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Mixing Images and Sketches for Retrieving Vector Drawings 混合图像和草图检索矢量图纸
Eurographics Multimedia Workshop Pub Date : 2004-10-27 DOI: 10.2312/EGMM/MM04/069-075
Alfredo Ferreira, Manuel J. Fonseca, J. Jorge, M. Ramalho
{"title":"Mixing Images and Sketches for Retrieving Vector Drawings","authors":"Alfredo Ferreira, Manuel J. Fonseca, J. Jorge, M. Ramalho","doi":"10.2312/EGMM/MM04/069-075","DOIUrl":"https://doi.org/10.2312/EGMM/MM04/069-075","url":null,"abstract":"Current approaches to content-based retrieval of multimedia data usually rely either on query by example or on sketches of the desired image, but not on both. In this paper, we propose a new query specification scheme, where digital images are combined with sketches, after vectorization, taking advantage of both methods. We selected a set of algorithms to perform image vectorization, taking into account the trade-off between vector image quality and processing time. This method of specifying queries is part of a system to retrieve vector drawings, which we briefly describe in this paper.","PeriodicalId":268090,"journal":{"name":"Eurographics Multimedia Workshop","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126716597","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
Image-based Rendering of the AnisotropicBRDF ofWoven Fabrics 基于图像的机织物各向异性brdf绘制
Eurographics Multimedia Workshop Pub Date : 2004-10-27 DOI: 10.2312/EGMM/MM04/135-143
Yuki Takeda, H. Viet, Hiromi T. Tanaka
{"title":"Image-based Rendering of the AnisotropicBRDF ofWoven Fabrics","authors":"Yuki Takeda, H. Viet, Hiromi T. Tanaka","doi":"10.2312/EGMM/MM04/135-143","DOIUrl":"https://doi.org/10.2312/EGMM/MM04/135-143","url":null,"abstract":"The reflectance of fabric surface is commonly represented by a 4D bidirectional reflectance distribution function (BRDF). To generate the BRDF from measured data by a gonioreflectometer with 2 degrees of freedom of the light source and 2 degrees of freedom of the observing direction, it requires an enormous amount of measurements. In this paper, we propose an efficient image-based method for rendering the anisotropic BRDF of woven fabrics based on the micro facet surface geometry determined by the cross-sectional shape of fibers, twist of yarns, and type of weave. At first, we examine the relationship between the reflectance properties and the micro facet surface geometry of a type of woven fabric such as silk-like synthesized fabric. Next, we develop an image-based method for generating the BRDF of woven fabrics from measurement of the reflectances caused by the incident light only in the direction perpendicular to the fabric's surface. The simulation results on arbitrarily colored dresses show the performance of the proposed approach.","PeriodicalId":268090,"journal":{"name":"Eurographics Multimedia Workshop","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129539379","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
Analysis of Inter-Frame Coding Without Intra Modes in H.264 H.264无帧内模式的帧间编码分析
Eurographics Multimedia Workshop Pub Date : 2004-10-27 DOI: 10.2312/EGMM/MM04/077-086
Yun Cheng, Zhiying Wang, Kui Dai, Jianjun Guo
{"title":"Analysis of Inter-Frame Coding Without Intra Modes in H.264","authors":"Yun Cheng, Zhiying Wang, Kui Dai, Jianjun Guo","doi":"10.2312/EGMM/MM04/077-086","DOIUrl":"https://doi.org/10.2312/EGMM/MM04/077-086","url":null,"abstract":"H.264/AVC is a new international standard for video coding which has great advantage of coding efficiency com-pared with other standards. It can save about 50% bit-rate compared with that of the successful prior coding stan-dards under the same reconstructed picture quality. But the high coding efficiency is acquired by heavily computa-tion. In this paper, the coding mode and algorithm for mode decision are introduced firstly, then transform and quantization are analyzed and experiments on inter-frame coding with or without intra modes are performed. The experiment results illustrate that the encoding method without intra modes in inter-frame coding will decrease the encoding time from 76.03% to 50.09% compared with that of the standard encoding method, while the PSNR-Y will change from -0.45dB to +0.20dB (most cases are ±0.10dB) at the same bit-rates.","PeriodicalId":268090,"journal":{"name":"Eurographics Multimedia Workshop","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114946106","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
Animating Peer-Level Annotations Within Web-Based Multimedia 在基于web的多媒体中动画对等级别注释
Eurographics Multimedia Workshop Pub Date : 2004-10-27 DOI: 10.2312/EGMM/MM04/049-057
D. Bulterman
