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Proceedings of the 19th ACM international conference on Multimedia最新文献

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Saving bitrate vs. pleasing users: where is the break-even point in mobile video quality? 节省比特率vs取悦用户:移动视频质量的盈亏平衡点在哪里?
Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072351
Wei Song, D. Tjondronegoro, M. Docherty
{"title":"Saving bitrate vs. pleasing users: where is the break-even point in mobile video quality?","authors":"Wei Song, D. Tjondronegoro, M. Docherty","doi":"10.1145/2072298.2072351","DOIUrl":"https://doi.org/10.1145/2072298.2072351","url":null,"abstract":"This paper presents a comprehensive study to find the most efficient bitrate requirement to deliver mobile video that optimizes bandwidth, while at the same time maintains good user viewing experience. In the study, forty participants were asked to choose the lowest quality video that would still provide for a comfortable and long-term viewing experience, knowing that higher video quality is more expensive and bandwidth intensive. This paper proposes the lowest pleasing bitrates and corresponding encoding parameters for five different content types: cartoon, movie, music, news and sports. It also explores how the lowest pleasing quality is influenced by content type, image resolution, bitrate, and user gender, prior viewing experience, and preference. In addition, it analyzes the trajectory of users' progression while selecting the lowest pleasing quality. The findings reveal that the lowest bitrate requirement for a pleasing viewing experience is much higher than that of the lowest acceptable quality. Users' criteria for the lowest pleasing video quality are related to the video's content features, as well as its usage purpose and the user's personal preferences. These findings can provide video providers guidance on what quality they should offer to please mobile users.","PeriodicalId":318758,"journal":{"name":"Proceedings of the 19th ACM international conference on Multimedia","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130471867","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: 40
OpenMusic: visual programming environment for music composition, analysis and research OpenMusic:用于音乐创作、分析和研究的可视化编程环境
Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072434
J. Bresson, C. Agón, G. Assayag
{"title":"OpenMusic: visual programming environment for music composition, analysis and research","authors":"J. Bresson, C. Agón, G. Assayag","doi":"10.1145/2072298.2072434","DOIUrl":"https://doi.org/10.1145/2072298.2072434","url":null,"abstract":"OpenMusic is an open source environment dedicated to music composition. The core of this environment is a full-featured visual programming language based on Common Lisp and CLOS (Common Lisp Object System) allowing to design processes for the generation or manipulation of musical material. This language can also be used for general purpose visual programming and other (possibly extra-musical) applications.","PeriodicalId":318758,"journal":{"name":"Proceedings of the 19th ACM international conference on Multimedia","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134165162","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: 95
Sensor-rich video exploration on a map interface 传感器丰富的视频探索地图界面
Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072459
Beomjoo Seo, Jia Hao, Guanfeng Wang
{"title":"Sensor-rich video exploration on a map interface","authors":"Beomjoo Seo, Jia Hao, Guanfeng Wang","doi":"10.1145/2072298.2072459","DOIUrl":"https://doi.org/10.1145/2072298.2072459","url":null,"abstract":"Result presentations from searches into video repositories is still a challenging problem. Current systems usually display a ranked list that shows the first frame of each video. Users then explore the videos one-by-one. In our recent work we have investigated the fusion of captured video with a continuous stream of sensor meta-data. These so-called sensor-rich videos can conveniently be captured with today's smartphones. Importantly, the recorded sensor-data streams enable processing and result resentation in novel and useful ways. In this demonstration we present a system that provides an integrated solution to present videos based on keyframe extraction and interactive, map-based browsing. As a key feature, the system automatically computes popular places based on the collective information from all the available videos. For each video it then extracts keyframes and renders them at their proper location on the map synchronously with the video playback. All the processing is performed in real-time, which allows for an interactive exploration of all the videos in a geographic area.","PeriodicalId":318758,"journal":{"name":"Proceedings of the 19th ACM international conference on Multimedia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131172155","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: 12
Video anatomy: cutting video volume for profile 视频解剖:切割视频体积的轮廓
Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2071939
H. Cai, J. Zheng
