Proceedings of the 19th ACM international conference on Multimedia最新文献_第10页

A mobile location search system with active query sensing 一种具有主动查询感知的移动位置搜索系统

Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072468

Felix X. Yu, R. Ji, Tongtao Zhang, Shih-Fu Chang

引用次数: 2

Flicker effects in adaptive video streaming to handheld devices 自适应视频流到手持设备中的闪烁效果

Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072359

Pengpeng Ni, Ragnhild Eg, Alexander Eichhorn, C. Griwodz, P. Halvorsen

{"title":"Flicker effects in adaptive video streaming to handheld devices","authors":"Pengpeng Ni, Ragnhild Eg, Alexander Eichhorn, C. Griwodz, P. Halvorsen","doi":"10.1145/2072298.2072359","DOIUrl":"https://doi.org/10.1145/2072298.2072359","url":null,"abstract":"Streaming video over the Internet requires mechanisms that limit the streams' bandwidth consumption within its fair share. TCP streaming guarantees this and provides lossless streaming as a side-effect. Adaptation by packet drop does not occur in the network, and excessive startup latency and stalling must be prevented by adapting the bandwidth consumption of the video itself. However, when the adaptation is performed during an ongoing session, it may influence the perceived quality of the entire video and result in improved or reduced visual quality of experience. We have investigated visual artifacts that are caused by adaptive layer switching -- we call them flicker effects -- and present our results for handheld devices in this paper. We considered three types of flicker, namely noise, blur and motion flicker. The perceptual impact of flicker is explored through subjective assessments. We vary both the intensity of quality changes (amplitude) and the number of quality changes per second (frequency). Users' ability to detect and their acceptance of variations in the amplitudes and frequencies of the quality changes are explored across four content types. Our results indicate that multiple factors influence the acceptance of different quality variations. Amplitude plays the dominant role in delivering satisfactory video quality, while frequency can also be adjusted to relieve the annoyance of flicker artifacts.","PeriodicalId":318758,"journal":{"name":"Proceedings of the 19th ACM international conference on Multimedia","volume":"12 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":"122872130","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: 128

Semi-supervised face image retrieval using sparse coding with identity constraint 基于身份约束的稀疏编码半监督人脸图像检索

Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072017

Bor-Chun Chen, Y. Kuo, Yan-Ying Chen, Kuan-Yu Chu, Winston H. Hsu

引用次数: 45

Eye-tracking methodology and applications to images and video 眼动追踪方法及其在图像和视频中的应用

Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072406

Harish Katti, M. Kankanhalli

{"title":"Eye-tracking methodology and applications to images and video","authors":"Harish Katti, M. Kankanhalli","doi":"10.1145/2072298.2072406","DOIUrl":"https://doi.org/10.1145/2072298.2072406","url":null,"abstract":"Our tutorial introduces eye-tracking as an exciting, non-intrusive method of capturing user attention during human interaction with digital images and videos. We believe eye-gaze can play a valuable role in understanding and processing (a) huge volumes of image and video content generated as a result of human experiences and interaction with the environment (b) Personalization and in human-media interaction, having access to individual preferences and behavioral patterns would be a key component of such a system. Recent possibilities to seamlessly integrate eye-tracking into laptops and mobile devices opens up a plethora of possibilities for applications that can respond to user's visual attention strategies. (c) Visual content design such as in advertising often employs techniques that guide user attention to produce visual impact and elements of surprise and emotion. Eye-gaze has been used as a tool to evaluate different choices of visual elements and their placement. (d) Affective analysis of images and videos is an ongoing and challenging area in multimedia research, show recent results on how eye-gaze and accompanying pupillary dilation information can aid affective analysis.","PeriodicalId":318758,"journal":{"name":"Proceedings of the 19th ACM international conference on Multimedia","volume":"9 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":"131501354","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

SRV-TaGS: An Automatic TAGging and Search System for Sensor-Rich Outdoor Videos SRV-TaGS:一个传感器丰富的户外视频自动标记和搜索系统

Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072444

Zhijie Shen, Sakire Arslan Ay, S. H. Kim

引用次数: 0

Contextual synonym dictionary for visual object retrieval 上下文同义词字典的视觉对象检索

Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072364

Wenbin Tang, Rui Cai, Zhiwei Li, Lei Zhang

{"title":"Contextual synonym dictionary for visual object retrieval","authors":"Wenbin Tang, Rui Cai, Zhiwei Li, Lei Zhang","doi":"10.1145/2072298.2072364","DOIUrl":"https://doi.org/10.1145/2072298.2072364","url":null,"abstract":"In this paper, we study the problem of visual object retrieval by introducing a dictionary of contextual synonyms to narrow down the semantic gap in visual word quantization. The basic idea is to expand a visual word in the query image with its synonyms to boost the retrieval recall. Unlike the existing work such as soft-quantization, which only focuses on the Euclidean (l2) distance in descriptor space, we utilize the visual words which are more likely to describe visual objects with the same semantic meaning by identifying the words with similar contextual distributions (i.e. contextual synonyms). We describe the contextual distribution of a visual word using the statistics of both co-occurrence and spatial information averaged over all the image patches having this visual word, and propose an efficient system implementation to construct the contextual synonym dictionary for a large visual vocabulary. The whole construction process is unsupervised and the synonym dictionary can be naturally integrated into a standard bag-of-feature image retrieval system. Experimental results on several benchmark datasets are quite promising. The contextual synonym dictionary-based expansion consistently outperforms the l2 distance-based soft-quantization, and advances the state-of-the-art performance remarkably.","PeriodicalId":318758,"journal":{"name":"Proceedings of the 19th ACM international conference on Multimedia","volume":"5 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":"127709452","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: 21

The FCam API for programmable cameras 用于可编程相机的FCam API

Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072425

S. H. Park, Andrew Adams, Eino-Ville Talvala

引用次数: 2

Extracting intentionally captured regions using point trajectories 使用点轨迹提取有意捕获的区域

Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072029

Yuta Nakashima, N. Babaguchi

引用次数: 1

News contextualization with geographic and visual information 新闻语境化与地理和视觉信息

Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072317

Zechao Li, M. Wang, J. Liu, Changsheng Xu, Hanqing Lu

{"title":"News contextualization with geographic and visual information","authors":"Zechao Li, M. Wang, J. Liu, Changsheng Xu, Hanqing Lu","doi":"10.1145/2072298.2072317","DOIUrl":"https://doi.org/10.1145/2072298.2072317","url":null,"abstract":"In this paper, we investigate the contextualization of news documents with geographic and visual information. We propose a matrix factorization approach to analyze the location relevance for each news document. We also propose a method to enrich the document with a set of web images. For location relevance analysis, we first perform toponym extraction and expansion to obtain a toponym list from news documents. We then propose a matrix factorization method to estimate the location-document relevance scores while simultaneously capturing the correlation of locations and documents. For image enrichment, we propose a method to generate multiple queries from each news document for image search and then employ an intelligent fusion approach to collect a set of images from the search results. Based on the location relevance analysis and image enrichment, we introduce a news browsing system named NewsMap which can support users in reading news via browsing a map and retrieving news with location queries. The news documents with the corresponding enriched images are presented to help users quickly get information. Extensive experiments demonstrate the effectiveness of our approaches.","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":"117080441","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: 29

StoryImaging: a media-rich presentation system for textual stories StoryImaging:文本故事的富媒体呈现系统

Proceedings of the 19th ACM international conference on Multimedia Pub Date : 2011-11-28 DOI: 10.1145/2072298.2072451

Genliang Guan, Zhiyong Wang, Xiansheng Hua, D. Feng

引用次数: 1