In this paper, a new mesh based algorithm is applied for motion estimation and compensation in the wavelet domain. The first major contribution of this work is the introduction of a new active mesh based method for motion estimation and compensation. The proposed algorithm is based on the mesh energy minimization with novel sets of energy functions. The proposed energy functions have appropriat...

Long-term memory prediction extends the spatial displacement vector utilized in hybrid video coding by a variable time delay permitting the use of more than one reference frame for motion compensation. This extension provides improved rate-distortion performance. However, motion compensation in combination with transmission errors leads to temporal error propagation that occurs when the referen...

In this paper, we describe a method for estimating and compensating 3D camera motion in image sequences for the applications to the video coding system. To improve the estimation accuracy of the global motion parameter, we propose a robust algorithm which selects the reliable observation points adaptively and eliminates the bad observation points effectively. Unlike the existing linear recursiv...

In this paper, we present a new approach for tracking targets in forward-looking infrared (FLIR) imagery taken from an airborne, moving platform. Our tracking approach uses the target intensity and the Gabor response distributions and computes a likelihood measure between the candidate and the model distributions by evaluating the Mean Shift Vector. When the Mean Shift Vector based tracker fail...

Prospective right hemidiaphragm navigator (NAV) is commonly used in free-breathing coronary MRI. The NAV results in an increase in acquisition time to allow for resampling of the motion-corrupted k-space data. In this study, we are presenting a joint prospective-retrospective NAV motion compensation algorithm called compressed-sensing motion compensation (CosMo). The inner k-space region is acq...

The latest H.264/AVC video compression standard promises significantly higher compression efficiency than prior standards. H.264/AVC achieves coding gains through a rich set of advanced coding tools including variable block size motion compensation, quarter-pel motion compensation and long-term memory motion compensation [1]. However, with so many coding options available, it has become extreme...

In this paper, new techniques for deformed image motion estimation and compensation using variable-size block-matching are proposed, which can be applied to an image sequence compression system or a moving object recognition system. The motion estimation and compensation techniques have been successfully applied in the area of image sequence coding. Many research papers on improving the perform...

Introduction: In MRI with continuously moving table (CMT-MRI) the compensation of breathing motion is a difficult problem. Existing breathing motion compensation techniques for CMT-MRI are either limited to TSE-based sequences where motion consistent snapshots are acquired with one single echo train [1,2], or they apply respiratory gating [3]. The latter approach can fail, however, if the true ...

Block-based motion compensation fails to maintain an acceptable level of prediction error which makes the transmission of this error impossible for very low bitrate coding owing to the small bit allocation. The reason is that the motion model assumed in block-based techniques cannot approximate the motion in the real world precisely. To develop an e ective motion compensation method for very lo...

This paper proposes a local motion-based approach for recognizing group activities in soccer videos. Given the SIFT keypoint matches on two successive frames, we propose a simple but effective method to group these keypoints into the background point set and the foreground point set. The former one is used to estimate camera motion and the latter one is applied to represent group actions. After...