{"title":"Video anatomy: cutting video volume for profile","authors":"H. Cai, J. Zheng","doi":"10.1145/2072298.2071939","DOIUrl":"https://doi.org/10.1145/2072298.2071939","url":null,"abstract":"This work takes a new aspect view to profile a video volume to a video track as a digest for video preview. Our projected video profile contains both spatial and temporal information inclusively in a 2D image scroll that is continuous, compact, scalable, and indexing to each frame. To profile various types of video clips, we investigate the global flow field under all camera actions, and propose a uniformed scheme that uses a sampling line to cut the video volume across the major optical flow field. The resulting profile obtains an intrinsic scene space less influenced by the camera actions, and can be displayed in a video track to guide the access to video frames, and facilitate video browsing, editing, and retrieval.","PeriodicalId":318758,"journal":{"name":"Proceedings of the 19th ACM international conference on Multimedia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130976166","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
WSM2011: third ACM workshop on social media WSM2011:第三届ACM社会媒体研讨会
Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072389
S. Hoi, Michal Jacovi, Y. Kompatsiaris, Jiebo Luo, K. Tserpes
{"title":"WSM2011: third ACM workshop on social media","authors":"S. Hoi, Michal Jacovi, Y. Kompatsiaris, Jiebo Luo, K. Tserpes","doi":"10.1145/2072298.2072389","DOIUrl":"https://doi.org/10.1145/2072298.2072389","url":null,"abstract":"The Third Workshop on Social Media (WSM2011) continues the series of Workshops on Social Media in 2009 and 2010 and has been established as a platform for the presentation and discussion of the latest, key research issues in social media analysis, exploration, search, mining, and emerging new social media applications. It is held in conjunction with the ACM International Multimedia Conference (MM'11) at Scottsdale, Arizona, USA, 2011 and has attracted contributions on various aspects of social media including data mining from social media, content organization, geo-localization, personalization, recommendation systems, user experience, machine learning and social media approaches and architectures for large-scale data processing.","PeriodicalId":318758,"journal":{"name":"Proceedings of the 19th ACM international conference on Multimedia","volume":"605 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133342245","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: 0
Towards peer-assisted rendering in networked virtual environments 网络虚拟环境中的对等辅助渲染
Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072324
Minhui Zhu, S. Mondet, Géraldine Morin, Wei Tsang Ooi, Weiwei Cheng
{"title":"Towards peer-assisted rendering in networked virtual environments","authors":"Minhui Zhu, S. Mondet, Géraldine Morin, Wei Tsang Ooi, Weiwei Cheng","doi":"10.1145/2072298.2072324","DOIUrl":"https://doi.org/10.1145/2072298.2072324","url":null,"abstract":"This paper introduces a new technique, called peer-assisted rendering, that aims to enable interactive navigation in a 3D networked virtual environment using a resource-constrained device, by speeding up the rendering. A resource-constrained client requests part of the rendered scenes from other peers with similar viewpoints within the virtual environment, and merges the rendered parts into its own view. This approach is more scalable than previous solutions based on server-based pre-rendering. The goal of this paper is to make a strong case for the feasibility of peer-assisted rendering through the following two messages. First, by analyzing a large number of user traces from a popular virtual world called Second Life, we show that there are surprisingly many users with similar viewpoints and encompass large number of common objects in their viewing areas, indicating that a client can potentially find multiple other peers that can assist in rendering. Second, by combining three different rendering methods, each contributing to rendering of different classes of objects in the scene, we show that it is possible for a client to render the scene efficiently with little visual artifacts.","PeriodicalId":318758,"journal":{"name":"Proceedings of the 19th ACM international conference on Multimedia","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132138950","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: 15
Augmented makeover based on 3D morphable model 基于三维变形模型的增强改造
Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072067
P. P. Wang, Xiaofeng Tong, Yangzhou Du, Jianguo Li, Wei Hu, Yimin Zhang
{"title":"Augmented makeover based on 3D morphable model","authors":"P. P. Wang, Xiaofeng Tong, Yangzhou Du, Jianguo Li, Wei Hu, Yimin Zhang","doi":"10.1145/2072298.2072067","DOIUrl":"https://doi.org/10.1145/2072298.2072067","url":null,"abstract":"Avatar is the virtual representation of user's facial, body, and motion characteristics in computer game, social network, and augmented reality. Facial modeling needs enormous efforts to achieve immersive experience in applications like avatar chatting or online makeover. Great challenge exists in robust detection of 2D facial prominent points and mapping them to 3D models in a parameterized manner. Another challenge is how to characterize semantic components of eyes, mouth, nose, and cheek rather than low level mesh geometries. In this paper, we proposed an augmented makeover framework to deal with aforementioned challenges. Aiming to provide amateurs with flexible customizations, morphable model is constructed from a set of scanned 3D face data set. Appearance personalization is carried out in the offline phase where single image and multiple views are discussed respectively to generate deformative shape in a progressive manner. Augmentation is implemented in the online phase where a fast and robust 3D tracking is used to balance the tradeoff between accuracy and real-time requirements. By this means, immersive Human Computer Interaction such as virtual makeover and photo-realistic avatar chatting could be achieved.","PeriodicalId":318758,"journal":{"name":"Proceedings of the 19th ACM international conference on Multimedia","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132672685","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: 2
