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A Unified Panoramic Stitching and Multi-Projector Rendering Scheme for Immersive Panoramic Displays
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- Authors
- Saleh Saeed, Rehan Hafiz, Ashar Rasul, Muhammad Murtaza Khan, Yongju Cho, Unsang Park, Jihun Cha
- Issue Date
- 2015-12
- Citation
- Displays, v.40, pp.78-87
- ISSN
- 0141-9382
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- Panoramic videos provide a high resolution wide-angle field of view to audience. The rendering of such panoramic videos on large multi-projector curved displays further enhances the experience by providing them an immersive visual environment. Immersive panoramic projection thus comprise of three steps: acquisition of videos, stitching of video frames and their projection using multi-projector display system. Both panoramic stitching and multi-projector rendering require compute intensive geometric and photometric transformations that have to be applied for each frame of a video during stitching as well as rendering process. In this paper, we propose a unified scheme that handles these two separate geometric transformations using a single, combined Look up Table (LUT). The scheme allows projection of planar and cylindrical panoramas on curved cylindrical displays. Experimental results show that the proposed scheme provides a speedup of up to 73% and 83% for projector resolutions of HD and 4K respectively, for a two-camera two-projector panoramic display system. Furthermore, for a 4K projector, the proposed scheme requires 2.278 ms for the geometric transformation of its content, thus enabling real time panoramic video projection.