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2012 Fourth International Workshop on Quality of Multimedia Experience最新文献

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VITEQ: A generic framework for no-reference quality evaluation of video testimonials VITEQ:一个无参考质量评价视频推荐的通用框架
2012 Fourth International Workshop on Quality of Multimedia Experience Pub Date : 2012-07-05 DOI: 10.1109/QoMEX.2012.6263879
S. Verstockt, P. D. Potter, W. D. Neve, P. Lambert, R. Walle
{"title":"VITEQ: A generic framework for no-reference quality evaluation of video testimonials","authors":"S. Verstockt, P. D. Potter, W. D. Neve, P. Lambert, R. Walle","doi":"10.1109/QoMEX.2012.6263879","DOIUrl":"https://doi.org/10.1109/QoMEX.2012.6263879","url":null,"abstract":"This paper proposes a generic framework for no-reference quality evaluation of video testimonials. The global quality of the video testimonials is estimated by fusing the individual scores of a selection of spatial, temporal, audio and content-related metrics. Based on the global quality score, feedback is given to the user and the video/audio quality improver can be activated. Experiments on a large set of video testimonials show that the proposed objective evaluation closely matches the perception of users.","PeriodicalId":6303,"journal":{"name":"2012 Fourth International Workshop on Quality of Multimedia Experience","volume":"68 1","pages":"33-34"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87912670","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
How to evaluate objective video quality metrics reliably 如何可靠地评估客观视频质量指标
2012 Fourth International Workshop on Quality of Multimedia Experience Pub Date : 2012-07-05 DOI: 10.1109/QoMEX.2012.6263839
J. Korhonen, Nino Burini, Junyong You, Ehsan Nadernejad
{"title":"How to evaluate objective video quality metrics reliably","authors":"J. Korhonen, Nino Burini, Junyong You, Ehsan Nadernejad","doi":"10.1109/QoMEX.2012.6263839","DOIUrl":"https://doi.org/10.1109/QoMEX.2012.6263839","url":null,"abstract":"The typical procedure for evaluating the performance of different objective quality metrics and indices involves comparisons between subjective quality ratings and the quality indices obtained using the objective metrics in question on the known video sequences. Several correlation indicators can be employed to assess how well the subjective ratings can be predicted from the objective values. In this paper, we give an overview of the potential sources for uncertainties and inaccuracies in such studies, related both to the method of comparison, possible inaccuracies in the subjective data, as well as processing of subjective data. We also suggest some general guidelines for researchers to make comparison studies of objective video quality metrics more reliable and useful for the practitioners in the field.","PeriodicalId":6303,"journal":{"name":"2012 Fourth International Workshop on Quality of Multimedia Experience","volume":"48 1","pages":"57-62"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77617606","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: 20
Audio-visual discrepancy and the influence on vertical sound source localization 视听差异及其对垂直声源定位的影响
2012 Fourth International Workshop on Quality of Multimedia Experience Pub Date : 2012-07-05 DOI: 10.1109/QoMEX.2012.6263855
S. Werner, Judith Liebetrau, T. Sporer
{"title":"Audio-visual discrepancy and the influence on vertical sound source localization","authors":"S. Werner, Judith Liebetrau, T. Sporer","doi":"10.1109/QoMEX.2012.6263855","DOIUrl":"https://doi.org/10.1109/QoMEX.2012.6263855","url":null,"abstract":"Human audio perception is influenced by vision and vice versa. The effect and thresholds of perceptual fusion, for example the ventriloquism-effect, are well investigated for natural listening conditions in the horizontal plane. Modern reproduction approaches for realistic spatial audio, e.g. binaural reproduction, promise more realistic sound reproduction, though, including proper perception of direction, distance, and elevation. This raises the question if the thresholds of perceptual fusion in audio reproduction systems that consider elevation are the same as in natural listening conditions. To estimate the influence of audiovisual discrepancy on vertical sound source localization via binaural headphones, two experiments were conducted. Results show an effect of similar magnitude for the vertical and horizontal plane.","PeriodicalId":6303,"journal":{"name":"2012 Fourth International Workshop on Quality of Multimedia Experience","volume":"48 1","pages":"133-139"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76900117","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: 8
Is taking into account the subjects degree of knowledge and expertise enough when rating quality? 在评定质量时，是否充分考虑受试者的知识和专业程度?
