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Frame rate up conversion (FRUC) methods that employ motion have been proven to provide better image quality compared to nonmotion-based methods. While motion-based methods improve the quality of interpolation, artifacts are introduced in the presence of incorrect motion vectors. In this paper, we study the design problem of optimal temporal interpolation(More)
In this paper, the effect of motion vector accuracy on the efficiency of motion compensated frame rate up conversion (MC-FRUC) is studied. The motion vector processing problem is formulated and analyzed via motion vector modelling. A processing scheme is proposed to improve the interpolated frame quality at the decoder. The practical application of(More)
In this paper, we present theoretical analysis on how the global motion parameter accuracies affect the efficiency of motion compensated video coding. The inaccurate global motion compensation is modelled by introducing probabilistic rotation, scale and translation parameter errors. Approximate expressions that relate the power spectrum of the prediction(More)
This paper proposes a metric to quantify the effect of the video frame loss according to their impact toward perceived temporal quality. This metric utilizes information obtained from pixel domain and particularly aims at measuring the temporal video quality degradation caused by both regular and irregular frame loss. As one application, the proposed(More)
In this paper, we address the problem of standard compliant frame rate up conversion (SC-FRUC) at the decoder by using received motion vectors analysis and processing for low bit rate applications. In the proposed SC-FRUC scheme, the skipped frames are generated at the decoder by using received motion vectors only. We introduce a smooth motion vector(More)
The purpose of this study is to evaluate the effectiveness of endoscopic dacryocystorhinostomy by the posterior lacrimal sac approach without use of lacrimal stents or harvest of mucosal flaps as a valid surgical procedure for the treatment of an obstruction of the lacrimal pathways. A retrospective evaluation was conducted in a cohort of 75 patients(More)
In this paper, we propose a novel motion vector processing (MVP) approach for temporal error concealment (TEC) in mobile video applications. Most existing TEC techniques estimate the lost motion vectors by minimizing a given distortion such as boundary variation or neighbor matching in pixel domain, which requires high power consumption compared to(More)
5 Typically, multimedia-processing algorithms are evaluated using objective metrics or through subjective testing in a controlled environment. However, perceived user experience is psychological in nature and it changes in different environmental conditions and with different multimedia devices. Therefore, new techniques are needed to assess and enhance(More)
This paper presents a new multi-mode video object segmentation scheme to automatically segment head-and-shoulder objects from a video sequence. The proposed system supports two modes of segmentation: intra-mode and inter-mode. The intra-mode segmentation integrates skin detection, facial feature localization and verification, object shape approximation,(More)
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