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"abstract": "Abstract—This paper presents a new approach to 3D shape metamorphosis. We express the interpolation of two shapes as a process where one shape deforms to maximize its similarity with another shape. The process incrementally optimizes an objective function while deforming an implicit surface model. We represent the deformable surface as a level set (iso-surface) of a densely sampled scalar function of three dimensions. Such level-set models have been shown to mimic conventional parametric deformable surface models by encoding surface movements as changes in the grayscale values of a volume data set. Thus, a well-founded mathematical structure leads to a set of procedures that describes how voxel values can be manipulated to create deformations that are represented as a sequence of volumes. The result is a 3D morphing method that offers several advantages over previous methods, including minimal need for user input, no model parameterization, flexible topology, and subvoxel accuracy.",
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"abstract": "Abstract—Active contour and surface models, also known as deformable models, are powerful image segmentation techniques. Geometric deformable models implemented using level set methods have advantages over parametric models due to their intrinsic behavior, parameterization independence, and ease of implementation. However, a long claimed advantage of geometric deformable models—the ability to automatically handle topology changes—turns out to be a liability in applications where the object to be segmented has a known topology that must be preserved. In this paper, we present a new class of geometric deformable models designed using a novel topology-preserving level set method, which achieves topology preservation by applying the simple point concept from digital topology. These new models maintain the other advantages of standard geometric deformable models including subpixel accuracy and production of nonintersecting curves or surfaces. Moreover, since the topology-preserving constraint is enforced efficiently through local computations, the resulting algorithm incurs only nominal computational overhead over standard geometric deformable models. Several experiments on simulated and real data are provided to demonstrate the performance of this new deformable model algorithm.",
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"content": "Abstract—Active contour and surface models, also known as deformable models, are powerful image segmentation techniques. Geometric deformable models implemented using level set methods have advantages over parametric models due to their intrinsic behavior, parameterization independence, and ease of implementation. However, a long claimed advantage of geometric deformable models—the ability to automatically handle topology changes—turns out to be a liability in applications where the object to be segmented has a known topology that must be preserved. In this paper, we present a new class of geometric deformable models designed using a novel topology-preserving level set method, which achieves topology preservation by applying the simple point concept from digital topology. These new models maintain the other advantages of standard geometric deformable models including subpixel accuracy and production of nonintersecting curves or surfaces. Moreover, since the topology-preserving constraint is enforced efficiently through local computations, the resulting algorithm incurs only nominal computational overhead over standard geometric deformable models. Several experiments on simulated and real data are provided to demonstrate the performance of this new deformable model algorithm.",
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"abstract": "2013 marked a wonderful year for IEEE TKDE (Transactions on Knowledge and Data Engineering). While the statistics for November and December 2013 were not available when this editorial was written, TKDE received 822 submissions in the first 10 months of 2013. Among those submissions, 601 received their first round reviews, 20 submissions were invited for minor revision, 150 submissions were invited for major revision, 243 submissions were declined, and 188 were administratively rejected mainly due to topics out of the scope and clear incompetence in technical quality. Final decisions on 458 of those 822 submissions were made, among which 21 were accepted, while there are many other submissions that are still under revision or the second round review. In total, 125 submissions have been accepted in the first 10 months of 2013, including those submitted in 2013 and earlier. The statistics show that TKDE is in a healthy and fruitful state and, at the same time, remains a highly competitive venue for academic publication. I want to thank all authors who submitted to TKDE, and all reviewers and associate editors who helped to run the submission selection process as smoothly as it can be. Your consistent contributions and support make TKDE a fruitful and professional journal. I want to sincerely thank the four associate editors who finished their terms in the second half of 2013: Drs. Elena Ferrari, Wook-Shin Han, Haixun Wang, and Aidong Zhang. Their significant contributions to the quality and reputation of TKDE have benefited many authors, readers, and reviewers. At the same time, I want to officially welcome the six associate editors who joined the editorial board in the second half of 2013: Drs. Eamonn Keogh, Feifei Li, Tao Li, Ee-Peng Lim, Stan Matwin, and Myra Spiliopoulou. Particularly, Eamonn Keogh has been kind enough to rejoin the TKDE editorial board after he retired from his first service several years ago. This group of newly appointed associate editors represents our interest and determination in recruiting the most established and active working experts in the wonderful wide spectrum of knowledge and data engineering. Moreover, they are very committed and dedicated to serving the community and handling the review processes, as testified by their rich experience.",
