A Curved Ray Camera For Handling Occlusions Through Continuous Multiperspective Visualization

Most images used in visualization are computed with the planar pinhole camera. This classic camera model has important advantages such as simplicity, which enables efficient software and hardware implementations, and similarity to the human eye, which yields images familiar to the user. However, the planar pinhole camera has only a single viewpoint, which limits images to parts of the scene to which there is direct line of sight. In this paper we introduce the curved ray camera to address the single viewpoint limitation. Rays are C1-continuous curves that bend to circumvent occluders. Our camera is designed to provide a fast 3-D point projection operation, which enables interactive visualization. The camera supports both 3-D surface and volume datasets. The camera is a powerful tool that enables seamless integration of multiple perspectives for overcoming occlusions in visualization while minimizing distortions.

Jian Cui, Paul Rosen, Voicu Popescu, and Christoph Hoffmann. A Curved Ray Camera For Handling Occlusions Through Continuous Multiperspective Visualization. IEEE Transactions on Visualization and Computer Graphics (TVCG), 2010.

@article{cui2010curved,
  title = {A Curved Ray Camera for Handling Occlusions through Continuous
    Multiperspective Visualization},
  author = {Cui, Jian and Rosen, Paul and Popescu, Voicu and Hoffmann, Christoph},
  journal = {IEEE Transactions on Visualization and Computer Graphics (TVCG)},
  volume = {16},
  pages = {1235--1242},
  year = {2010},
  keywords = {Alleviating occlusions, camera model, curved rays, multiperspective
visualization, interactive visualization},
  note = {Note Presented at IEEE Visualization 2010 (SciVis).},
  abstract = {Most images used in visualization are computed with the planar pinhole
    camera. This classic camera model has important advantages such as simplicity, which
    enables efficient software and hardware implementations, and similarity to the human
    eye, which yields images familiar to the user. However, the planar pinhole camera has
    only a single viewpoint, which limits images to parts of the scene to which there is
    direct line of sight. In this paper we introduce the curved ray camera to address the
    single viewpoint limitation. Rays are C1-continuous curves that bend to circumvent
    occluders. Our camera is designed to provide a fast 3-D point projection operation,
    which enables interactive visualization. The camera supports both 3-D surface and volume
    datasets. The camera is a powerful tool that enables seamless integration of multiple
    perspectives for overcoming occlusions in visualization while minimizing distortions.}
}