Recognition of hand gestures associated with different alphabets is a very important research area. The persons with vocal and hearing disabilities may benefit a lot from this research. The communication gap between these and normal persons can be filled by providing an aid in the form of a computerized translation of different hand gestures. In this paper, we have developed a recognition system to translate hand gestures into Urdu alphabets. We have formulated a comprehensive classification scheme which is core to this recognition system. The accuracy rate of our approach is 97.4% which is better than the previous approaches.
{"title":"Recognition and Translation of Hand Gestures to Urdu Alphabets Using a Geometrical Classification","authors":"Huma Tauseef, M. A. Fahiem, Saima Farhan","doi":"10.1109/VIZ.2009.11","DOIUrl":"https://doi.org/10.1109/VIZ.2009.11","url":null,"abstract":"Recognition of hand gestures associated with different alphabets is a very important research area. The persons with vocal and hearing disabilities may benefit a lot from this research. The communication gap between these and normal persons can be filled by providing an aid in the form of a computerized translation of different hand gestures. In this paper, we have developed a recognition system to translate hand gestures into Urdu alphabets. We have formulated a comprehensive classification scheme which is core to this recognition system. The accuracy rate of our approach is 97.4% which is better than the previous approaches.","PeriodicalId":315752,"journal":{"name":"2009 Second International Conference in Visualisation","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126734523","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}
The building construction activity is uncertain by nature because of its specificities (e.g. heterogeneous stakeholders, ephemeral teams, etc.) and particularly, because it corresponds to a particular mode of production "on site" and is submitted to variable conditions. So the construction management is essential to guarantee the correct progression of the construction activity. Moreover, trust is a central component in this type of activity to surmount the uncertainty. Therefore, we suggest making a connection between the coordination assistance tool and the notion of trust. This paper suggests representing trust in the correct progression of the activity in order to support the construction management and using this representation to guide user navigation in a multi-visualization environment. It will describe a methodology to identify trust information in a construction activity context, measure trust value and implement a trust-based prototype.
{"title":"Trust-Oriented Multi-visualization of Cooperation Context","authors":"A. Guerriero, S. Kubicki, G. Halin","doi":"10.1109/VIZ.2009.48","DOIUrl":"https://doi.org/10.1109/VIZ.2009.48","url":null,"abstract":"The building construction activity is uncertain by nature because of its specificities (e.g. heterogeneous stakeholders, ephemeral teams, etc.) and particularly, because it corresponds to a particular mode of production \"on site\" and is submitted to variable conditions. So the construction management is essential to guarantee the correct progression of the construction activity. Moreover, trust is a central component in this type of activity to surmount the uncertainty. Therefore, we suggest making a connection between the coordination assistance tool and the notion of trust. This paper suggests representing trust in the correct progression of the activity in order to support the construction management and using this representation to guide user navigation in a multi-visualization environment. It will describe a methodology to identify trust information in a construction activity context, measure trust value and implement a trust-based prototype.","PeriodicalId":315752,"journal":{"name":"2009 Second International Conference in Visualisation","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116502563","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}
Zhihua Chen, Shengxi Wu, Hong Zheng, Weiwen Meng, Xin Xu
It is a difficult task to create a realistic human animation because of the high complexity of human motion. To address this problem, a new method is presented for producing physically valid motion with example motions. The core of our method is physics-based space-time optimization (PBSO). PBSO introduces physical constraints into conventional space-time optimization and then ensure the physical reality of the edited motion. The intermediate model is employed to solve the convergence of optimization process. The original motion is transformed into the simplified motion and then edited. Experiments shows the captured motion data can be correctly copied to a new character or new path with the approach.
