2012 IEEE International Conference on Multimedia and Expo最新文献_第4页

2D Face Alignment and Pose Estimation Based on 3D Facial Models 基于三维人脸模型的二维人脸对齐与姿态估计

2012 IEEE International Conference on Multimedia and Expo Pub Date : 2012-07-09 DOI: 10.1109/ICME.2012.60

Shen-Chi Chen, Chia-Hsiang Wu, Shih-Yao Lin, Y. Hung

引用次数: 12

Optimal Bit-allocation for Wavelet-based Scalable Video Coding 基于小波的可扩展视频编码的最优位分配

2012 IEEE International Conference on Multimedia and Expo Pub Date : 2012-07-09 DOI: 10.1109/ICME.2012.146

Guan-Ju Peng, W. Hwang, Sao-Jie Chen

{"title":"Optimal Bit-allocation for Wavelet-based Scalable Video Coding","authors":"Guan-Ju Peng, W. Hwang, Sao-Jie Chen","doi":"10.1109/ICME.2012.146","DOIUrl":"https://doi.org/10.1109/ICME.2012.146","url":null,"abstract":"We investigate the wavelet-based scalable video coding problem and present a solution that takes account of each user's preferred resolution. Based on the preference, we formulate the bit allocation problem of wavelet-based scalable video coding. We propose three methods to solve the problem. The first is an efficient Lagrangian-based method that solves the upper bound of the problem optimally, and the second is a less efficient dynamic programming method that solves the problem optimally. Both methods require knowledge of the user's preference. For the case where the user's preference is unknown, we solve the problem by a min-max approach. Our objective is to find the bit allocation solution that maximizes the worst possible performance. We show that the worst performance occurs when all users subscribe to the same spatial, temporal, and quality resolutions. Thus, the min-max solution is exactly the same as the traditional bit allocation method for a non-scalable wavelet codec. We conduct several experiments on the 2D+t MCTF-EZBC wavelet codec with respect to various subscribers' preferences. The results demonstrate that knowing the users' preferences improves the coding performance of the scalable video codec significantly.","PeriodicalId":273567,"journal":{"name":"2012 IEEE International Conference on Multimedia and Expo","volume":"224 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134289394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Ontological Inference Framework with Joint Ontology Construction and Learning for Image Understanding 面向图像理解的本体构建与学习的本体推理框架

2012 IEEE International Conference on Multimedia and Expo Pub Date : 2012-07-09 DOI: 10.1109/ICME.2012.145

S. Tsai, Hao Tang, Feng Tang, Thomas S. Huang

引用次数: 4

From Text Detection in Videos to Person Identification 从视频文本检测到人物识别

2012 IEEE International Conference on Multimedia and Expo Pub Date : 2012-07-09 DOI: 10.1109/ICME.2012.119

Johann Poignant, L. Besacier, G. Quénot, F. Thollard

引用次数: 53

Comparison of Curvelet and Wavelet Texture Features for Content Based Image Retrieval 基于内容的图像检索中曲波和小波纹理特征的比较

2012 IEEE International Conference on Multimedia and Expo Pub Date : 2012-07-09 DOI: 10.1109/ICME.2012.90

I. Sumana, Guojun Lu, Dengsheng Zhang

引用次数: 30

An Adaptive Dynamic Scheduling Scheme for H.264/AVC Decoding on Multicore Architecture 一种多核H.264/AVC解码的自适应动态调度方案

