Multi-Hypothesis motion compensated filter (MHMCF) utilizes a number of hypotheses (temporal predictions) to estimate the current pixel which is corrupted with noise. While showing remarkable denoising results, MHMCF is computationally intensive as full search is employed in the expectation of finding good temporal predictions in the presence of noise. In the frame of MHMCF, a fast denoising algorithm FMHMCF is proposed in this paper. With edge preserved low-pass prefiltering and noise-robust fast multihypothesis search, FMHMCF could find reliable hypotheses while checking very few search locations, so that the denoising process can be dramatically accelerated. Experimental results show that FMHMCF can be 10 to 14 times faster than MHMCF, while achieving the same or even better denoising performance with up to 1.93 dB PSNR (peak-signal-noise-ratio) improvement.
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This work has been supported in part by the Innovation and Technology Commission of the Hong Kong Special Administrative Region, China (project no GHP/048/08) and the Hong Kong Applied Science and Technology Research Institute (ASTRI).
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Guo, L., Au, O.C., Ma, M. et al. Fast Multi-Hypothesis Motion Compensated Filter for Video Denoising. J Sign Process Syst 60, 273–290 (2010). https://doi.org/10.1007/s11265-009-0365-0
- Motion compensation
- Spatial filtering
- Temporal filtering
- White noise
- Video signal processing