Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026668
R. Lukac
A new generalisation of vector filters utilising the ordering of vector samples is provided. According to a distance function based on vector distances and vector angles, it is possible to differentiate vector median filters (VMFs), vector directional filters (VDFs) and finally directional distance filters (DDFs) that combine both distance and angles of vector samples in the vector space. For that reason, a class of DDFs represents a generalised class of vector filters. However, it will be shown that by introducing the weight vector to a DDF structure, all the above-mentioned filters, including their weighted structures, can be expressed as special cases of the proposed new class of weighted directional distance filters (WDDFs). Besides the theoretical acquisition, the proposed WDDFs provide a high design flexibility and these filters can be designed to achieve a significant improvement of the filter performance in comparison with standard vector filter classes.
{"title":"Another generalisation of vector filters","authors":"R. Lukac","doi":"10.1109/VIPROM.2002.1026668","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026668","url":null,"abstract":"A new generalisation of vector filters utilising the ordering of vector samples is provided. According to a distance function based on vector distances and vector angles, it is possible to differentiate vector median filters (VMFs), vector directional filters (VDFs) and finally directional distance filters (DDFs) that combine both distance and angles of vector samples in the vector space. For that reason, a class of DDFs represents a generalised class of vector filters. However, it will be shown that by introducing the weight vector to a DDF structure, all the above-mentioned filters, including their weighted structures, can be expressed as special cases of the proposed new class of weighted directional distance filters (WDDFs). Besides the theoretical acquisition, the proposed WDDFs provide a high design flexibility and these filters can be designed to achieve a significant improvement of the filter performance in comparison with standard vector filter classes.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115006169","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}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026621
D. Kedmenec, V. Kedmenec, M. Grgic, B. Zovko-Cihlar
Unified access to VPNs enables considerable flexibility in the way remote locations connect to a VPN. The overall design goal of this approach requires support for all services inherent to VPNs, including multimedia ones. The classical approach to building VPNs, such as ATM or frame relay, can enable strong support for multimedia traffic because of the ability to provide strict QoS guarantees. The architectural requirement of using IP as network protocol can lead to problems in the transport of multicast streams for VPNs based on classical networks. New approaches, such as MPLS VPNs, promise even greater flexibility and scalability through the use of native means for IP packet delivery. Methods that can provide multicast traffic transport in those approaches need to be investigated. Different access technologies have different characteristics regarding the ability to deliver multimedia traffic and are investigated in terms of their usefulness for such purposes.
{"title":"Enabling multimedia services in unified access network","authors":"D. Kedmenec, V. Kedmenec, M. Grgic, B. Zovko-Cihlar","doi":"10.1109/VIPROM.2002.1026621","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026621","url":null,"abstract":"Unified access to VPNs enables considerable flexibility in the way remote locations connect to a VPN. The overall design goal of this approach requires support for all services inherent to VPNs, including multimedia ones. The classical approach to building VPNs, such as ATM or frame relay, can enable strong support for multimedia traffic because of the ability to provide strict QoS guarantees. The architectural requirement of using IP as network protocol can lead to problems in the transport of multicast streams for VPNs based on classical networks. New approaches, such as MPLS VPNs, promise even greater flexibility and scalability through the use of native means for IP packet delivery. Methods that can provide multicast traffic transport in those approaches need to be investigated. Different access technologies have different characteristics regarding the ability to deliver multimedia traffic and are investigated in terms of their usefulness for such purposes.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115335908","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}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026682
R. Lukac
This paper focuses on a new three-dimensional vector filtering approach for the impulse noise suppression in noisy color image sequences. Like the vector median-based filters, the proposed method utilises a reduced ordering scheme. However, in order to approach the optimal filtering situation, when only affected samples are estimated whereas noisy image points are passed to a filter output without the change, the proposed method is controlled by the binary decision rule. As a switch between the identity filter (no filtering operation) and the vector median serves a simple comparison of the filter threshold and Euclidean distance between the central sample and the mean of several vector order-statistics with the smallest distances to the input samples. The proposed method is characterised by excellent results, especially in terms of the mean absolute error criteria.
