[ { "id": "szabo-2023-fig", "type_id": "journalpaper_notalk", "tu_id": null, "repositum_id": "20.500.12708/192053", "title": "Feature-assisted interactive geometry reconstruction in 3D point clouds using incremental region growing", "date": "2023-04", "abstract": "Reconstructing geometric shapes from point clouds is a common task that is often accomplished by experts manually modeling geometries in CAD-capable software. State-of-the-art workflows based on fully automatic geometry extraction are limited by point cloud density and memory constraints, and require pre- and post-processing by the user. In this work, we present a framework for interactive, user-driven, feature-assisted geometry reconstruction from arbitrarily sized point clouds. Based on seeded region-growing point cloud segmentation, the user interactively extracts planar pieces of geometry and utilizes contextual suggestions to point out plane surfaces, normal and tangential directions, and edges and corners. We implement a set of feature-assisted tools for high-precision modeling tasks in architecture and urban surveying scenarios, enabling instant-feedback interactive point cloud manipulation on large-scale data collected from real-world building interiors and facades. We evaluate our results through systematic measurement of the reconstruction accuracy, and interviews with domain experts who deploy our framework in a commercial setting and give both structured and subjective feedback.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 1002, 1640, 1387, 1494, 228, 1277, 166 ], "doi": "10.1016/j.cag.2023.02.004", "issn": "1873-7684", "journal": "COMPUTERS & GRAPHICS-UK", "pages": "12", "pages_from": "213", "pages_to": "224", "publisher": "PERGAMON-ELSEVIER SCIENCE LTD", "volume": "111", "research_areas": [], "keywords": [ "Point clouds", "interaction", "Segmentation", "Reconstruction" ], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2023/szabo-2023-fig/", "__class": "Publication" }, { "id": "STEINLECHNER-2019-APS", "type_id": "inproceedings", "tu_id": 283267, "repositum_id": null, "title": "Adaptive Point-cloud Segmentation for Assisted Interactions", "date": "2019-05", "abstract": "In this work, we propose an interaction-driven approach streamlined to\nsupport and improve a wide range of real-time 2D interaction metaphors\nfor arbitrarily large pointclouds based on detected primitive shapes.\nRather than performing shape detection as a costly pre-processing step\non the entire point cloud at once, a user-controlled interaction\ndetermines the region that is to be segmented next. By keeping the size\nof the region and the number of points small, the algorithm produces\nmeaningful results and therefore feedback on the local geometry within a\nfraction of a second. We can apply these finding for improved picking\nand selection metaphors in large point clouds, and propose further novel\nshape-assisted interactions that utilize this local semantic information\nto improve the user’s workflow.", "authors_et_al": false, "substitute": null, "main_image": { "description": "Our novel interactive approach for shape detection in point clouds allows for sophisticated interactions, like shape-assisted lasso selection, shape-assisted volumetric brush, and shape-assisted local LoD increment.", "filetitle": "teaser", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1573, "image_height": 588, "name": "STEINLECHNER-2019-APS-teaser.PNG", "type": "image/png", "size": 1889379, "path": "Publication:STEINLECHNER-2019-APS", "url": "https://www.cg.tuwien.ac.at/research/publications/2019/STEINLECHNER-2019-APS/STEINLECHNER-2019-APS-teaser.PNG", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2019/STEINLECHNER-2019-APS/STEINLECHNER-2019-APS-teaser:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 1387, 1539, 678, 1640, 1002, 228, 193 ], "booktitle": "Proceedings of the 33rd Symposium on Interactive 3D Graphics and Games", "cfp": { "name": "I3D 2019 _ Symposium on Interactive 3D Graphics and Games.pdf", "type": "application/pdf", "error": "0", "size": "31008", "orig_name": "I3D 2019 _ Symposium on Interactive 3D Graphics and Games.pdf", "ext": "pdf" }, "date_from": "2019-05-21", "date_to": "2019-05-23", "doi": "10.1145/3306131.3317023", "editor": "Blenkhorn, Ari Rapkin", "event": "33rd Symposium on Interactive 3D Graphics and Games", "isbn": "978-1-4503-6310-5", "lecturer": [ 1387 ], "location": "Montreal, Quebec, Canada", "pages_from": "14:1", "pages_to": "14:9", "publisher": "ACM", "series": "I3D ’19", "research_areas": [ "Rendering" ], "keywords": [ "Pointcloud Segmentation", "Shape Detection", "Interactive Editing" ], "weblinks": [], "files": [ { "description": null, "filetitle": "draft", "main_file": true, "use_in_gallery": false, "access": "public", "name": "STEINLECHNER-2019-APS-draft.pdf", "type": "application/pdf", "size": 19929621, "path": "Publication:STEINLECHNER-2019-APS", "url": "https://www.cg.tuwien.ac.at/research/publications/2019/STEINLECHNER-2019-APS/STEINLECHNER-2019-APS-draft.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2019/STEINLECHNER-2019-APS/STEINLECHNER-2019-APS-draft:thumb{{size}}.png" }, { "description": "Our novel interactive approach for shape detection in point clouds allows for sophisticated interactions, like shape-assisted lasso selection, shape-assisted volumetric brush, and shape-assisted local LoD increment.", "filetitle": "teaser", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1573, "image_height": 588, "name": "STEINLECHNER-2019-APS-teaser.PNG", "type": "image/png", "size": 1889379, "path": "Publication:STEINLECHNER-2019-APS", "url": "https://www.cg.tuwien.ac.at/research/publications/2019/STEINLECHNER-2019-APS/STEINLECHNER-2019-APS-teaser.PNG", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2019/STEINLECHNER-2019-APS/STEINLECHNER-2019-APS-teaser:thumb{{size}}.png" } ], "projects_workgroups": [ "rend", "VRVis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2019/STEINLECHNER-2019-APS/", "__class": "Publication" }, { "id": "STEINLECHNER-2019-ICT", "type_id": "inproceedings", "tu_id": 283451, "repositum_id": null, "title": "A Novel Approach for Immediate, Interactive CT Data Visualization andEvaluation using GPU-based Segmentation and Visual Analysis", "date": "2019-02", "abstract": "CT data of industrially produced cast metal parts are often afflicted\nwith artefacts due to complex geometries ill-suited for the scanning\nprocess. Simple global threshold-based porosity detection algorithms\nusually fail to deliver meaningful results. Other adaptive methods can\nhandle image artefacts, but require long preprocessing times. This makes\nan efficient analysis workflow infeasible. We propose an alternative\napproach for analyzing and visualizing volume defects in a fully\ninteractive manner, where analyzing volumes becomes more of an\ninteractive exploration instead of time-consuming parameter guessing\ninterrupted by long processing times. Our system is based on a highly\nefficient GPU implementation of a segmentation algorithm for porosity\ndetection. The runtime is on the order of seconds for a full volume and\nparametrization is kept simple due to a single threshold parameter. A\nfully interactive user interface comprised of multiple linked views\nallows to quickly identify defects of interest, while filtering out\nartefacts even in noisy areas.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "teaser", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1680, "image_height": 1011, "name": "STEINLECHNER-2019-ICT-teaser.png", "type": "image/png", "size": 791896, "path": "Publication:STEINLECHNER-2019-ICT", "url": "https://www.cg.tuwien.ac.at/research/publications/2019/STEINLECHNER-2019-ICT/STEINLECHNER-2019-ICT-teaser.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2019/STEINLECHNER-2019-ICT/STEINLECHNER-2019-ICT-teaser:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 1387, 1640, 1641, 1642, 228, 678, 166 ], "booktitle": "International Conference on Industrial Computed Tomography (ICT) 2019", "cfp": { "name": "ICT 2019 call for papers.pdf", "type": "application/pdf", "error": "0", "size": "219852", "orig_name": "ICT 2019 call for papers.pdf", "ext": "pdf" }, "date_from": "2019-02-13", "date_to": "2019-02-15", "editor": "Simone Carmignato", "event": "International Conference on Industrial Computed Tomography (ICT) 2019", "lecturer": [ 1387 ], "location": "Padova, Italy", "pages_from": "1", "pages_to": "6", "research_areas": [ "InfoVis", "Rendering" ], "keywords": [ "CT", "GPU", "Inclusion Detection", "Interactive Visualisation", "VisualAnalysis", "Parallel Coordinates", "Volume Rendering" ], "weblinks": [], "files": [ { "description": null, "filetitle": "draft", "main_file": true, "use_in_gallery": false, "access": "public", "name": "STEINLECHNER-2019-ICT-draft.pdf", "type": "application/pdf", "size": 9584761, "path": "Publication:STEINLECHNER-2019-ICT", "url": "https://www.cg.tuwien.ac.at/research/publications/2019/STEINLECHNER-2019-ICT/STEINLECHNER-2019-ICT-draft.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2019/STEINLECHNER-2019-ICT/STEINLECHNER-2019-ICT-draft:thumb{{size}}.png" }, { "description": null, "filetitle": "teaser", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1680, "image_height": 1011, "name": "STEINLECHNER-2019-ICT-teaser.png", "type": "image/png", "size": 791896, "path": "Publication:STEINLECHNER-2019-ICT", "url": "https://www.cg.tuwien.ac.at/research/publications/2019/STEINLECHNER-2019-ICT/STEINLECHNER-2019-ICT-teaser.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2019/STEINLECHNER-2019-ICT/STEINLECHNER-2019-ICT-teaser:thumb{{size}}.png" } ], "projects_workgroups": [ "vis", "VRVis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2019/STEINLECHNER-2019-ICT/", "__class": "Publication" }, { "id": "Reichinger-2018-TAC", "type_id": "journalpaper_notalk", "tu_id": null, "repositum_id": null, "title": "Pictures in Your Mind: Using Interactive Gesture-Controlled Reliefs to Explore Art", "date": "2018-03", "abstract": "Tactile reliefs offer many benefits over the more classic\n raised line drawings or tactile diagrams, as depth, 3D shape,\n and surface textures are directly perceivable. Although often\n created for blind and visually impaired (BVI) people, a wider\n range of people may benefit from such multimodal material.\n However, some reliefs are still difficult to understand without\n proper guidance or accompanying verbal descriptions, hindering\n autonomous exploration.\n \n In this work, we present a gesture-controlled interactive audio\n guide (IAG) based on recent low-cost depth cameras that can be\n operated directly with the hands on relief surfaces during\n tactile exploration. The interactively explorable,\n location-dependent verbal and captioned descriptions promise\n rapid tactile accessibility to 2.5D spatial information in a\n home or education setting, to online resources, or as a kiosk\n installation at public places.\n \n We present a working prototype, discuss design decisions, and\n present the results of two evaluation studies: the first with 13\n BVI test users and the second follow-up study with 14 test users\n across a wide range of people with differences and difficulties\n associated with perception, memory, cognition, and\n communication. The participant-led research method of this\n latter study prompted new, significant and innovative\n developments.