发布求助
文献互助 智能选刊 最新文献

2009 IEEE International Workshop on Multimedia Signal Processing最新文献

筛选
英文 中文
Sub-pixel accuracy edge fitting by means of B-spline 基于b样条的亚像素精度边缘拟合
2009 IEEE International Workshop on Multimedia Signal Processing Pub Date : 2016-03-31 DOI: 10.1109/MMSP.2009.5293265
Ricardo Lucas Bastos Breder, Vania V. Estrela, Joaquim Teixeira de Assis
{"title":"Sub-pixel accuracy edge fitting by means of B-spline","authors":"Ricardo Lucas Bastos Breder, Vania V. Estrela, Joaquim Teixeira de Assis","doi":"10.1109/MMSP.2009.5293265","DOIUrl":"https://doi.org/10.1109/MMSP.2009.5293265","url":null,"abstract":"Local perturbations around contours strongly disturb the final result of computer vision tasks. It is common to introduce a priori information in the estimation process. Improvement can be achieved via a deformable model such as the snake model. In recent works, the deformable contour is modeled by means of B-spline snakes which allows local control, concise representation, and the use of fewer parameters. The estimation of the sub-pixel edges using a global B-spline model relies on the contour global determination according to a Maximum Likelihood framework and using the observed data likelihood. This procedure guarantees that the noisiest data will be filtered out. The data likelihood is computed as a consequence of the observation model which includes both orientation and position information. Comparative experiments of this algorithm and the classical spline interpolation have shown that the proposed algorithm outperforms the classical approach for Gaussian and Salt & Pepper noise.","PeriodicalId":397274,"journal":{"name":"2009 IEEE International Workshop on Multimedia Signal Processing","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129065961","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: 22
Feature analysis for quality assessment of reverberated speech 混响语音质量评价的特征分析
2009 IEEE International Workshop on Multimedia Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/MMSP.2009.5293326
A. Lima, T. Prego, S. L. Netto, Bowon Lee, A. Said, R. Schafer, T. Kalker, M. Fozunbal
{"title":"Feature analysis for quality assessment of reverberated speech","authors":"A. Lima, T. Prego, S. L. Netto, Bowon Lee, A. Said, R. Schafer, T. Kalker, M. Fozunbal","doi":"10.1109/MMSP.2009.5293326","DOIUrl":"https://doi.org/10.1109/MMSP.2009.5293326","url":null,"abstract":"This paper analyzes the ability of several measurements to quantify the reverberation effect in speech signals. We consider an intrusive scheme, in which the clean and reverberated signals are available, allowing one to estimate the corresponding room impulse response (RIR) signal. An artificial neural network (ANN) is trained for all features and used in a regression approach to estimate the human perceptual evaluation in a mean opinion score (MOS) 1–5 scale. Dimensionality reduction approaches are applied to generate a simpler ANN regression, establishing the most representative features for the problem at hand. A correlation level of 85% with subjective test scores was achieved by reducing the input-vector dimension from 10 to 3, including only the features of reverberation time, room spectral variance, and direct-to-reverberant energy ratio.","PeriodicalId":397274,"journal":{"name":"2009 IEEE International Workshop on Multimedia Signal Processing","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116679248","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
Detecting doubly compressed images based on quantization noise model and image restoration 基于量化噪声模型和图像复原的双压缩图像检测
2009 IEEE International Workshop on Multimedia Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/MMSP.2009.5293280
Yi-Lei Chen, Chiou-Ting Hsu
{"title":"Detecting doubly compressed images based on quantization noise model and image restoration","authors":"Yi-Lei Chen, Chiou-Ting Hsu","doi":"10.1109/MMSP.2009.5293280","DOIUrl":"https://doi.org/10.1109/MMSP.2009.5293280","url":null,"abstract":"Since JPEG has been a popularly used image compression standard, forgery detection in JPEG images now plays an important role. Forgeries on compressed images often involve recompression and tend to erase those forgery traces existed in uncompressed images. We could, however, try to discover new traces caused by recompression and use these traces to detect the recompression forgeries. Quantization is the critical step in lossy compression which maps the DCT coefficients in an irreversible way under the quantization constraint set (QCS) theorem. In this paper, we first derive that a doubly compressed image no longer follows the QCS theorem and then propose a novel quantization noise model to characterize single and doubly compressed images. In order to detect double compression forgery, we further propose to approximate the uncompressed ground truth image using image restoration techniques. We conduct a series of experiments to demonstrate the validity of the proposed quantization noise model and also the effectiveness of the forgery detection method with the proposed image restoration techniques.","PeriodicalId":397274,"journal":{"name":"2009 IEEE International Workshop on Multimedia Signal Processing","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120853147","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: 24
Multiple Selection Extrapolation for improved spatial error concealment 改进空间错误隐藏的多重选择外推法
2009 IEEE International Workshop on Multimedia Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/MMSP.2009.5293572
Jürgen Seiler, André Kaup