{"title":"Creating Realistic Human Motions with PBSO","authors":"Zhihua Chen, Shengxi Wu, Hong Zheng, Weiwen Meng, Xin Xu","doi":"10.1109/VIZ.2009.51","DOIUrl":"https://doi.org/10.1109/VIZ.2009.51","url":null,"abstract":"It is a difficult task to create a realistic human animation because of the high complexity of human motion. To address this problem, a new method is presented for producing physically valid motion with example motions. The core of our method is physics-based space-time optimization (PBSO). PBSO introduces physical constraints into conventional space-time optimization and then ensure the physical reality of the edited motion. The intermediate model is employed to solve the convergence of optimization process. The original motion is transformed into the simplified motion and then edited. Experiments shows the captured motion data can be correctly copied to a new character or new path with the approach.","PeriodicalId":315752,"journal":{"name":"2009 Second International Conference in Visualisation","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130754417","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}
N. Adamo-Villani, R. Wilbur, Petra Eccarius, Laverne Abe-Harris
This paper reports a study that aimed to determine whether character geometric model (i.e. segmented vs.seamless) has an effect on how animated signing is perceived by viewers. Additionally, the study investigated whether the geometric model affects perception at varying degrees of linguistic complexity--specifically handshape complexity. We modeled and animated two polygonal 3D characters: Torrents,one seamless mesh, and Robby, a fully segmented avatar. Both characters had similar geometrical proportions, identical skeletal systems, similar visual styles and color schemes, and met standards of good character design. Each signed 60stimulus signs, divided into three groups—those with simple(group I), moderately complex (group II), and complex (groupIII) handshapes according to factors established in the linguistic literature. 53 participants, who learned ASL by age5, viewed animated clips in random order via web survey. They(1) identified the sign (if recognizable), and (2) rated its realism using a 5-point Likert scale. Findings show that the seamless avatar (Torrents) was rated highest, and simple handshapes were rated higher than moderately complex and complex ones.The interaction between character and handshape complexity was also significant. For Robby (more than for Torrents),ratings decreased as handshape complexity increased. The lower ratings for Robby could indicate a preference for seamless, deformable characters over segmented ones, especially in signs with complex handshapes.
{"title":"Effects of Character Geometric Model on Perception of Sign Language Animation","authors":"N. Adamo-Villani, R. Wilbur, Petra Eccarius, Laverne Abe-Harris","doi":"10.1109/VIZ.2009.23","DOIUrl":"https://doi.org/10.1109/VIZ.2009.23","url":null,"abstract":"This paper reports a study that aimed to determine whether character geometric model (i.e. segmented vs.seamless) has an effect on how animated signing is perceived by viewers. Additionally, the study investigated whether the geometric model affects perception at varying degrees of linguistic complexity--specifically handshape complexity. We modeled and animated two polygonal 3D characters: Torrents,one seamless mesh, and Robby, a fully segmented avatar. Both characters had similar geometrical proportions, identical skeletal systems, similar visual styles and color schemes, and met standards of good character design. Each signed 60stimulus signs, divided into three groups—those with simple(group I), moderately complex (group II), and complex (groupIII) handshapes according to factors established in the linguistic literature. 53 participants, who learned ASL by age5, viewed animated clips in random order via web survey. They(1) identified the sign (if recognizable), and (2) rated its realism using a 5-point Likert scale. Findings show that the seamless avatar (Torrents) was rated highest, and simple handshapes were rated higher than moderately complex and complex ones.The interaction between character and handshape complexity was also significant. For Robby (more than for Torrents),ratings decreased as handshape complexity increased. The lower ratings for Robby could indicate a preference for seamless, deformable characters over segmented ones, especially in signs with complex handshapes.","PeriodicalId":315752,"journal":{"name":"2009 Second International Conference in Visualisation","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133791431","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}
This paper describes an innovative development in the Cardiff School of Art and Design, whereby architectural design and technology students upload their 3D CAD based Building Information Models (BIM) in Industry Foundation Class (IFC) file format to a project website, for evaluation by their peers deploying automated code compliance model checking software, and receive feedback and commentary through the same website. The use of automated compliance checking software has already been found to accessibly and visibly demonstrate that a much wider range of useful information than the purely pictorial can be measured, calculated, and derived from the model once constructed. This begins to expose students to those forms of information, beyond simple communication between designer and constructor, that are likely to be needed in analyzing and delivering sustainable design and performance throughout the operational lifecycle of the building to its eventual demolition and re-cycle.