\n", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 879, 1573, 1574, 1575, 1576, 1577, 1578, 204, 228, 190 ], "journal": "ACM Transactions on Accessible Computing", "number": "2", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [ "VRVis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2018/Reichinger-2018-TAC/", "__class": "Publication" }, { "id": "SCHWAERZLER-2017-SBGM", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Sketch-based Guided Modeling of 3D Buildings from Oriented Photos", "date": "2017-02", "abstract": "Capturing urban scenes using photogrammetric methods has become an interesting alternative to laser scanning in the past years. For the reconstruction of CAD-ready 3D models, two main types of interactive approaches have become prevalent: One uses the generated 3D point clouds to reconstruct polygonal surfaces, while the other focuses on 2D interaction in the photos to define edges and faces.\n\nWe propose a novel interactive system that combines and enhances these approaches in order to optimize current reconstruction and modeling workflows. Our main interaction target are the photos, allowing simple 2D interactions and edge-based snapping. We use the underlying segmented point cloud to define the 3D context in which the sketched polygons are projected whenever possible. An intuitive visual guiding interface gives the user feedback on the accuracy to expect with the current state of modeling to keep the necessary interactions at a minimum level.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "teaser", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 800, "image_height": 497, "name": "SCHWAERZLER-2017-SBGM-teaser.png", "type": "image/png", "size": 337632, "path": "Publication:SCHWAERZLER-2017-SBGM", "url": "https://www.cg.tuwien.ac.at/research/publications/2017/SCHWAERZLER-2017-SBGM/SCHWAERZLER-2017-SBGM-teaser.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2017/SCHWAERZLER-2017-SBGM/SCHWAERZLER-2017-SBGM-teaser:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 678, 1466, 228, 193 ], "booktitle": "Proceedings of the 21st ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games", "date_from": "2017-02-25", "date_to": "2017-02-27", "event": "I3D 2017", "isbn": "978-1-4503-4886-7", "lecturer": [ 1466 ], "location": "San Francisco, CA", "pages_from": "9:1", "pages_to": "9:8", "publisher": "ACM", "research_areas": [ "Modeling" ], "keywords": [ "3D modeling", "guidance", "photogrammetry" ], "weblinks": [], "files": [ { "description": null, "filetitle": "draft", "main_file": true, "use_in_gallery": false, "access": "public", "name": "SCHWAERZLER-2017-SBGM-draft.pdf", "type": "application/pdf", "size": 36126759, "path": "Publication:SCHWAERZLER-2017-SBGM", "url": "https://www.cg.tuwien.ac.at/research/publications/2017/SCHWAERZLER-2017-SBGM/SCHWAERZLER-2017-SBGM-draft.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2017/SCHWAERZLER-2017-SBGM/SCHWAERZLER-2017-SBGM-draft:thumb{{size}}.png" }, { "description": null, "filetitle": "teaser", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 800, "image_height": 497, "name": "SCHWAERZLER-2017-SBGM-teaser.png", "type": "image/png", "size": 337632, "path": "Publication:SCHWAERZLER-2017-SBGM", "url": "https://www.cg.tuwien.ac.at/research/publications/2017/SCHWAERZLER-2017-SBGM/SCHWAERZLER-2017-SBGM-teaser.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2017/SCHWAERZLER-2017-SBGM/SCHWAERZLER-2017-SBGM-teaser:thumb{{size}}.png" } ], "projects_workgroups": [ "VRVis", "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2017/SCHWAERZLER-2017-SBGM/", "__class": "Publication" }, { "id": "Reichinger_2016", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "Gesture-Based Interactive Audio Guide on Tactile Reliefs", "date": "2016-10", "abstract": "For blind and visually impaired people, tactile reliefs offer many benefits over the more classic raised line drawings or tactile diagrams, as depth, 3D shape and surface textures are directly perceivable. However, without proper guidance some reliefs are still difficult to explore autonomously.\nIn this work, we present a gesture-controlled interactive audio guide (IAG) based on recent low-cost depth cameras that operates directly on relief surfaces. The interactively explorable, location-dependent verbal descriptions promise rapid tactile accessibility to 2.5D spatial information in a home or education setting, to on-line resources, or as a kiosk installation at \npublic places.\nWe present a working prototype, discuss design decisions and present the results of two evaluation sessions with a total of \n20 visually impaired test users.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": true, "use_in_gallery": true, "access": "public", "image_width": 404, "image_height": 262, "name": "Reichinger_2016-image.jpg", "type": "image/jpeg", "size": 19342, "path": "Publication:Reichinger_2016", "url": "https://www.cg.tuwien.ac.at/research/publications/2016/Reichinger_2016/Reichinger_2016-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2016/Reichinger_2016/Reichinger_2016-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 879, 228, 204, 190 ], "date_from": "2016-10-23", "date_to": "2016-10-26", "event": "18th International ACM SIGACCESS Conference on Computers and Accessibility", "journal": "Proceedings of the 18th International ACM SIGACCESS Conference on Computers & Accessibility", "lecturer": [ 879 ], "location": "Reno, Nevada, USA", "research_areas": [ "IllVis" ], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": true, "use_in_gallery": true, "access": "public", "image_width": 404, "image_height": 262, "name": "Reichinger_2016-image.jpg", "type": "image/jpeg", "size": 19342, "path": "Publication:Reichinger_2016", "url": "https://www.cg.tuwien.ac.at/research/publications/2016/Reichinger_2016/Reichinger_2016-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2016/Reichinger_2016/Reichinger_2016-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Reichinger_2016-Paper.pdf", "type": "application/pdf", "size": 5469565, "path": "Publication:Reichinger_2016", "url": "https://www.cg.tuwien.ac.at/research/publications/2016/Reichinger_2016/Reichinger_2016-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2016/Reichinger_2016/Reichinger_2016-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "VRVis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2016/Reichinger_2016/", "__class": "Publication" }, { "id": "Reichinger_Fuhrmann_2016", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "A Concept for Re-Useable Interactive Tactile Reliefs", "date": "2016", "abstract": "We introduce a concept for a relief-printer, a novel production method for tactile reliefs, that allows to reproduce bas-reliefs of several centimeters height difference. In contrast to available methods, this printer will have a much smaller preparation time, and does not consume material nor produce waste, since it is based on a re-usable medium, suitable for temporary printouts. Second, we sketch a concept for the autonomous, interactive exploration of tactile reliefs, in the form of a gesture-controlled audio guide, based on recent depth cameras. Especially the combination of both approaches promises rapid tactile accessibility to 2.5D spatial information in a home or education setting, to on-line resources, or as a kiosk installation in museums.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": true, "use_in_gallery": true, "access": "public", "image_width": 335, "image_height": 156, "name": "Reichinger_Fuhrmann_2016-image.jpg", "type": "image/jpeg", "size": 10288, "path": "Publication:Reichinger_Fuhrmann_2016", "url": "https://www.cg.tuwien.ac.at/research/publications/2016/Reichinger_Fuhrmann_2016/Reichinger_Fuhrmann_2016-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2016/Reichinger_Fuhrmann_2016/Reichinger_Fuhrmann_2016-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 879, 204, 228, 190 ], "booktitle": "A Concept for Re-Useable Interactive Tactile Reliefs", "journal": "ICCHP 2016, Part II", "lecturer": [ 1392 ], "research_areas": [ "IllVis" ], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": true, "use_in_gallery": true, "access": "public", "image_width": 335, "image_height": 156, "name": "Reichinger_Fuhrmann_2016-image.jpg", "type": "image/jpeg", "size": 10288, "path": "Publication:Reichinger_Fuhrmann_2016", "url": "https://www.cg.tuwien.ac.at/research/publications/2016/Reichinger_Fuhrmann_2016/Reichinger_Fuhrmann_2016-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2016/Reichinger_Fuhrmann_2016/Reichinger_Fuhrmann_2016-image:thumb{{size}}.png" }, { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Reichinger_Fuhrmann_2016-paper.pdf", "type": "application/pdf", "size": 428189, "path": "Publication:Reichinger_Fuhrmann_2016", "url": "https://www.cg.tuwien.ac.at/research/publications/2016/Reichinger_Fuhrmann_2016/Reichinger_Fuhrmann_2016-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2016/Reichinger_Fuhrmann_2016/Reichinger_Fuhrmann_2016-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "VRVis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2016/Reichinger_Fuhrmann_2016/", "__class": "Publication" }, { "id": "Reisner_2013_RSB", "type_id": "journalpaper_notalk", "tu_id": null, "repositum_id": null, "title": "Reconstruction of Shape Boundaries with Multimodal Constrains", "date": "2013-05", "abstract": "Shape primitives are a valuable input for reconstructing 3D models from point clouds. In this paper we present a method for clipping simple shape primitives at reasonable boundaries. The shape primitives, e.g. planes or cylinders, are 2D manifolds which are automatically detected in unstructured point clouds. Shape boundaries are necessary for generating valid 3D models from multiple shape primitives, because shape primitives possibly have dimensions of infinite extent or they are only partially present in the scene. Hints for reasonable boundaries of shape primitives are indicated by different input sources and constraints. Point clouds and range images provide information where shape primitives coincide with measured surface points. Edge detectors offer cues for surface boundaries in color images. The set of shape primitives is analyzed for constraints such as intersections. Due to an iterative approach, intermediate results provide additional constraints such as coplanar boundary points over multiple shape primitives. We present a framework for extracting and optimizing shape boundaries based on the given input data and multiple constraints. Further, we provide a simple user interface for manually adding constraints in order to improve the results. Our approach generates structurally simple 3D models from shape primitives and point clouds. It is useful for reconstructing scenes containing man-made objects, such as buildings, interior scenes, or engineering objects. The application of multiple constraints enables the reconstruction of proper 3D models despite noisy or incomplete point clouds. ", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "Image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 162, "image_height": 200, "name": "Reisner_2013_RSB-Image.jpg", "type": "image/jpeg", "size": 24561, "path": "Publication:Reisner_2013_RSB", "url": "https://www.cg.tuwien.ac.at/research/publications/2013/Reisner_2013_RSB/Reisner_2013_RSB-Image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2013/Reisner_2013_RSB/Reisner_2013_RSB-Image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 847, 228, 190 ], "journal": "Computer & Graphics", "number": "3", "pages_from": "137", "pages_to": "147", "volume": "37", "research_areas": [ "Geometry" ], "keywords": [ "Shape boundaries", "Shape primitives; ", "Reconstruction;" ], "weblinks": [ { "href": "http://www.sciencedirect.com/science/article/pii/S0097849313000022", "caption": null, "description": null, "main_file": 0 } ], "files": [ { "description": null, "filetitle": "Image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 162, "image_height": 200, "name": "Reisner_2013_RSB-Image.jpg", "type": "image/jpeg", "size": 