{"title":"Vector order-statistics for impulse detection in noisy color image sequences","authors":"R. Lukac","doi":"10.1109/VIPROM.2002.1026682","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026682","url":null,"abstract":"This paper focuses on a new three-dimensional vector filtering approach for the impulse noise suppression in noisy color image sequences. Like the vector median-based filters, the proposed method utilises a reduced ordering scheme. However, in order to approach the optimal filtering situation, when only affected samples are estimated whereas noisy image points are passed to a filter output without the change, the proposed method is controlled by the binary decision rule. As a switch between the identity filter (no filtering operation) and the vector median serves a simple comparison of the filter threshold and Euclidean distance between the central sample and the mean of several vector order-statistics with the smallest distances to the input samples. The proposed method is characterised by excellent results, especially in terms of the mean absolute error criteria.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"366 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116262999","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}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026679
J. Krivic, F. Solina
This paper proposes a technique for object recognition using superquadric built models. Superquadrics, which are three dimensional models suitable for part-level representation of objects, are reconstructed from range images using the recover- and-select paradigm. Using an interpretation tree, the presence of an object in the scene from the model database can be hypothesized. These hypotheses are verified by projecting and refitting the object model to the range image which at the same time enables a better localization of the object in the scene.
{"title":"Part-level object recognition","authors":"J. Krivic, F. Solina","doi":"10.1109/VIPROM.2002.1026679","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026679","url":null,"abstract":"This paper proposes a technique for object recognition using superquadric built models. Superquadrics, which are three dimensional models suitable for part-level representation of objects, are reconstructed from range images using the recover- and-select paradigm. Using an interpretation tree, the presence of an object in the scene from the model database can be hypothesized. These hypotheses are verified by projecting and refitting the object model to the range image which at the same time enables a better localization of the object in the scene.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125212988","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}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026623
T. Zahariadis, S. Voliotis
Bandwidth capabilities of broadband networks have turned interactive multimedia services into a cost-effective reality, targeting not only large companies, but also SME and individual users. An application of multimedia networks and multicasting videoconference via the Internet with direct social impact is teleteaching and in the broader sense distance learning. In this paper, combining the WWW and the H.323/MPEG-4 protocol families, we specify an open system and network architecture towards the virtual networking classroom realisation. The proposed classroom incorporates both asynchronous courses, where the students can access on-line multimedia educational material whenever they are available, and synchronous courses, where the students are able to follow real-time lectures via state-of-the art videoconference techniques over the Internet.
{"title":"Networking multimedia classroom initiative","authors":"T. Zahariadis, S. Voliotis","doi":"10.1109/VIPROM.2002.1026623","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026623","url":null,"abstract":"Bandwidth capabilities of broadband networks have turned interactive multimedia services into a cost-effective reality, targeting not only large companies, but also SME and individual users. An application of multimedia networks and multicasting videoconference via the Internet with direct social impact is teleteaching and in the broader sense distance learning. In this paper, combining the WWW and the H.323/MPEG-4 protocol families, we specify an open system and network architecture towards the virtual networking classroom realisation. The proposed classroom incorporates both asynchronous courses, where the students can access on-line multimedia educational material whenever they are available, and synchronous courses, where the students are able to follow real-time lectures via state-of-the art videoconference techniques over the Internet.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133216855","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}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026631
X. Dai, J. Maeda
This paper proposes a fuzzy-based unsupervised segmentation of textured color images. L*a*b* color space is used to represent color features and statistical geometrical features (SGF) are adopted as texture descriptors. Homogeneity decision is used to make a fusion of texture features and color features with fuzzy-rule theory. Hierarchical segmentation based on the fuzzy homogeneity decision is performed in four processes: hierarchical splitting, local agglomerative merging, global agglomerative merging and pixelwise classification. Experiments on segmentation of some color texture mosaics and color natural images are presented to verify the effectiveness of the proposed segmentation approach.
