A GPU-based framework of photometric uniformity for multi-projector tiled display

  • Authors:
  • Guodong Yuan;Kaihuai Qin

  • Affiliations:
  • Department of Computer Science & Tecnology, Tsinghua University, Beijing, China;Department of Computer Science & Tecnology, Tsinghua University, Beijing, China

  • Venue:
  • EGVE'07 Proceedings of the 13th Eurographics conference on Virtual Environments
  • Year:
  • 2007

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Abstract

In this paper, we firstly propose a partial-sampling scheme to measure the intensity transfer function of a projector. Secondly, we implement the computation of luminance surface by rendering a texture rectangle on GPU. Thirdly, we generate an unified index data for all projectors. And then we compute the masks of photometric correction using a GPU based on topological consistency. Finally we integrate the masks with a GPU-based photometric correction pipeline to achieve the photometric uniformity for multi-projector display. The GPU-based framework is a combination of the GPU-based computation and the GPU-based photometric correction pipeline, which removes the bottleneck of the computation of luminance surface, attenuation mask and black offset mask. It is shown by experimental results prove that the GPU-based framework is effective and efficient.