24561, "path": "Publication:Reisner_2013_RSB", "url": "https://www.cg.tuwien.ac.at/research/publications/2013/Reisner_2013_RSB/Reisner_2013_RSB-Image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2013/Reisner_2013_RSB/Reisner_2013_RSB-Image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Reisner_2013_RSB-Paper.pdf", "type": "application/pdf", "size": 1844060, "path": "Publication:Reisner_2013_RSB", "url": "https://www.cg.tuwien.ac.at/research/publications/2013/Reisner_2013_RSB/Reisner_2013_RSB-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2013/Reisner_2013_RSB/Reisner_2013_RSB-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2013/Reisner_2013_RSB/", "__class": "Publication" }, { "id": "arikan-2013-osn", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "O-Snap: Optimization-Based Snapping for Modeling Architecture", "date": "2013-01", "abstract": "In this paper, we introduce a novel reconstruction and modeling pipeline to create polygonal models from unstructured point clouds. We propose an\nautomatic polygonal reconstruction that can then be interactively refined by the user. An initial model is automatically created by extracting a set of RANSAC-based locally fitted planar primitives along with their boundary polygons, and then searching for local adjacency relations among parts of the polygons. The extracted set of adjacency relations is enforced to snap polygon elements together, while simultaneously fitting to the input point cloud and ensuring the planarity of the polygons. This optimization-based snapping algorithm may also be interleaved with user interaction. This allows the user to sketch modifications with coarse and loose 2D strokes, as the exact alignment of the polygons is automatically performed by the snapping.\nThe generated models are coarse, offer simple editing possibilities by design and are suitable for interactive 3D applications like games, virtual\nenvironments etc. The main innovation in our approach lies in the tight\ncoupling between interactive input and automatic optimization, as well as in an algorithm that robustly discovers the set of adjacency relations.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 2322, "image_height": 1381, "name": "arikan-2013-osn-image.png", "type": "image/png", "size": 2664881, "path": "Publication:arikan-2013-osn", "url": "https://www.cg.tuwien.ac.at/research/publications/2013/arikan-2013-osn/arikan-2013-osn-image.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2013/arikan-2013-osn/arikan-2013-osn-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 865, 678, 1033, 193, 228 ], "date_from": "2013-07-21", "date_to": "2013-07-25", "doi": "10.1145/2421636.2421642", "event": "ACM SIGGRAPH 2013", "issn": "0730-0301", "journal": "ACM Transactions on Graphics", "lecturer": [ 865 ], "location": "Anaheim, CA, USA", "number": "1", "pages_from": "6:1", "pages_to": "6:15", "volume": "32", "research_areas": [ "Geometry", "Modeling" ], "keywords": [ "interactive modeling", "surface reconstruction", "geometric optimization" ], "weblinks": [ { "href": "http://dl.acm.org/citation.cfm?id=2421636.2421642&coll=DL&dl=ACM&CFID=399181985&CFTOKEN=14714358", "caption": null, "description": null, "main_file": 0 } ], "files": [ { "description": "[109 MB]", "filetitle": "applications video", "main_file": false, "use_in_gallery": false, 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Images with Primitive Shapes", "date": "2012-04", "abstract": "We introduce a novel method for automatically segmenting multiple registered range images by detecting and optimizing geometric primitives. The resulting shapes provide high level information about scanned objects and are a valuable input for surface reconstruction, hole filling, or shape analysis. We begin by generating a global graph of sample points covering all input frames. The graph structure allows to compute a globally consistent segmentation with a memory and time-efficient solution, even for large sets of input images. We iteratively detect shapes with a Ransac-approach, optimize the assignments of graph nodes to shapes, and optimize the shape parameters. Finally, pixel-accurate segmentations can be extracted for each source image individually. By using range images instead of unstructured point clouds as input, we can exploit additional information such as connectivity or varying precision of depth measurements.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 850, "image_height": 640, "name": "reisner-2012-iwssip-image.png", "type": "image/png", "size": 911961, "path": "Publication:reisner-2012-iwssip", "url": "https://www.cg.tuwien.ac.at/research/publications/2012/reisner-2012-iwssip/reisner-2012-iwssip-image.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2012/reisner-2012-iwssip/reisner-2012-iwssip-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 847, 228 ], "booktitle": "Proceedings of 19th International Conference on Systems, Signals and Image Processing (IWSSIP 2012)", "date_from": "2012-04-11", "date_to": "2012-04-13", "isbn": "978-3-200-02588-2", "lecturer": [ 847 ], "location": "Vienna", "research_areas": [], "keywords": [ "surface fitting", "range data", "segmentation", "shape detection" ], "weblinks": [], "files": [ { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 850, "image_height": 640, "name": "reisner-2012-iwssip-image.png", "type": "image/png", "size": 911961, "path": "Publication:reisner-2012-iwssip", "url": "https://www.cg.tuwien.ac.at/research/publications/2012/reisner-2012-iwssip/reisner-2012-iwssip-image.