{"title":"Unsupervised segmentation of textured color images using fuzzy homogeneity decision","authors":"X. Dai, J. Maeda","doi":"10.1109/VIPROM.2002.1026631","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026631","url":null,"abstract":"This paper proposes a fuzzy-based unsupervised segmentation of textured color images. L*a*b* color space is used to represent color features and statistical geometrical features (SGF) are adopted as texture descriptors. Homogeneity decision is used to make a fusion of texture features and color features with fuzzy-rule theory. Hierarchical segmentation based on the fuzzy homogeneity decision is performed in four processes: hierarchical splitting, local agglomerative merging, global agglomerative merging and pixelwise classification. Experiments on segmentation of some color texture mosaics and color natural images are presented to verify the effectiveness of the proposed segmentation approach.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132532306","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}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026659
B. Batagelj, P. Peer, F. Solina
We have designed a system with an intuitive user interface for remote camera control and image-based queries over the Internet. While searching for present solutions we realized the importance of a well-designed user interface. We developed a system, which enables remote observation and remote control of the JVC network camera over the Internet. The user interface is based on the combination of live video and a static panoramic view of a remote location. It provides a complete overview of a remote location and significantly simplifies the control over the Internet. By interactively moving a rectangular frame in the panoramic picture, the user locally selects the new direction of the camera. Visual summaries of activities at the observed location can be generated as well as custom queries with a simple user interface over the Internet.
{"title":"System for active video observation over the Internet","authors":"B. Batagelj, P. Peer, F. Solina","doi":"10.1109/VIPROM.2002.1026659","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026659","url":null,"abstract":"We have designed a system with an intuitive user interface for remote camera control and image-based queries over the Internet. While searching for present solutions we realized the importance of a well-designed user interface. We developed a system, which enables remote observation and remote control of the JVC network camera over the Internet. The user interface is based on the combination of live video and a static panoramic view of a remote location. It provides a complete overview of a remote location and significantly simplifies the control over the Internet. By interactively moving a rectangular frame in the panoramic picture, the user locally selects the new direction of the camera. Visual summaries of activities at the observed location can be generated as well as custom queries with a simple user interface over the Internet.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130699396","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}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026627
O. Dostál, M. Filka, M. Petrenko
The authors deal with transmitting, archiving, and sharing medical data between various modalities. The emphasis is on PACS, transmission media ( in this case the Metropolitan Academic Computer Network in Brno, Czech Republic) and interconnection of various types of hospitals and medical institutions.
{"title":"Multimedia communication transmission in medicine","authors":"O. Dostál, M. Filka, M. Petrenko","doi":"10.1109/VIPROM.2002.1026627","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026627","url":null,"abstract":"The authors deal with transmitting, archiving, and sharing medical data between various modalities. The emphasis is on PACS, transmission media ( in this case the Metropolitan Academic Computer Network in Brno, Czech Republic) and interconnection of various types of hospitals and medical institutions.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133639069","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}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026692
B. Cyganek, J. Borgosz
The paper presents an image processing software platform for implementation and evaluation of different stereo algorithms. It constitutes a self-contained image evaluation and testing platform, but also it can be used as a library that can be a part of a bigger image processing software. Thanks to its flexible and object oriented design it can be easily extended to comprise any new area or feature based stereo algorithm.
{"title":"Computer platform for evaluation of stereo image algorithms","authors":"B. Cyganek, J. Borgosz","doi":"10.1109/VIPROM.2002.1026692","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026692","url":null,"abstract":"The paper presents an image processing software platform for implementation and evaluation of different stereo algorithms. It constitutes a self-contained image evaluation and testing platform, but also it can be used as a library that can be a part of a bigger image processing software. Thanks to its flexible and object oriented design it can be easily extended to comprise any new area or feature based stereo algorithm.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"437 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125420953","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}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026686
R. Lancini, M. Fumagalli, E. Arsura
This paper proposes and implements a system to transmit in real-time slow video signals over the public network. The proposed codec is based on a multiple description approach whose advantage is an intrinsic robustness to the packet losses, as the simulation results have proved. This coding approach is important also for end user scalability since each device can decide the information to receive according to the display resolution and the connecting link bandwidth. The proposed system results are very suitable not only for IP networks but also for every packet network like the next generation mobile systems.
{"title":"Scalable and robust videoconference codec","authors":"R. Lancini, M. Fumagalli, E. Arsura","doi":"10.1109/VIPROM.2002.1026686","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026686","url":null,"abstract":"This paper proposes and implements a system to transmit in real-time slow video signals over the public network. The proposed codec is based on a multiple description approach whose advantage is an intrinsic robustness to the packet losses, as the simulation results have proved. This coding approach is important also for end user scalability since each device can decide the information to receive according to the display resolution and the connecting link bandwidth. The proposed system results are very suitable not only for IP networks but also for every packet network like the next generation mobile systems.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129599114","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：