30198837
Scalable Stereo Video Coding for Heterogeneous Environments
In this paper, we propose a new stereo video coding scheme for heterogeneous consumer devices by exploiting the concept of spatio-temporal scalability. We use MPEG standard for coding the main sequence and interpolative prediction scheme for predicting the P- and B-type pictures of the auxiliary sequence. The interpolative scheme predicts matching blocks by interpolating both motion predicted macro-block and disparity predicted macro-block and employs weighting factors to minimize the residual errors. To provide flexible stereo video service, we define both a temporally scalable layer and a spatially scalable layer for each eye’s view. The experimental results show the efficiency of proposed scheme by comparison with already known methods and advantages of disparity estimation in the view of scalability overhead. According to the experimental results, we expect the proposed functionalities will play a key role in establishing highly flexible stereo video service for ubiquitous display environment where device and network connections are heterogeneous.
21778074
Dream of Mee-Luck: Aspiration for a New Dawn
Many countries in the world are putting much effort for the preservation of cultural assets of their own countries using digital. However, most of the attempts are based on the aspect of preservation science which aims to exquisitely restore cultural assets through historical investigation. Therefore in most cases they are successful in the restoration of shape without incorporating the spirit and meaning of the respective cultural asset. In this regard, we suggest an approach using Responsive Multimedia System which can present legend of Unju Temple as a sequence of events in VE. Users can experience virtual story by manipulating interactive StoryMap displayed on ARTable. In the suggested artwork, we express the uncompleted beauty, which we cannot find out from Unju Temple today.
1468385
Narrative abstraction model for story-oriented video
TV program review services, especially drama review services, are one of the most popular video on demand services on the Web. In this paper, we propose a novel video abstraction model for a review service of story-oriented video such as dramas. In a drama review service, viewers want to understand the story in a short time and service providers want to provide video abstracts at minimum cost. The proposed model enables the automatic creation of a video abstract that still allows viewers to understand the overall story of the source video. Also, the model has a flexible structure so that the duration of an abstract can be adjusted depending on the requirements given by viewers. We get clues for human understanding of a story from scenario writing rules and editorial techniques which are popularly used in the process of video producing. We have implemented the proposed model and successfully applied it to several TV dramas.
625918
Part-Based Local Shape Models for Colon Polyp Detection
This paper presents a model-based technique for lesion detection in colon CT scans that uses analytical shape models to map the local shape curvature at individual voxels to anatomical labels. Local intensity profiles and curvature information have been previously used for discriminating between simple geometric shapes such as spherical and cylindrical structures. This paper introduces novel analytical shape models for colon-specific anatomy, viz. folds and polyps, built by combining parts with simpler geometric shapes. The models better approximate the actual shapes of relevant anatomical structures while allowing the application of model-based analysis on the simpler model parts. All parameters are derived from the analytical models, resulting in a simple voxel labeling scheme for classifying individual voxels in a CT volume. The algorithm's performance is evaluated against expert-determined ground truth on a database of 42 scans and performance is quantified by free-response receiver-operator curves.
16022713
Query based event extraction along a timeline
In this paper, we present a framework and a system that extracts events relevant to a query from a collection C of documents, and places such events along a timeline. Each event is represented by a sentence extracted from C, based on the assumption that "important" events are widely cited in many documents for a period of time within which these events are of interest. In our experiments, we used queries that are event types ("earthquake") and person names (e.g. "George Bush"). Evaluation was performed using G8 leader names as queries: comparison made by human evaluators between manually and system generated timelines showed that although manually generated timelines are on average more preferable, system generated timelines are sometimes judged to be better than manually constructed ones.
29091082
Circular window control schemes in fast packet switches
In this paper, we investigate a scheduling algorithm, called circular window control (CWC) scheme, for packet switch fabrics. The scheme is simple and efficient. It uses a fixed length window with circular transmission sequences to minimize possible switch and output contentions. The scheme can attain a maximal throughput of 100%; in nonblocking switches as well as banyan-based blocking switches. The performance analyses and simulation results of the CWC scheme an also presented.
13167655
Optimal Dynamic Control of Resources in a Distributed System
Abstrad-The various advantages of distributed systems can be reallzed unly when their resources are ‘*optimally” (in some sense) contrdled and utilI7~d. For example, distributed systems must he recnnfigured dynamically to rope with component failures and workload changts. Owing to the inherent dilkulty in formulating and solving re~iurce contrd problems, the resnurce control strategies currently propoacdlused for distributed systems are largely ad hoc. It is our purpose in this paper to I) quantitatively formulate the problem of controlling resources in a distributed system so as tu optimize a reward function, and 2) derive optimal control strategies using Markov decision theory. The control variables treated here are quite generak fnr example, they could be control decisions related to system configuration, repair, diagnostics, files, or data. Two algnrithms for resource contnfl In distributed systems are derived for time-invariant Bnd periodic environments, respectively. A detailed example to demonstrate the power and usefulness of our approach is provided.