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PROJECT TITLE :

An Optical Flow-Based Full Reference Video Quality Assessment Algorithm

ABSTRACT:

We tend to present a easy yet effective optical flow-primarily based full-reference video quality assessment (FR-VQA) algorithm for assessing the perceptual quality of natural videos. Our algorithm relies on the premise that native optical flow statistics are full of distortions and also the deviation from pristine flow statistics is proportional to the quantity of distortion. We tend to characterize the native flow statistics using the mean, the standard deviation, the coefficient of variation (CV), and also the minimum eigenvalue ( ) of the native flow patches. Temporal distortion is estimated as the change in the CV of the distorted flow with respect to the reference flow, and the correlation between of the reference and of the distorted patches. We rely on the sturdy multi-scale structural similarity index for spatial quality estimation. The computed temporal and spatial distortions, therefore, are then pooled employing a perceptually motivated heuristic to come up with a spatio-temporal quality score. The proposed technique is shown to be competitive with the state-of-the-art when evaluated on the LIVE SD database, the EPFL Polimi SD database, and also the LIVE Mobile HD database. The distortions considered in these databases embody those thanks to compression, packet-loss, wireless channel errors, and rate-adaptation. Our algorithm is versatile enough to allow for any sturdy FR spatial distortion metric for spatial distortion estimation. Further, the proposed technique isn't solely parameter-free but conjointly freelance of the choice of the optical flow algorithm. Finally, we tend to show that the replacement of the optical flow vectors in our proposed technique with the a lot of coarser block motion vectors additionally leads to an acceptable FR-VQA algorithm. Our algorithm is named the flow similarity index.


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