This paper presents a motion estimation and correction technique for the realization of synthetic-aperture sonar imaging. It utilizes the redundancy provided by the multiple-element receiver array and physical-array sub-images are used for the estimate the motion errors between adjacent receiver positions in the form of phase errors. Subsequently, motion errors can be corrected accordingly by m...

The modeling of human characters consists of two distinguished processes, namely the definition of 3D shape and 3D movement of the body. To achieve realism, both shape and motion information should be acquired from real persons. The two procedures are usually considered separately, by using full body scanners and motion capture systems. In this paper, we report about deterministic methods devel...

This paper presents a method for video sequence coding, using motion estimation over a triangular object-based mesh. We introduce a novel “crack line” notion to deal with motion discontinuities and to improve representation scalability. The optimization of the nodal motion vectors is performed by means of a multi-resolution differential method, further improved by “backward in forward” tracking...

Positron Emission Tomography (PET) is a nuclear imaging technique of increasing importance e.g. in cardiovascular investigations. However, cardiac and respiratory motion of the patient degrade the image quality due to acquisition times in the order of minutes. Reconstructions without motion compensation are prone to spatial blurring and affected attenuation correction. These effects can be redu...

Video compression technology is the research field of video compression coding attention. It mainly includes the elimination of temporal redundancy and spatial redundancy elimination algorithm, this paper mainly focuses on the study of motion estimation and compensation algorithm to eliminate the temporal redundancy. The starting point of this article is how to improve the precision and the sub...

In the heavy ion therapy project at GSI a C ion beam is used to apply extremely volume conformal dose distributions to cancer patients. Volume conformity means that the dose distribution is shaped precisely to the contours of the tumour taking into account all medical needs. This is achieved by dividing the target volume into small subvolumes (voxels) and optimizing the number of particles per ...

Compared with spatial domain motion compensated temporal filtering (MCTF) scheme, in-band MCTF scheme needs more coding bits for motion information since the motion estimation (ME) and motion compensation (MC) are implemented on each spatial subband. Therefore, how to employ motion prediction and coding is a key problem to improve the coding efficiency of in-band MCTF. In this paper, we propose...

In this paper we present a new method for extracting spatialtemporal features of dynamic gestures. We fully utilize the information of temporal motion and spatial luminance. In the first two consecutive frame the dominant motion model is used to calculate the gesturing motion, then it is combined with the result of static segmentation to segment the gesturing hand or arm from the background. Th...

A model-based method is proposed in this paper for 3-dimensional human motion recovery, taking un-calibrated monocular data as input. The proposed method is able to generate smooth human motions that resemble the original motion from the same viewpoint the sequence was taken, and look continuous from any other viewpoint. The core of the proposed system is the motion trend prediction for reconst...

In this paper we introduce two techniques that can be used together to improve video coding performance. Firstly, block matching motion estimation with spatial transformation (BMST) is used to increase motion compression eeciency, and then motion compensated prediction (MCP) errors are encoded using a hybrid Fractal/DCT scheme. MCP error blocks are classiied according to their energy content an...