2012 IEEE International Conference on Multimedia and Expo Pub Date : 2012-07-09 DOI: 10.1109/ICME.2012.9

Dung Vu, Jilong Kuang, L. Bhuyan

{"title":"An Adaptive Dynamic Scheduling Scheme for H.264/AVC Decoding on Multicore Architecture","authors":"Dung Vu, Jilong Kuang, L. Bhuyan","doi":"10.1109/ICME.2012.9","DOIUrl":"https://doi.org/10.1109/ICME.2012.9","url":null,"abstract":"Parallelizing H.264/AVC decoding on multicore architectures is challenged by its inherent structural and functional dependencies at both frame and macro-block levels, as macro-blocks and certain frame types must be decoded in a sequential order. So far, dynamic scheduling scheme with recursive tail submit, as one of the best existing algorithms, provides a good throughput performance by exploiting macro-block level parallelism and mitigating global queue contention. Nevertheless, it fails to achieve an optimal performance due to 1) the use of global queue, which incurs substantial synchronization overhead when the number of cores increases and 2) the unawareness of cache locality with respect to the underlying hierarchical core/cache topology that results in unnecessary latency, communication cost and load imbalance. In this paper, we propose an adaptive dynamic scheduling scheme that employs multiple local queues to reduce lock contention, and assigns tasks in a cache locality aware and load-balancing fashion so that neighboring macro-blocks are preferably dispatched to nearby cores. We design, implement and evaluate our scheme on a 32-core cc-NUMA SGI server. Compared to existing alternatives by running real benchmark applications, we observe that our scheme produces higher throughput and lower latency with more balanced workload and less communication cost.","PeriodicalId":273567,"journal":{"name":"2012 IEEE International Conference on Multimedia and Expo","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134286065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Grouplet-Based Distance Metric Learning for Video Concept Detection 基于分组的视频概念检测距离度量学习

2012 IEEE International Conference on Multimedia and Expo Pub Date : 2012-07-09 DOI: 10.1109/ICME.2012.123

Wei Jiang, A. Loui

{"title":"Grouplet-Based Distance Metric Learning for Video Concept Detection","authors":"Wei Jiang, A. Loui","doi":"10.1109/ICME.2012.123","DOIUrl":"https://doi.org/10.1109/ICME.2012.123","url":null,"abstract":"We investigate general concept detection in unconstrained videos. A distance metric learning algorithm is developed to use the information of the group let structure for improved detection. A group let is defined as a set of audio and/or visual code words that are grouped together according to their strong correlations in videos. By using the entire group lets as building elements, concepts can be more robustly detected than using discrete audio or visual code words. Compared with the traditional method of generating aggregated group let-based features for classification, our group let-based distance metric learning approach directly learns distances between data points, which better preserves the group let structure. Specifically, our algorithm uses an iterative quadratic programming formulation where the optimal distance metric can be effectively learned based on the large-margin nearest-neighbor setting. The framework is quite flexible, where various types of distances can be computed using individual group lets, and through the same distance metric learning algorithm the distances computed over individual group lets can be combined for final classification. We extensively evaluate our method over the large-scale Columbia Consumer Video set. Experiments demonstrate that our approach can achieve consistent and significant performance improvements.","PeriodicalId":273567,"journal":{"name":"2012 IEEE International Conference on Multimedia and Expo","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132390661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Joint Example-Based Depth Map Super-Resolution 联合样例深度图超分辨率

2012 IEEE International Conference on Multimedia and Expo Pub Date : 2012-07-09 DOI: 10.1109/ICME.2012.30

Yanjie Li, Tianfan Xue, Lifeng Sun, Jianzhuang Liu

引用次数: 93

LIPS: A Lightweight Inter-layer Protection Scheme for Scalable Video Coding 可扩展视频编码的轻量级层间保护方案

2012 IEEE International Conference on Multimedia and Expo Pub Date : 2012-07-09 DOI: 10.1109/ICME.2012.33

Shih-Ying Chang, Hsin-Ta Chiao

引用次数: 2

Lumipen: Projection-Based Mixed Reality for Dynamic Objects Lumipen:基于投影的混合现实动态对象

2012 IEEE International Conference on Multimedia and Expo Pub Date : 2012-07-09 DOI: 10.1109/ICME.2012.34

Kohei Okumura, H. Oku, M. Ishikawa

引用次数: 40