{"title":"Multiple Selection Extrapolation for improved spatial error concealment","authors":"Jürgen Seiler, André Kaup","doi":"10.1109/MMSP.2009.5293572","DOIUrl":"https://doi.org/10.1109/MMSP.2009.5293572","url":null,"abstract":"This contribution introduces a novel signal extrapolation algorithm and its application to image error concealment. The signal extrapolation is carried out by iteratively generating a model of the signal suffering from distortion. Thereby, the model results from a weighted superposition of two-dimensional basis functions whereas in every iteration step a set of these is selected and the approximation residual is projected onto the subspace they span. The algorithm is an improvement to the Frequency Selective Extrapolation that has proven to be an effective method for concealing lost or distorted image regions. Compared to this algorithm, the novel algorithm is able to reduce the processing time by a factor larger than three, by still preserving the very high extrapolation quality.","PeriodicalId":397274,"journal":{"name":"2009 IEEE International Workshop on Multimedia Signal Processing","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114887091","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
How quantization based schemes can be used in steganographic context 如何将基于量化的方案用于隐写
2009 IEEE International Workshop on Multimedia Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/MMSP.2009.5293335
S. Braci, C. Delpha, R. Boyer
{"title":"How quantization based schemes can be used in steganographic context","authors":"S. Braci, C. Delpha, R. Boyer","doi":"10.1109/MMSP.2009.5293335","DOIUrl":"https://doi.org/10.1109/MMSP.2009.5293335","url":null,"abstract":"The quantization based embedding systems are usually used in the information hiding domain, thanks to their efficiency and simplicity. In other hand, they are known to be insecure in steganography context (according to Cachins' security definition) because they distort the stego-signal density function. In this paper, we show that an important kind of quantization based systems (those resulting from the combination with the spread transform and classical data hiding schemes based on quantization ) preserve the probability density function of the stego-signal. We prove the undetectability theoretically and show how the spread transform makes the stego-message statistically non-dectectable in the real case.","PeriodicalId":397274,"journal":{"name":"2009 IEEE International Workshop on Multimedia Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122439612","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
Modeling of distortion caused by Markov-model burst packet losses in video transmission 视频传输中马尔可夫模型突发丢包引起的失真建模
2009 IEEE International Workshop on Multimedia Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/MMSP.2009.5293345
Zhicheng Li, Jacob Chakareski, Xiaodun Niu, Yongjun Zhang, W. Gu
{"title":"Modeling of distortion caused by Markov-model burst packet losses in video transmission","authors":"Zhicheng Li, Jacob Chakareski, Xiaodun Niu, Yongjun Zhang, W. Gu","doi":"10.1109/MMSP.2009.5293345","DOIUrl":"https://doi.org/10.1109/MMSP.2009.5293345","url":null,"abstract":"This paper addresses the problem of distortion modeling for video transmission over burst-loss channels characterized by a finite state Markov chain. A Distortion Trellis model is proposed, enabling us to estimate at the frame level the expected mean-square error (MSE) distortion caused by Markov-model bursty packet losses. A sliding window algorithm is developed to perform the MSE estimation with low complexity. Simulation results show that the proposed models are accurate for all tested average loss rates and average burst lengths. Based on the experimental results, the proposed techniques are used to analyze the impact of average burst length on the average decoded video quality. The proposed model is further extended to a more general form, and the modeled distortion is compared with simulation data. These experiments demonstrate that the extended model is also accurate for all tested loss rates.","PeriodicalId":397274,"journal":{"name":"2009 IEEE International Workshop on Multimedia Signal Processing","volume":"88 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128463095","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
Two-level indexing for high-dimensional range queries in peer-to-peer networks 对等网络中高维范围查询的两级索引
2009 IEEE International Workshop on Multimedia Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/MMSP.2009.5293339
Lelin Zhang, Zhiyong Wang, D. Feng
{"title":"Two-level indexing for high-dimensional range queries in peer-to-peer networks","authors":"Lelin Zhang, Zhiyong Wang, D. Feng","doi":"10.1109/MMSP.2009.5293339","DOIUrl":"https://doi.org/10.1109/MMSP.2009.5293339","url":null,"abstract":"Supporting complex and efficient lookup queries in peer-to-peer networks is challenging, though simple keyword based lookup queries are well supported by most deployed systems. This paper presents a two-level indexing structure built on Distributed Hash Table (DHT) aiming to support range queries on high-dimensional feature space in peer-to-peer network. Unlike most existing systems, where every node is responsible for a data partition, our design only utilizes a small part of the nodes to manage partitions. These partition nodes form the first level index. The second level index consists of one or more server nodes, which maintains links to each partition node. Additionally, a merge and split mechanism is designed to dynamically adjust the workload among nodes. Experimental results indicate that our system offers promising performance in terms of workload balance in churn networks. The flexibility to work with any DHT and the capability to support multiple feature spaces further make our proposed approach a feasible extension for file sharing networks.","PeriodicalId":397274,"journal":{"name":"2009 IEEE International Workshop on Multimedia Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129009625","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