2012 Fourth International Workshop on Quality of Multimedia Experience Pub Date : 2012-07-05 DOI: 10.1109/QoMEX.2012.6263868
M. Quintero, A. Raake
{"title":"Is taking into account the subjects degree of knowledge and expertise enough when rating quality?","authors":"M. Quintero, A. Raake","doi":"10.1109/QoMEX.2012.6263868","DOIUrl":"https://doi.org/10.1109/QoMEX.2012.6263868","url":null,"abstract":"This paper provides the results of a speech quality listening test on Wideband (WB, 500-7000 Hz) and narrowband (NB; 300-3400 Hz) codecs for new wideband-based, so-called “high-definition” (HD Voice) telephony services. Aside of error-free coding, the experiment also evaluated the effects of packet loss and external noise. Unlike “expert vs non-expert differentiation” typical of speech quality research, users are classified into six groups according to demographic characteristics, their attitude towards adopting new technologies and socio-economic information. With this experiment, we want to present how factors beyond the level of prior knowledge of the users affect their perception of quality.","PeriodicalId":6303,"journal":{"name":"2012 Fourth International Workshop on Quality of Multimedia Experience","volume":"33 1","pages":"194-199"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77898092","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: 8
Optimizing image quality using test signals: Trading off blur, noise and contrast 使用测试信号优化图像质量:权衡模糊、噪声和对比度
2012 Fourth International Workshop on Quality of Multimedia Experience Pub Date : 2012-07-05 DOI: 10.1109/QoMEX.2012.6263867
B. Goossens, H. Luong, L. Platisa, W. Philips
{"title":"Optimizing image quality using test signals: Trading off blur, noise and contrast","authors":"B. Goossens, H. Luong, L. Platisa, W. Philips","doi":"10.1109/QoMEX.2012.6263867","DOIUrl":"https://doi.org/10.1109/QoMEX.2012.6263867","url":null,"abstract":"Objective image quality assessment (QA) is crucial in order to improve imaging systems and image processing techniques. In medical imaging, model observers that estimate signal detectability, have become widespread and promising as a means to avoid costly human observer experiments. However, signal detectability alone does not give the complete picture: one may also be interested in optimizing several independent quality factors (e.g. contrast, spatial resolution, noise). In recent work, we have proposed the channelized joint observer (CJO), to jointly detect and estimate random parametric signals in images, a so-called signal-known-statistically (SKS) detection task. In this paper, we show how the estimation capabilities of the CJO can be exploited to estimate several image quality factors in degraded images, through signal insertion. By fixing the signal detectability, we illustrate how to benefit from the trade-offs that exist between the different quality factors. Our method is in the first place intended to aid medical image reconstruction techniques and medical display design, although the technique can also be useful in a much wider context.","PeriodicalId":6303,"journal":{"name":"2012 Fourth International Workshop on Quality of Multimedia Experience","volume":"15 1","pages":"260-265"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79980020","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
Challenges in crowd-based video quality assessment 基于人群的视频质量评估面临的挑战
2012 Fourth International Workshop on Quality of Multimedia Experience Pub Date : 2012-07-05 DOI: 10.1109/QoMEX.2012.6263866
Christian Keimel, Julian Habigt, K. Diepold
{"title":"Challenges in crowd-based video quality assessment","authors":"Christian Keimel, Julian Habigt, K. Diepold","doi":"10.1109/QoMEX.2012.6263866","DOIUrl":"https://doi.org/10.1109/QoMEX.2012.6263866","url":null,"abstract":"Video quality evaluation with subjective testing is both time consuming and expensive. A promising new approach to traditional testing is the so-called crowdsourcing, moving the testing effort into the Internet. The advantages of this approach are not only the access to a larger and more diverse pool of test subjects, but also the significant reduction of the financial burden. Recent contributions have also shown that crowd-based video quality assessment can deliver results comparable to traditional testing in some cases. In general, however, new problems arise, as no longer every test detail can be controlled, resulting in less reliable results. Therefore we will discuss in this contribution the conceptual, technical, motivational and reliability challenges that need to be addressed, before this promising approach to subjective testing can become a valid alternative to the testing in standardized environments.","PeriodicalId":6303,"journal":{"name":"2012 Fourth International Workshop on Quality of Multimedia Experience","volume":"40 1","pages":"13-18"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76351897","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: 33
A proposal project for a blind image quality assessment by learning distortions from the full reference image quality assessments 一个盲图像质量评估的建议项目，通过学习失真从完整的参考图像质量评估
2012 Fourth International Workshop on Quality of Multimedia Experience Pub Date : 2012-07-05 DOI: 10.1109/QoMEX.2012.6263876
S. Paris
{"title":"A proposal project for a blind image quality assessment by learning distortions from the full reference image quality assessments","authors":"S. Paris","doi":"10.1109/QoMEX.2012.6263876","DOIUrl":"https://doi.org/10.1109/QoMEX.2012.6263876","url":null,"abstract":"This short paper presents a perspective plan to build a null reference image quality assessment. Its main goal is to deliver both the objective score and the distortion map for a given distorted image without the knowledge of its reference image.","PeriodicalId":6303,"journal":{"name":"2012 Fourth International Workshop on Quality of Multimedia Experience","volume":"12 1","pages":"29-30"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84490137","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
