Publications

This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.

Search for Publication


Year(s) from:  to 
Author:
Keywords (separated by spaces):

Automatic Interactive Calibration of Multi-Projector-Camera Systems

Andreas Griesser and Luc Van Gool
Conference on Computer Vision and Pattern Recognition Workshop, PROCAMS
June 2006

Abstract

This paper presents a novel interactive Projector Calibration for arbitrary Multi-Projector-Camera environments. The method does not require any calibration rig and is not restricted to any special arrangement of the display devices. The cameras in the system need to be pre-calibrated so that a common world coordinate system can be defined. Each projector is sequentially activated and a series of self-identifying tags is generated. These tags are accurately and robustly detected and must be seen by a minimum subset of the cameras. This is achieved by freely moving a target object, i.e. a sheet of paper, onto which the tags are projected. Point correspondences for each tag in three-space are computed by minimizing the reprojection errors in the relevant images and eliminating potential outliers. If a tag has been seen a sufficient number of times, it is masked out in the display so that a visual feedback of the current detection state is given to the user. The resulting 3D-point cloud coupled with the known 2D tag-position in the projector frame serves as input for a nonlinear optimization of the projector's intrinsic and extrinsic parameters as well as distortion factors. We show that the overall procedure takes less than a minute and results in low reprojection errors.


Download in pdf format
@InProceedings{eth_biwi_00396,
  author = {Andreas Griesser and Luc Van Gool},
  title = {Automatic Interactive Calibration of Multi-Projector-Camera Systems},
  booktitle = {Conference on Computer Vision and Pattern Recognition Workshop, PROCAMS},
  year = {2006},
  month = {June},
  keywords = {interactive projector camera calibration}
}