Position based hardcopy watermarking for document authentication 用于文档认证的基于位置的硬拷贝水印
2009 IEEE International Workshop on Multimedia Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/MMSP.2009.5293294
Robinson Pizzio, J. Mayer
{"title":"Position based hardcopy watermarking for document authentication","authors":"Robinson Pizzio, J. Mayer","doi":"10.1109/MMSP.2009.5293294","DOIUrl":"https://doi.org/10.1109/MMSP.2009.5293294","url":null,"abstract":"This paper investigates hardcopy watermarking based on the embedding of transparent logos into documents. Grayscale logos are embedded into specific locations of the text document aiming communication over the print-and-scan (PS) channel. The authenticating message is encoded into the document by selecting the relative position of the logos. At the detector, the logo positions are estimated by correlation and an optimal detection threshold is derived considering a print-scan channel model. An error-rate analysis is provided for the method. By employing character segmentation, the technique can be also combined with other popular text hardcopy watermarking techniques. The method is verified to be robust for the PS channel with high transparency. Results illustrate the validity of the analyses and the applicability of the method to practical documents.","PeriodicalId":397274,"journal":{"name":"2009 IEEE International Workshop on Multimedia Signal Processing","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127781920","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
Visualising image databases 可视化图像数据库
2009 IEEE International Workshop on Multimedia Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/MMSP.2009.5293293
William Plant, G. Schaefer
{"title":"Visualising image databases","authors":"William Plant, G. Schaefer","doi":"10.1109/MMSP.2009.5293293","DOIUrl":"https://doi.org/10.1109/MMSP.2009.5293293","url":null,"abstract":"In this paper we explore different ways in which large collections of images can be visualised. We discuss the three principle visualisation techniques employed for this purpose, namely dimensionality reduced mappings, clustering-based visualisations and graph-based representations. Mapping-based techniques try to present the relationships between images described by high-dimensional features in a low-dimensional visualisation space. Clustered visualisations group similar images based on content, metadata or time stamp information, while in graph-based approaches links between images are exploited to arrive at an intuitive display of the dataset. We highlight advantages and disadvantages of the various approaches and emphasise the need for a benchmark which allows objective evaluation of these systems.","PeriodicalId":397274,"journal":{"name":"2009 IEEE International Workshop on Multimedia Signal Processing","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132332190","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
ConnectBoard: A remote collaboration system that supports gaze-aware interaction and sharing ConnectBoard:一个远程协作系统，支持注视感知交互和共享
2009 IEEE International Workshop on Multimedia Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/MMSP.2009.5293268
K. Tan, Ian N. Robinson, R. Samadani, Bowon Lee, Dan Gelb, Alex Vorbau, Bruce Culbertson, J. Apostolopoulos
{"title":"ConnectBoard: A remote collaboration system that supports gaze-aware interaction and sharing","authors":"K. Tan, Ian N. Robinson, R. Samadani, Bowon Lee, Dan Gelb, Alex Vorbau, Bruce Culbertson, J. Apostolopoulos","doi":"10.1109/MMSP.2009.5293268","DOIUrl":"https://doi.org/10.1109/MMSP.2009.5293268","url":null,"abstract":"We present ConnectBoard, a new system for remote collaboration where users experience natural interaction with one another, seemingly separated only by a vertical, transparent sheet of glass. It overcomes two key shortcomings of conventional video communication systems: the inability to seamlessly capture natural user interactions, like using hands to point and gesture at parts of shared documents, and the inability of users to look into the camera lens without taking their eyes off the display. We solve these problems by placing the camera behind the screen, where the remote user is virtually located. The camera sees through the display to capture images of the user. As a result, our setup captures natural, frontal views of users as they point and gesture at shared media displayed on the screen between them. Users also never have to take their eyes off their screens to look into the camera lens. Our novel optical solution based on wavelength multiplexing can be easily built with off-the-shelf components and does not require custom electronics for projector-camera synchronization.","PeriodicalId":397274,"journal":{"name":"2009 IEEE International Workshop on Multimedia Signal Processing","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131097839","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: 22
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书