multi-Projector Displays Using Rational Bezier Patches

In order to achieve seamless imagery in a planar multiprojector display, geometric distortions and misalignment of images within and across projectors have to be removed. Camera-based calibration methods are popular for achieving this in an automated fashion. Previous methods for geometric calibration fall into two categories: (a) Methods that model the geometric function relating the projectors to cameras using simple linear models, like homography, to calibrate the display. These models assume perfect linear devices and cannot address projector non-linearities, like lens distortions, which are common in most commodity projectors. (b) Methods that use piecewise linear approximations to model the relationship between projectors and cameras. These require a dense sampling of the function space to achieve good calibration. In this paper, we present a new closed-form model that relates projectors to cameras in planar multi-projector displays, using rational Bezier patches. This model ove...

• Type: Conference
• Year: 2007
• Where: CVPR
• Authors: Ezekiel S. Bhasker, Aditi Majumder
• Keywords: Accurate Geometric Calibration, Camera-based Calibration Methods, Commodity Projectors, Computer Vision, CVPR 2007, Geometric Calibration Fall, Geometric Distortions