Multiresolution motion estimation for low-rate video frame interpolation
EURASIP Journal on Applied Signal Processing
Motion-Compensated Frame Interpolation for Intra-Mode Blocks
IEICE - Transactions on Information and Systems
A spatio-temporal auto regressive model for frame rate upconversion
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Image Processing
Double up-conversion of video frame rate based on bidirectional motion compensation
Programming and Computing Software
Journal of Signal Processing Systems
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We consider the problems of motion-compensated frame interpolation (MCFI) and bidirectional prediction in a video coding environment. These applications generally require good motion estimates at the decoder. We use a multiscale optical-flow-based motion estimator that provides smooth, natural motion fields under bit-rate constraints. These motion estimates scale well with change in temporal resolution and provide considerable flexibility in the design and operation of coders and decoders. In the MCFI application, this estimator provides excellent interpolated frames that are superior to those of conventional motion estimators, both visually and in terms of peak signal-to-noise ratio (PSNR). We also consider the effect of occlusions in the bidirectional prediction application and introduce a dense label field that complements our motion estimator. This label field enables us to adaptively weight the forward and backward predictions and gives us substantial visual and PSNR improvements in the covered/uncovered regions of the sequence