{"title":"Web-Mediated Student Peer Group Assessment of Building Information Modelling Performance","authors":"N. Evans, J. Counsell","doi":"10.1109/VIZ.2009.34","DOIUrl":"https://doi.org/10.1109/VIZ.2009.34","url":null,"abstract":"This paper describes an innovative development in the Cardiff School of Art and Design, whereby architectural design and technology students upload their 3D CAD based Building Information Models (BIM) in Industry Foundation Class (IFC) file format to a project website, for evaluation by their peers deploying automated code compliance model checking software, and receive feedback and commentary through the same website. The use of automated compliance checking software has already been found to accessibly and visibly demonstrate that a much wider range of useful information than the purely pictorial can be measured, calculated, and derived from the model once constructed. This begins to expose students to those forms of information, beyond simple communication between designer and constructor, that are likely to be needed in analyzing and delivering sustainable design and performance throughout the operational lifecycle of the building to its eventual demolition and re-cycle.","PeriodicalId":315752,"journal":{"name":"2009 Second International Conference in Visualisation","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127556037","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}
The incidence of melanoma rises rapidly in Caucasians after the age of 20, and US statistics show about 1million new cases every year. Specialists in the field are highly accurate in determining whether a skin lesion is cancerous or not based solely on a visual inspection. No systems exist for accurately classifying skin spots.The first stage in the development of such a system is to identify the region of interest. This paper reviews approaches to using three edge detection algorithms for edge detection – and therefore extraction of the lesion from the surrounding skin.The three edge detection algorithms used are Sobel, Marr-Hildreth and Canny. Their performance is compared for 136images of both cancerous and non-cancerous lesions.Depending on the images, the best results are obtained either by Canny or by the Marr-Hildreth algorithm, however the edges produced by the latter are indistinct and the processing time is four times that of the other algorithms.
{"title":"Identification of Cancerous Lesions in Unconstrained Images","authors":"J. Cowell, Joaquim Mesquita da Cunha Viana","doi":"10.1109/VIZ.2009.43","DOIUrl":"https://doi.org/10.1109/VIZ.2009.43","url":null,"abstract":"The incidence of melanoma rises rapidly in Caucasians after the age of 20, and US statistics show about 1million new cases every year. Specialists in the field are highly accurate in determining whether a skin lesion is cancerous or not based solely on a visual inspection. No systems exist for accurately classifying skin spots.The first stage in the development of such a system is to identify the region of interest. This paper reviews approaches to using three edge detection algorithms for edge detection – and therefore extraction of the lesion from the surrounding skin.The three edge detection algorithms used are Sobel, Marr-Hildreth and Canny. Their performance is compared for 136images of both cancerous and non-cancerous lesions.Depending on the images, the best results are obtained either by Canny or by the Marr-Hildreth algorithm, however the edges produced by the latter are indistinct and the processing time is four times that of the other algorithms.","PeriodicalId":315752,"journal":{"name":"2009 Second International Conference in Visualisation","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125101665","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}
Efficient algorithms for compressing three-dimensional (3D) triangle meshes have been widely developed in recent years, but most of them are designed to deal with manifold meshes. A progressive geometry-driven 3D triangle meshes algorithm is proposed in this work which can be easily extended to non-manifold mesh compression and polygon mesh compression. Different from connectivity-driven algorithms; our method starts with the geometry; it encodes the geometry data into a symbol sequence consisting of only three kinds of symbols. Edge collapse and vertex unification operator are used to encode the connectivity, and the symbol sequences can be further encoded by arithmetic coding.
{"title":"Progressive Geometry-Driven Compression for Triangle Mesh Based on Binary Tree","authors":"Liu Hongnian, Liu Bo, Z. Hongbin","doi":"10.1109/VIZ.2009.17","DOIUrl":"https://doi.org/10.1109/VIZ.2009.17","url":null,"abstract":"Efficient algorithms for compressing three-dimensional (3D) triangle meshes have been widely developed in recent years, but most of them are designed to deal with manifold meshes. A progressive geometry-driven 3D triangle meshes algorithm is proposed in this work which can be easily extended to non-manifold mesh compression and polygon mesh compression. Different from connectivity-driven algorithms; our method starts with the geometry; it encodes the geometry data into a symbol sequence consisting of only three kinds of symbols. Edge collapse and vertex unification operator are used to encode the connectivity, and the symbol sequences can be further encoded by arithmetic coding.","PeriodicalId":315752,"journal":{"name":"2009 Second International Conference in Visualisation","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116240434","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}
The paper approaches an educational application of 3D dynamic interactive images of medical devices. Manuals containing 3D images are considered more efficient than classic manuals. Combination of 3D interactive images with World Wide Web technologies makes the educational activities and especially the e-learning more attractive. Some web technologies used in creation of 3D interactivity were compared in order to choose a suitable environment for learning in the field of medical devices. Results of the study were used in the elaboration of an international e-learning platform in the frame of the Leonardo da Vinci educational program. The originality of the project consists in the interactivity of 3D images used in lessons.