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2012/reisner-2012-iwssip/reisner-2012-iwssip-image:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": false, "use_in_gallery": false, "access": "public", "name": "reisner-2012-iwssip-paper.pdf", "type": "application/pdf", "size": 2294181, "path": "Publication:reisner-2012-iwssip", "url": "https://www.cg.tuwien.ac.at/research/publications/2012/reisner-2012-iwssip/reisner-2012-iwssip-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2012/reisner-2012-iwssip/reisner-2012-iwssip-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "VRVis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2012/reisner-2012-iwssip/", "__class": "Publication" }, { "id": "Reichinger-12", "type_id": "inbook", "tu_id": null, "repositum_id": null, "title": " Computer-Aided Design of Tactile Models – Taxonomy and Case-Studies", "date": "2012", "abstract": "Computer-aided tools offer great potential for the design and production of tactile models. While many publications focus on the design of essentially two-dimensional media like raised line drawings or the reproduction of three-dimensional objects, we intend to broaden this view by introducing a taxonomy that classifies the full range of conversion possibilities based on dimensionality. We present an overview of current methods, discuss specific advantages and difficulties, identify suitable programs and algorithms and discuss personal experiences from case studies performed in cooperation with two museums.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 879, 1063, 1051, 228, 190 ], "booktitle": "Computers Helping People with Special Needs", "chapter": "13th International Conference, ICCHP 2012, Linz, Austria, July 11-13, 2012, Proceedings, Part II", "editor": "K. Miesenberger, A. Karshmer, P. Penaz, W. Zagler", "isbn": "978-3-642-31533-6", "pages_from": "497", "pages_to": "504", "publisher": "Springer Berlin-Heidelberg", "series": "Lecture Notes in Computer Science", "volume": "7383", "research_areas": [ "Modeling" ], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Reichinger-12-Paper.pdf", "type": "application/pdf", "size": 1489030, "path": "Publication:Reichinger-12", "url": "https://www.cg.tuwien.ac.at/research/publications/2012/Reichinger-12/Reichinger-12-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2012/Reichinger-12/Reichinger-12-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2012/Reichinger-12/", "__class": "Publication" }, { "id": "reisner-2011-comdm", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Consolidation of Multiple Depth Maps", "date": "2011-11", "abstract": "Consolidation of point clouds, including denoising, outlier removal and normal estimation, is an important pre-processing step for surface reconstruction techniques. We\r\npresent a consolidation framework specialized on point clouds created by multiple frames of a depth camera. An\r\nadaptive view-dependent locally optimal projection operator denoises multiple depth maps while keeping their struc\r\nture in two-dimensional grids. Depth cameras produce a systematic variation of noise scales along the depth axis.\r\nAdapting to different noise scales allows to remove noise in the point cloud and preserve well-defined details at the same time. Our framework provides additional consolidation steps for depth maps like normal estimation and outlier removal. We show how knowledge about the distribution of\r\nnoise in the input data can be effectively used for improving\r\npoint clouds.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image-desk", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1710, "image_height": 1406, "name": "reisner-2011-comdm-image-desk.png", "type": "image/png", "size": 2527631, "path": "Publication:reisner-2011-comdm", "url": "https://www.cg.tuwien.ac.at/research/publications/2011/reisner-2011-comdm/reisner-2011-comdm-image-desk.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2011/reisner-2011-comdm/reisner-2011-comdm-image-desk:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 847, 228 ], "booktitle": "IEEE Workshop on Consumer Depth Cameras for Computer Vision (CDC4CV 2011)", "lecturer": [ 847 ], "location": "Barcelona", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "image-desk", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1710, "image_height": 1406, "name": "reisner-2011-comdm-image-desk.png", "type": "image/png", "size": 2527631, "path": "Publication:reisner-2011-comdm", "url": "https://www.cg.tuwien.ac.at/research/publications/2011/reisner-2011-comdm/reisner-2011-comdm-image-desk.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2011/reisner-2011-comdm/reisner-2011-comdm-image-desk:thumb{{size}}.png" }, { "description": "", "filetitle": "image-markers", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 2416, "image_height": 1785, "name": "reisner-2011-comdm-image-markers.png", "type": "image/png", "size": 2681070, "path": "Publication:reisner-2011-comdm", "url": "https://www.cg.tuwien.ac.at/research/publications/2011/reisner-2011-comdm/reisner-2011-comdm-image-markers.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2011/reisner-2011-comdm/reisner-2011-comdm-image-markers:thumb{{size}}.png" }, { "description": "", "filetitle": "poster", "main_file": false, "use_in_gallery": false, "access": "public", "name": "reisner-2011-comdm-poster.pdf", "type": "application/pdf", "size": 3374994, "path": "Publication:reisner-2011-comdm", "url": "https://www.cg.tuwien.ac.at/research/publications/2011/reisner-2011-comdm/reisner-2011-comdm-poster.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2011/reisner-2011-comdm/reisner-2011-comdm-poster:thumb{{size}}.png" }, { "description": "", "filetitle": "preprint", "main_file": false, "use_in_gallery": false, "access": "public", "name": "reisner-2011-comdm-preprint.pdf", "type": "application/pdf", "size": 4910482, "path": "Publication:reisner-2011-comdm", "url": "https://www.cg.tuwien.ac.at/research/publications/2011/reisner-2011-comdm/reisner-2011-comdm-preprint.