{"title":"Animating Peer-Level Annotations Within Web-Based Multimedia","authors":"D. Bulterman","doi":"10.2312/EGMM/MM04/049-057","DOIUrl":"https://doi.org/10.2312/EGMM/MM04/049-057","url":null,"abstract":"The TabletPC is an example of a new generation of user interface device where pen-based manipulation of information is integrated directly into a user's workflow. Using the TabletPC's existing pen and electronic ink systems, a wide range of static documents can be created or annotated. While the facilities of the TabletPC are useful for creating virtual images containing ink that can be overlaid on text or picture context, there is little support for creating annotations of time-based content such as video. \u0000 \u0000This article describes an annotation authoring model and interface for creating peer-level annotations to video media. Peer-level annotations allow existing content to be enriched with additional content annotations that can be co-presented with the original media. A system for creating a SMIL language document containing SVG-based annotations that exist along-side the visual content is described, along with a discussion of the needs and limitations of supporting video markup in a web context. An example using peer-level annotations in a medical context is provided.","PeriodicalId":268090,"journal":{"name":"Eurographics Multimedia Workshop","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129806924","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: 17
Optimum Detection of MultiplicativeWatermarks for Digital Images in the DWT Domain DWT域数字图像相乘水印的优化检测
Eurographics Multimedia Workshop Pub Date : 2004-10-27 DOI: 10.2312/EGMM/MM04/173-179
Zhongwei Sun, D. Feng, Rui Xue
{"title":"Optimum Detection of MultiplicativeWatermarks for Digital Images in the DWT Domain","authors":"Zhongwei Sun, D. Feng, Rui Xue","doi":"10.2312/EGMM/MM04/173-179","DOIUrl":"https://doi.org/10.2312/EGMM/MM04/173-179","url":null,"abstract":"Watermark detection plays a crucial role in digital watermarking. It has traditionally been tackled using correla-tion-based techniques. However, the correlation-based detection is not the optimum choice when the host media doesn't follow a gaussian distribution or the watermark is not embedded in the host media in an additive way. A discrete wavelet transform (DWT) domain multiplicative watermark detection algorithm for digital images is propo-sed in this paper, which exploits the imperceptibility constraint of watermarking. By formulating the watermark detection as weak signal detection in non-gaussian noise, the proposed algorithm is derived according to statistical inference theory. With the wavelet coefficients modeled by generalized gaussian distribution (GGD), the optimum decision threshold for the detector is obtained by applying Neyman-pearson criteria. The superiority of the novel detector in performance is confirmed through Monte Carlo simulations.","PeriodicalId":268090,"journal":{"name":"Eurographics Multimedia Workshop","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132383350","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
A Novel Quadtree-Structured Scheme for Transmitting Chinese Calligraphy Progressively 一种新的四叉树结构的汉字渐进式传输方案
Eurographics Multimedia Workshop Pub Date : 2004-10-27 DOI: 10.2312/EGMM/MM04/095-103
Chinchen Chang, Chien-Fa Li, I. Lin
{"title":"A Novel Quadtree-Structured Scheme for Transmitting Chinese Calligraphy Progressively","authors":"Chinchen Chang, Chien-Fa Li, I. Lin","doi":"10.2312/EGMM/MM04/095-103","DOIUrl":"https://doi.org/10.2312/EGMM/MM04/095-103","url":null,"abstract":"Progressive image transmission (PIT) techniques are useful in Web applications. A user can get a rough preview of an image and decide if the entire detail of a picture needs to be transmitted, especially when the network bandwidth is restricted. In this paper, we propose a new progressive image transmission scheme for Chinese calligraphy. Because the colors used in Chinese calligraphy are very simple, we can apply the quadtree-structure to transmit the calligraphy progressively. The preliminary results show that transmitted bits can be saved in the first few rounds. The PSNR values in the first few rounds are much better than other PIT techniques.","PeriodicalId":268090,"journal":{"name":"Eurographics Multimedia Workshop","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125212711","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
A Segmentation Algorithmfor Jacquard Images Based on Mumford-ShahModel 基于mumford - shah模型的提花图像分割算法
Eurographics Multimedia Workshop Pub Date : 2004-10-27 DOI: 10.2312/EGMM/MM04/153-162
Zhilin Feng, Jianwei Yin, Gang Chen, Yang Liu, Jinxiang Dong
{"title":"A Segmentation Algorithmfor Jacquard Images Based on Mumford-ShahModel","authors":"Zhilin Feng, Jianwei Yin, Gang Chen, Yang Liu, Jinxiang Dong","doi":"10.2312/EGMM/MM04/153-162","DOIUrl":"https://doi.org/10.2312/EGMM/MM04/153-162","url":null,"abstract":"Automatic pattern segmentation of jacquard images is a challenging task due to the complexity of the images. Active contour models have become popular for finding the contours of a pattern with a complex shape. However, these models have many limitations on the pattern segmentation of jacquard images in the presence of noise. In this paper, a robust algorithm based on the Mumford-Shah model is proposed for the segmentation of noisy jacquard images. We discretize the Mumford-Shah model on piecewise lin-ear finite element spaces to yield greater stability and higher accuracy. A novel iterative relaxation algo-rithm for the numerical solving of the discrete version of the Mumford-Shah model is presented. During each iteration, we first refine and reorganize an adaptive triangular mesh to characterize the essential contour structure of a pattern. Then, we apply the quasi-Newton algorithm to find the absolute minimum of the discrete version of the model at the current iteration. Experimental results on synthetic and jac-quard images have shown the effectiveness and robustness of the algorithm.","PeriodicalId":268090,"journal":{"name":"Eurographics Multimedia Workshop","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129410987","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