{"title":"The Use of Dynamic Interactive 3D Images of Biomedical Devices in Education","authors":"O. Ciobanu, S. Tornincasa","doi":"10.1109/VIZ.2009.15","DOIUrl":"https://doi.org/10.1109/VIZ.2009.15","url":null,"abstract":"The paper approaches an educational application of 3D dynamic interactive images of medical devices. Manuals containing 3D images are considered more efficient than classic manuals. Combination of 3D interactive images with World Wide Web technologies makes the educational activities and especially the e-learning more attractive. Some web technologies used in creation of 3D interactivity were compared in order to choose a suitable environment for learning in the field of medical devices. Results of the study were used in the elaboration of an international e-learning platform in the frame of the Leonardo da Vinci educational program. The originality of the project consists in the interactivity of 3D images used in lessons.","PeriodicalId":315752,"journal":{"name":"2009 Second International Conference in Visualisation","volume":"6 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114007823","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}
Character segmentation forms the basis for optical character recognition. In this paper, we have proposed a character segmentation approach for printed Urdu script. Urdu is cursive by nature and its script is written from right to left. Both these factors make the segmentation more difficult and require special attention. Our approach is based on structural features and we have overcome different problems like over segmentation and under segmentation, present in previous approaches. We have achieved an accuracy rate of 99.4% which is better than others. The approach may be very useful for developing an optical character recognition system for Urdu language.
{"title":"Segmentation of Printed Urdu Scripts Using Structural Features","authors":"Hamna Malik, M. A. Fahiem","doi":"10.1109/VIZ.2009.12","DOIUrl":"https://doi.org/10.1109/VIZ.2009.12","url":null,"abstract":"Character segmentation forms the basis for optical character recognition. In this paper, we have proposed a character segmentation approach for printed Urdu script. Urdu is cursive by nature and its script is written from right to left. Both these factors make the segmentation more difficult and require special attention. Our approach is based on structural features and we have overcome different problems like over segmentation and under segmentation, present in previous approaches. We have achieved an accuracy rate of 99.4% which is better than others. The approach may be very useful for developing an optical character recognition system for Urdu language.","PeriodicalId":315752,"journal":{"name":"2009 Second International Conference in Visualisation","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114455218","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}
E. Zudilova-Seinstra, P. Sloot, P. Koning, Avan Suinesiaputra, R. Geest, J. Reiber
We describe a series of experiments that compared the 2D and 3D input methods for selection and positioning tasks related to medical image analysis. For this study, we chose a switchable P5 Glove Controller, which can be used to provide both 2DOF and 6DOF input control. Our results suggest that for both tasks the overall completion time and accuracy can be improved when the input device with more degrees of freedom is used for manipulation of the visualized medical data. However, 3D input appeared to be more beneficial for the positioning task than for the selection task.
{"title":"Exploring 2D/3D Input Techniques for Medical Image Analysis","authors":"E. Zudilova-Seinstra, P. Sloot, P. Koning, Avan Suinesiaputra, R. Geest, J. Reiber","doi":"10.1109/VIZ.2009.18","DOIUrl":"https://doi.org/10.1109/VIZ.2009.18","url":null,"abstract":"We describe a series of experiments that compared the 2D and 3D input methods for selection and positioning tasks related to medical image analysis. For this study, we chose a switchable P5 Glove Controller, which can be used to provide both 2DOF and 6DOF input control. Our results suggest that for both tasks the overall completion time and accuracy can be improved when the input device with more degrees of freedom is used for manipulation of the visualized medical data. However, 3D input appeared to be more beneficial for the positioning task than for the selection task.","PeriodicalId":315752,"journal":{"name":"2009 Second International Conference in Visualisation","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124822905","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}
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