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Video Super-Resolution Using Simultaneous Motion and Intensity Calculations

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3 Author(s)
Keller, S.H. ; PET Center, Copenhagen Univ. Hosp., Copenhagen, Denmark ; Lauze, F. ; Nielsen, M.

In this paper, we propose an energy-based algorithm for motion-compensated video super-resolution (VSR) targeted on upscaling of standard definition (SD) video to high-definition (HD) video. Since the motion (flow field) of the image sequence is generally unknown, we introduce a formulation for the joint estimation of a super-resolution (SR) sequence and its flow field. Via the calculus of variations, this leads to a coupled system of partial differential equations for image sequence and motion estimation. We solve a simplified form of this system and, as a by-product, we indeed provide a motion field for super-resolved sequences. To the best of our knowledge, computing super-resolved flows has not been done before. Most advanced SR methods found in literature cannot be applied to general video with arbitrary scene content and/or arbitrary optical flows, as it is possible with our simultaneous VSR method. A series of experiments shows that our method outperforms other VSR methods when dealing with general video input and that it continues to provide good results even for large scaling factors up to 8 × 8.

Published in:

Image Processing, IEEE Transactions on  (Volume:20 ,  Issue: 7 )

Date of Publication:

July 2011

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