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2011/reisner-2011-comdm/reisner-2011-comdm-preprint:thumb{{size}}.png" } ], "projects_workgroups": [ "VRVis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2011/reisner-2011-comdm/", "__class": "Publication" }, { "id": "Reichinger-2011-Tac", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "High-Quality Tactile Paintings", "date": "2011", "abstract": "The aim of this work is to bring the cultural heritage of two-dimensional art closer to being accessible by blind\r\nand visually impaired people. We present a computer-assisted workflow for the creation of tactile representations\r\nof paintings, suitable to be used as a learning tool in the context of guided tours in museums or galleries. Starting\r\nfrom high-resolution images of original paintings, our process allows an artist to quickly design the desired form,\r\nand generate data suitable for rapid prototyping machines to produce the physical touch tools. Laser-cut layered\r\ndepth diagrams, convey not only the individual objects in the painting and their spatial layout, but also augment\r\ntheir depth relations. CNC-milled textured reliefs additionally render fine details like brush strokes and texture\r\nsuitable for the sense of touch. Our methods mimic aspects of the visual sense, make sure that the haptic output is\r\nquite faithful to the original paintings and do not require special manual abilities, like sculpting skills.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Reichinger-2011-Tac-.pdf", "type": "application/pdf", "size": 2330074, "path": "Publication:Reichinger-2011-Tac", "url": "https://www.cg.tuwien.ac.at/research/publications/2011/Reichinger-2011-Tac/Reichinger-2011-Tac-.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2011/Reichinger-2011-Tac/Reichinger-2011-Tac-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 879, 228, 190 ], "booktitle": "Eurographics 2011 - Areas Papers", "date_from": "2011-04-11", "date_to": "2011-04-15", "editor": "A. Day and R. Mantiuk and E. Reinhard and R. Scopigno", "lecturer": [ 879 ], "location": "Llandudno, UK", "organization": "Eurographics", "pages_from": "1", "pages_to": "8", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Reichinger-2011-Tac-.pdf", "type": "application/pdf", "size": 2330074, "path": "Publication:Reichinger-2011-Tac", "url": "https://www.cg.tuwien.ac.at/research/publications/2011/Reichinger-2011-Tac/Reichinger-2011-Tac-.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2011/Reichinger-2011-Tac/Reichinger-2011-Tac-:thumb{{size}}.png" } ], "projects_workgroups": [ "VRVis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2011/Reichinger-2011-Tac/", "__class": "Publication" }, { "id": "musialski-2010-imv", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Interactive Multi-View Façade Image Editing", "date": "2010-11", "abstract": "We propose a system for generating high-quality approximated façade ortho-textures based on a set of perspective source photographs taken by a consumer hand-held camera. Our approach is to sample a combined orthographic approximation over the façade-plane from the input photos. In order to avoid kinks and seams which may occur on transitions between different source images, we introduce color adjustment and gradient domain stitching by solving a Poisson equation in real-time. In order to add maximum control on the one hand and easy interaction on the other, we provide several editing interactions allowing for user-guided post-processing.", "authors_et_al": false, "substitute": null, "main_image": { "description": "image", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 353, "image_height": 167, "name": "musialski-2010-imv-image.jpg", "type": "image/jpeg", "size": 30433, "path": "Publication:musialski-2010-imv", "url": "https://www.cg.tuwien.ac.at/research/publications/2010/musialski-2010-imv/musialski-2010-imv-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2010/musialski-2010-imv/musialski-2010-imv-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 844, 659, 678, 878, 228, 190 ], "booktitle": "Vision, Modeling and Visualization Workshop 2010", "date_from": "2010-11-15", "date_to": "2010-11-17", "lecturer": [ 659 ], "location": "Siegen, Germany", "research_areas": [], "keywords": [ "urban reconstruction", "facade image processing" ], "weblinks": [], "files": [ { "description": "the final draft of the paper", "filetitle": "draft", "main_file": true, "use_in_gallery": false, "access": "public", "name": "musialski-2010-imv-draft.pdf", "type": "application/pdf", "size": 12118929, "path": "Publication:musialski-2010-imv", "url": "https://www.cg.tuwien.ac.at/research/publications/2010/musialski-2010-imv/musialski-2010-imv-draft.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2010/musialski-2010-imv/musialski-2010-imv-draft:thumb{{size}}.png" }, { "description": "image", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 353, "image_height": 167, "name": "musialski-2010-imv-image.jpg", "type": "image/jpeg", "size": 30433, "path": "Publication:musialski-2010-imv", "url": "https://www.cg.tuwien.ac.at/research/publications/2010/musialski-2010-imv/musialski-2010-imv-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2010/musialski-2010-imv/musialski-2010-imv-image:thumb{{size}}.png" } ], "projects_workgroups": [ "VRVis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2010/musialski-2010-imv/", "__class": "Publication" }, { "id": "musialski-2010-tof", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Tiling of Ortho-Rectified Façade Images", "date": "2010-05", "abstract": "Typical building facades consist of regular structures such as windows arranged in a predominantly grid-like manner. We propose a method that handles precisely such facades and assumes that there must be horizontal and vertical repetitions of similar patterns. Using a Monte Carlo sampling approach, this method is able to segment repetitive patterns on orthogonal images along the axes even\nif the pattern is partially occluded. Additionally, it is very fast and\ncan be used as a preprocessing step for finer segmentation stages.