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"content": "2013 marked a wonderful year for IEEE TKDE (Transactions on Knowledge and Data Engineering). While the statistics for November and December 2013 were not available when this editorial was written, TKDE received 822 submissions in the first 10 months of 2013. Among those submissions, 601 received their first round reviews, 20 submissions were invited for minor revision, 150 submissions were invited for major revision, 243 submissions were declined, and 188 were administratively rejected mainly due to topics out of the scope and clear incompetence in technical quality. Final decisions on 458 of those 822 submissions were made, among which 21 were accepted, while there are many other submissions that are still under revision or the second round review. In total, 125 submissions have been accepted in the first 10 months of 2013, including those submitted in 2013 and earlier. The statistics show that TKDE is in a healthy and fruitful state and, at the same time, remains a highly competitive venue for academic publication. I want to thank all authors who submitted to TKDE, and all reviewers and associate editors who helped to run the submission selection process as smoothly as it can be. Your consistent contributions and support make TKDE a fruitful and professional journal. I want to sincerely thank the four associate editors who finished their terms in the second half of 2013: Drs. Elena Ferrari, Wook-Shin Han, Haixun Wang, and Aidong Zhang. Their significant contributions to the quality and reputation of TKDE have benefited many authors, readers, and reviewers. At the same time, I want to officially welcome the six associate editors who joined the editorial board in the second half of 2013: Drs. Eamonn Keogh, Feifei Li, Tao Li, Ee-Peng Lim, Stan Matwin, and Myra Spiliopoulou. Particularly, Eamonn Keogh has been kind enough to rejoin the TKDE editorial board after he retired from his first service several years ago. This group of newly appointed associate editors represents our interest and determination in recruiting the most established and active working experts in the wonderful wide spectrum of knowledge and data engineering. Moreover, they are very committed and dedicated to serving the community and handling the review processes, as testified by their rich experience.",
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"title": "Editorial [State of the Transactions]",
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"issue": {
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"title": "April",
"year": "2018",
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"abstract": "We are pleased to present the technical papers for IEEE VR 2018: the 25th IEEE Conference on Virtual Reality and 3D User Interfaces, held March 18-22, 2018 in Reutlingen, Germany. IEEE VR 2018 features two categories of submissions: (i) VR Journal Papers, and (ii) VR Conference Papers. Both categories have their own program committees, submission processes, and review processes. This year, 178 submissions were submitted to the Journal track from which 29 were accepted as articles to IEEE TVCG (16.3%). All of these will be presented at the IEEE VR 2018 conference, along with 6 additional papers in the VR area that were published in IEEE TVCG during the past year. Furthermore, 6 submission (3.4%) were recommended for a regular issue of TVCG with major revisions with reviewer continuity. Each of the papers in this special issue went through a rigorous two-round review process. All accepted journal papers are published in a special issue of IEEE Transactions on Visualization and Computer Graphics (TVCG). The Proceedings of the IEEE Conference on Virtual Reality and 3D User Interfaces contains all of the accepted conference papers and the poster abstracts.",
"abstracts": [
{
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"content": "We are pleased to present the technical papers for IEEE VR 2018: the 25th IEEE Conference on Virtual Reality and 3D User Interfaces, held March 18-22, 2018 in Reutlingen, Germany. IEEE VR 2018 features two categories of submissions: (i) VR Journal Papers, and (ii) VR Conference Papers. Both categories have their own program committees, submission processes, and review processes. This year, 178 submissions were submitted to the Journal track from which 29 were accepted as articles to IEEE TVCG (16.3%). All of these will be presented at the IEEE VR 2018 conference, along with 6 additional papers in the VR area that were published in IEEE TVCG during the past year. Furthermore, 6 submission (3.4%) were recommended for a regular issue of TVCG with major revisions with reviewer continuity. Each of the papers in this special issue went through a rigorous two-round review process. All accepted journal papers are published in a special issue of IEEE Transactions on Visualization and Computer Graphics (TVCG). The Proceedings of the IEEE Conference on Virtual Reality and 3D User Interfaces contains all of the accepted conference papers and the poster abstracts.",
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"title": "Preface",
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{
"givenName": "Frank",
"surname": "Steinicke",
"fullName": "Frank Steinicke",
"affiliation": "University of Hamburg, GER",
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{
"givenName": "Bruce",
"surname": "Thomas",
"fullName": "Bruce Thomas",
"affiliation": "University of South Australia, AUS",
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{
"givenName": "Greg",
"surname": "Welch",
"fullName": "Greg Welch",
"affiliation": "University of Central Florida, USA",
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