The TUM high definition video datasets TUM高清视频数据集
2012 Fourth International Workshop on Quality of Multimedia Experience Pub Date : 2012-07-05 DOI: 10.1109/QoMEX.2012.6263865
Christian Keimel, A. Redl, K. Diepold
{"title":"The TUM high definition video datasets","authors":"Christian Keimel, A. Redl, K. Diepold","doi":"10.1109/QoMEX.2012.6263865","DOIUrl":"https://doi.org/10.1109/QoMEX.2012.6263865","url":null,"abstract":"The research on video quality metrics depends on the results from subjective testing for both the design and development of metrics, but also for their verification. As it is often too cumbersome to conduct subjective tests, freely available data sets that include both mean opinion scores and the distorted videos are becoming ever more important. While many datasets are already widely available, the majority of these data sets focus on smaller resolutions. We therefore present in this contribution the TUM high definition datasets that include videos in both 1080p25 and 1080p50, encoded with different coding technologies and settings, H.264/AVC and Dirac, but also different presentation devices from reference monitors to home-cinema projectors. Additionally a soundtrack is provided for the home-cinema scenario. The datasets are made freely available for download under a creative commons license.","PeriodicalId":6303,"journal":{"name":"2012 Fourth International Workshop on Quality of Multimedia Experience","volume":"3 1","pages":"97-102"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83562566","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: 43
Integrating the everyday-life context in subjective video quality experiments 在主观视频质量实验中融入日常生活情境
2012 Fourth International Workshop on Quality of Multimedia Experience Pub Date : 2012-07-05 DOI: 10.1109/QoMEX.2012.6263848
W. V. D. Broeck, An Jacobs, N. Staelens
{"title":"Integrating the everyday-life context in subjective video quality experiments","authors":"W. V. D. Broeck, An Jacobs, N. Staelens","doi":"10.1109/QoMEX.2012.6263848","DOIUrl":"https://doi.org/10.1109/QoMEX.2012.6263848","url":null,"abstract":"Controlled subjective quality experiments are a well-known method to make decisions on the improvement of Quality of Service (QoS) of video streams. Recently it became clear that from a point of view of the consumer or user, the Quality of Experience (QoE) is more relevant and can influence the optimal QoS as determined in a lab-setting. The measurement of QoS parameters in a lab-setting does not take into account the specific context of the practice that is under examination (e,g. watching video content). In this paper we discuss a method of contextualized subjective quality experiments as we applied in different research projects in complement to the standardized lab-experiments. The strength of this method is that video and audio quality is assessed in the real-life context of the user, i.e. his or her natural habitat in which the behavior or practice normally takes place. We provide an overview of how we applied the contextualized research approach in two cases. Next we discuss the method's strengths and weaknesses and suggest a refinement of the methodology.","PeriodicalId":6303,"journal":{"name":"2012 Fourth International Workshop on Quality of Multimedia Experience","volume":"4 1","pages":"19-24"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77276593","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: 14
Ensuring Quality of Experience for markerless image recognition applied to print media content 确保用于印刷媒体内容的无标记图像识别的体验质量
2012 Fourth International Workshop on Quality of Multimedia Experience Pub Date : 2012-07-05 DOI: 10.1109/QOMEX.2012.6263857
S. Davis, E. Cheng, C. Ritz, I. Burnett
{"title":"Ensuring Quality of Experience for markerless image recognition applied to print media content","authors":"S. Davis, E. Cheng, C. Ritz, I. Burnett","doi":"10.1109/QOMEX.2012.6263857","DOIUrl":"https://doi.org/10.1109/QOMEX.2012.6263857","url":null,"abstract":"This paper investigates how minimal user interaction paradigms and markerless image recognition technologies can be applied to matching print media content to online digital proofs. By linking print material to online content, users can enhance their experience with traditional forms of print media with updated online content, videos, interactive online features etc. The proposed approach is based on extracting features from images/text from mobile device camera images to form `fingerprints' that are used to find matching images/text within a limited test set. An important criterion for these applications is to ensure that the user Quality of Experience (QoE), particularly in terms of matching accuracy and time, is robust to a variety of conditions typically encountered in practical scenarios. In this paper, the performance of a number of computer vision techniques that extract the image features and form the fingerprints are analysed and compared. Both computer simulation tests and mobile device experiments in realistic user conditions are conducted to study the effectiveness of the techniques when considering scale, rotation, blur and lighting variations typically encountered by a user.","PeriodicalId":6303,"journal":{"name":"2012 Fourth International Workshop on Quality of Multimedia Experience","volume":"29 1","pages":"158-163"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75982417","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: 6
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