Iterative image warping

Bowles, Huw; Mitchell, Kenneth; Sumner, Robert; Moore, Jeremy; Gross, Markus

Abstract

Animated image sequences often exhibit a large amount of inter-frame coherence which standard rendering algorithms and pipelines are ill-equipped to exploit, limiting their efficiency. To address this inefficiency we transfer rendering results across frames using a novel image warping algorithm based on fixed point iteration. We analyze the behavior of the iteration and describe two alternative algorithms designed to suit different performance requirements. Further, to demonstrate the versatility of our approach we apply it to a number of spatio-temporal rendering problems including 30-to-60Hz frame upsampling, stereoscopic 3D conversion, defocus and motion blur. Finally we compare our approach against existing image warping methods and demonstrate a significant performance improvement.

Citation

Bowles, H., Mitchell, K., Sumner, R., Moore, J., & Gross, M. (2012). Iterative image warping. Computer Graphics Forum, 31, 237-246. https://doi.org/10.1111/j.1467-8659.2012.03002.x

• Journal Article Type: Article
• Publication Date: 2012
• Deposit Date: Sep 24, 2013
• Print ISSN: 0167-7055
• Electronic ISSN: 1467-8659
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 31
• Pages: 237-246
• DOI: https://doi.org/10.1111/j.1467-8659.2012.03002.x
• Keywords: Computer graphics; image-based rendering; warping algorithm; 30-to-60Hz frame upsampling; stereoscopic 3D conversion
• Public URL: http://researchrepository.napier.ac.uk/id/eprint/6374
• Publisher URL: http://dx.doi.org/10.1111/j.1467-8659.2012.03002.x