Simultaneous Tracking of Multiple Objects for Augmented Reality Applications 用于增强现实应用的多目标同步跟踪
Eurographics Multimedia Workshop Pub Date : 2004-10-27 DOI: 10.2312/EGMM/MM04/041-047
C. Yuan
{"title":"Simultaneous Tracking of Multiple Objects for Augmented Reality Applications","authors":"C. Yuan","doi":"10.2312/EGMM/MM04/041-047","DOIUrl":"https://doi.org/10.2312/EGMM/MM04/041-047","url":null,"abstract":"This paper presents an appearance-based image processing and tracking algorithm which is applied in a distributed Augmented Reality (AR) system. The tracker is computer vision based and is capable of simultaneous tracking of multiple objects. These objects are called place holder objects (PHOs), as they are used as interface elements and act as tangible interfaces for handling and interacting with virtual artifacts. The tracking system uses a fix mounted camera viewing at the workspace — a normal round table. All the PHOs are placed on the table and can be moved arbitrarily around, allowing both in-plane and out-of-plane rotations. In order to track and differentiate the PHOs in real-time, we apply an appearance-based object modeling. The utilization of appearance-based method for object recognition and tracking gives the system a distinct advantage in that it is computationally less expensive and it can be easily adapted to work with arbitrary PHOs by simply using an off-line training process.","PeriodicalId":268090,"journal":{"name":"Eurographics Multimedia Workshop","volume":"188 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122977860","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: 5
A New Fingerprint Image Segmentation Algorithm Based on ROIO 基于ROIO的指纹图像分割新算法
Eurographics Multimedia Workshop Pub Date : 2004-10-27 DOI: 10.2312/EGMM/MM04/145-151
Z. Shi, Ke Xu, Yangsheng Wang
{"title":"A New Fingerprint Image Segmentation Algorithm Based on ROIO","authors":"Z. Shi, Ke Xu, Yangsheng Wang","doi":"10.2312/EGMM/MM04/145-151","DOIUrl":"https://doi.org/10.2312/EGMM/MM04/145-151","url":null,"abstract":"We present a new fast and effective method of fingerprint image segmentation, which is different from traditio-nal methods that usually use some certain features to segment diversified images. Based on the region of inte-rest, an approach is introduce, which is specialized on preprocessing a certain kind of bad fingerprint images with a great many blurs, false traces and sweat spots. It just mimics the way of finding region of interest by human beings and locating the area of low intensities quickly. Experimental result shows a significant improve-ment in fingerprint segmentation performance.","PeriodicalId":268090,"journal":{"name":"Eurographics Multimedia Workshop","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121259655","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
A Training-Based Method for Reducing Ringing Artifact in BDCT-Encoded Images 一种基于训练的减少bdct编码图像中环形伪影的方法
Eurographics Multimedia Workshop Pub Date : 2004-10-27 DOI: 10.2312/EGMM/MM04/105-113
Guangyu Wang, T. Wong, P. Heng
{"title":"A Training-Based Method for Reducing Ringing Artifact in BDCT-Encoded Images","authors":"Guangyu Wang, T. Wong, P. Heng","doi":"10.2312/EGMM/MM04/105-113","DOIUrl":"https://doi.org/10.2312/EGMM/MM04/105-113","url":null,"abstract":"The quantization procedure of block-based discrete cosine transform (BDCT) compression (such as JPEG) introduces annoying visual artifact. In this paper, we propose a novel training-based method to reduce the ringing artifact in BDCT-encoded high-contrast images (images with large smooth color areas and strong edges/outlines). Our main focus is on the removal of ringing artifact that is seldom addressed by existing methods. In the proposed method, the contaminated image is modeled as a Markov random field (MRF). We 'learn' the behavior of contamination by extracting massive number of artifact patterns from a training set. To organize the extracted artifact patterns, we use the tree-structured vector quantization (TSVQ). Instead of post-filtering the input contaminated image, we synthesize an artifact-reduced image. We show that substantial improvement (both statistical and visual) is achieved using the proposed method. Moreover, since our method is non-iterative, it can remove artifact within a very short period of time.","PeriodicalId":268090,"journal":{"name":"Eurographics Multimedia Workshop","volume":"141 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128812430","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
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