Automatic object segmentation from large scale 3D urban point clouds through manifold embedded mode seeking 基于流形嵌入模式搜索的大规模三维城市点云目标自动分割
Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2071998
Zhiding Yu, Chunjing Xu, Jianzhuang Liu, O. Au, Xiaoou Tang
{"title":"Automatic object segmentation from large scale 3D urban point clouds through manifold embedded mode seeking","authors":"Zhiding Yu, Chunjing Xu, Jianzhuang Liu, O. Au, Xiaoou Tang","doi":"10.1145/2072298.2071998","DOIUrl":"https://doi.org/10.1145/2072298.2071998","url":null,"abstract":"This paper presents a system that can automatically segment objects in large scale 3D point clouds obtained from urban ranging images. The system consists of three steps: The first one involves a ground detection process that can detect relatively complex terrain and separate it from other objects. The second step superpixelizes the remaining objects to speed up the segmentation process. In the final step, a manifold embedded mode seeking method is adopted to segment the point clouds. Even though the segmentation of urban objects is a challenging problem in terms of accuracy and problem scale, our system can efficiently generate very good segmentation results. The proposed manifold learning effectively improves the segmentation performance due to the fact that continuous artificial objects often have manifold-like structures.","PeriodicalId":318758,"journal":{"name":"Proceedings of the 19th ACM international conference on Multimedia","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132742162","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
Dynamic social network for narrative video analysis 动态社交网络叙事视频分析
Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072413
Tsung-Hung Tsai, Wen-Huang Cheng, Yung-Huan Hsieh
{"title":"Dynamic social network for narrative video analysis","authors":"Tsung-Hung Tsai, Wen-Huang Cheng, Yung-Huan Hsieh","doi":"10.1145/2072298.2072413","DOIUrl":"https://doi.org/10.1145/2072298.2072413","url":null,"abstract":"Narrative video analysis has attracted much research attention, for narrative scenes can provide meaningful representations of multimedia contents. To go beyond the limitations of content based appraoches, social network techniques was introduced in the literature to explore the high-level narrative structures by mining the relations between video characters. Taking into account the fact that such a social network is not static but changes over time as the video narrative evolves, in this work, we develop a novel social network model, namely dynamic social network, for capturing the spatiotemporal dynamics in the social network of video characters so as to enable the automatic segmentation of a video into a sequence of narrative scenes. The proposed approach is experimented with various genres of movies and the results demonstrate our effectiveness.","PeriodicalId":318758,"journal":{"name":"Proceedings of the 19th ACM international conference on Multimedia","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131437397","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: 7
Tag-based social image search with visual-text joint hypergraph learning 基于标签的视觉-文本联合超图学习社交图像搜索
Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072054
Yue Gao, Meng Wang, Huanbo Luan, Jialie Shen, Shuicheng Yan, D. Tao
{"title":"Tag-based social image search with visual-text joint hypergraph learning","authors":"Yue Gao, Meng Wang, Huanbo Luan, Jialie Shen, Shuicheng Yan, D. Tao","doi":"10.1145/2072298.2072054","DOIUrl":"https://doi.org/10.1145/2072298.2072054","url":null,"abstract":"Tag-based social image search has attracted great interest and how to order the search results based on relevance level is a research problem. Visual content of images and tags have both been investigated. However, existing methods usually employ tags and visual content separately or sequentially to learn the image relevance. This paper proposes a tag-based image search with visual-text joint hypergraph learning. We simultaneously investigate the bag-of-words and bag-of-visual-words representations of images and accomplish the relevance estimation with a hypergraph learning approach. Each textual or visual word generates a hyperedge in the constructed hypergraph. We conduct experiments with a real-world data set and experimental results demonstrate the effectiveness of our approach.","PeriodicalId":318758,"journal":{"name":"Proceedings of the 19th ACM international conference on Multimedia","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131447404","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: 90
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