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 755, "image_height": 593, "name": "musialski-2010-tof-image.jpg", "type": "image/jpeg", "size": 86158, "path": "Publication:musialski-2010-tof", "url": "https://www.cg.tuwien.ac.at/research/publications/2010/musialski-2010-tof/musialski-2010-tof-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2010/musialski-2010-tof/musialski-2010-tof-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 844, 846, 228, 194, 190 ], "booktitle": "Proceedings of 26th Spring Conference on Computer Graphics (SCCG 2010)", "date_from": "2010-05-13", "date_to": "2010-05-15", "editor": "Helwig Hauser , Reinhard Klein", "isbn": "978-80-223-2644-5", "lecturer": [ 844 ], "location": "Budmerice, Slovak Republic", "publisher": "Comenius University, Bratislava", "research_areas": [ "Modeling" ], "keywords": [ "image processing", "facade segmentation", "urban reconstruction" ], "weblinks": [], "files": [ { "description": null, "filetitle": "draft", "main_file": true, "use_in_gallery": false, "access": "public", "name": "musialski-2010-tof-draft.pdf", "type": "application/pdf", "size": 3173051, "path": "Publication:musialski-2010-tof", "url": "https://www.cg.tuwien.ac.at/research/publications/2010/musialski-2010-tof/musialski-2010-tof-draft.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2010/musialski-2010-tof/musialski-2010-tof-draft:thumb{{size}}.png" }, { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 755, "image_height": 593, "name": "musialski-2010-tof-image.jpg", "type": "image/jpeg", "size": 86158, "path": "Publication:musialski-2010-tof", "url": "https://www.cg.tuwien.ac.at/research/publications/2010/musialski-2010-tof/musialski-2010-tof-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2010/musialski-2010-tof/musialski-2010-tof-image:thumb{{size}}.png" } ], "projects_workgroups": [ "VRVis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2010/musialski-2010-tof/", "__class": "Publication" }, { "id": "musialski-2009-sbfr", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Symmetry-Based Facade Repair", "date": "2009-11", "abstract": "In this paper we address the problem of removing unwanted image content in a single orthographic facade image. We exploit the regular structure present in building facades and introduce propagation process that is guided by the symmetry prevalent in the image. It removes larger unwanted image objects such as traffic lights, street signs, or cables as well as smaller noise, such as reflections in the windows. The output is intended as source for textures in urban reconstruction projects.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": true, "use_in_gallery": false, "access": "public", "image_width": 221, "image_height": 89, "name": "musialski-2009-sbfr-image.jpg", "type": "image/jpeg", "size": 20422, "path": "Publication:musialski-2009-sbfr", "url": "https://www.cg.tuwien.ac.at/research/publications/2009/musialski-2009-sbfr/musialski-2009-sbfr-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2009/musialski-2009-sbfr/musialski-2009-sbfr-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 844, 194, 846, 228, 190 ], "booktitle": "Vision, Modeling, and Visualization Workshop 2009", "date_from": "2009-11-16", "date_to": "2009-11-18", "editor": "Marcus Magnor, Bodo Rosenhahn, Holger Theisel ", "isbn": "978-3980487481", "lecturer": [ 844 ], "location": "Braunschweig", "research_areas": [ "Modeling" ], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": true, "use_in_gallery": false, "access": "public", "image_width": 221, "image_height": 89, "name": "musialski-2009-sbfr-image.jpg", "type": "image/jpeg", "size": 20422, "path": "Publication:musialski-2009-sbfr", "url": "https://www.cg.tuwien.ac.at/research/publications/2009/musialski-2009-sbfr/musialski-2009-sbfr-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2009/musialski-2009-sbfr/musialski-2009-sbfr-image:thumb{{size}}.png" }, { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "musialski-2009-sbfr-paper.pdf", "type": "application/pdf", "size": 6476585, "path": "Publication:musialski-2009-sbfr", "url": "https://www.cg.tuwien.ac.at/research/publications/2009/musialski-2009-sbfr/musialski-2009-sbfr-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2009/musialski-2009-sbfr/musialski-2009-sbfr-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "VRVis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2009/musialski-2009-sbfr/", "__class": "Publication" }, { "id": "WONKA-2006-GVS", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "Guided Visibility Sampling", "date": "2006-07", "abstract": "This paper addresses the problem of computing the triangles visible\nfrom a region in space. The proposed aggressive visibility solution\nis based on stochastic ray shooting and can take any triangular\nmodel as input. We do not rely on connectivity information,\nvolumetric occluders, or the availability of large occluders, and\ncan therefore process any given input scene. The proposed algorithm\nis practically memoryless, thereby alleviating the large memory\nconsumption problems prevalent in several previous algorithms. The\nstrategy of our algorithm is to use ray mutations in ray space to\ncast rays that are likely to sample new triangles. Our algorithm\nimproves the sampling efficiency of previous work by over two orders\nof magnitude.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 661, "image_height": 467, "name": "WONKA-2006-GVS-.png", "type": "image/png", "size": 93562, "path": "Publication:WONKA-2006-GVS", "url": "https://www.cg.tuwien.ac.at/research/publications/2006/WONKA-2006-GVS/WONKA-2006-GVS-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2006/WONKA-2006-GVS/WONKA-2006-GVS-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 194, 193, 609, 228, 205, 610 ], "date_from": "2006-07-30", "date_to": "2006-08-04", "doi": "10.1145/1141911.1141914", "event": "ACM SIGGRAPH 2006", "issn": "0730-0301", "journal": "ACM Transactions on Graphics", "lecturer": [ 194, 193 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