[ { "id": "Artusi-2001-NTD", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "New Time-Dependent Tone mapping Algorithm", "date": "2001-11", "abstract": "In this report we present a new\ntime-dependent tone mapping model which describes the ability of the\nhuman vision to adapt to even strong changes in the luminance of the\nsurroundings. This ability depends on time; in fact the human visual\nsystem needs a determined amount of time until reaching the final\nstage of adaptation. Our model accepts the CIEXYZ values of an image\nas input and converts them into RGB values reproducible on a monitor.\nThis work is based on the retinal model presented by Pattanaik et al.\n, but introducing substantial modifications. In fact, we define a new\ndynamic model which describes the time dependence of the human visual\nsystem, utilizing different filters; the cromatic adaptation is taken\ninto account by introducing the model of von Kries. Furthermore, we\nintroduce new techniques of gamut mapping and conversion between the\n values of retinal response and luminance of the display.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 191, 230, 192 ], "number": "TR-186-2-01-21", "pages_from": "1", "pages_to": "9", "research_areas": [], "keywords": [ "colours", "chromatic adaptation", "appearance model", "time-dependence", "visual adaptation" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Artusi-2001-NTD-paper.pdf", "type": "application/pdf", "size": 929822, "path": "Publication:Artusi-2001-NTD", "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Artusi-2001-NTD/Artusi-2001-NTD-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Artusi-2001-NTD/", "__class": "Publication" }, { "id": "Faisstnauer-2001-Con", "type_id": "misc", "tu_id": null, "repositum_id": null, "title": "Construction of an Open Geometry Server for Client Server Virtual Environments", "date": "2001", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 107, 190, 230, 249 ], "note": "Proceedings of the IEEE VR 2001 conference, pp. 105-112, Yokohama, Japan, 2001", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Faisstnauer-2001-Con/", "__class": "Publication" }, { "id": "Faisstnauer-2001-Sch", "type_id": "misc", "tu_id": null, "repositum_id": null, "title": "Scheduling for Virtual Environments and Games Using Visibilities and Priorities", "date": "2001", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 190, 202, 230 ], "note": "SCS Transactions, Vol. 18, No. 2, pp. 73-82, 2001", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Faisstnauer-2001-Sch/", "__class": "Publication" }, { "id": "Faisstnauer-thesis", "type_id": "phdthesis", "tu_id": null, "repositum_id": null, "title": "Priority Scheduling for Networked Virtual Environments", "date": "2001", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 230 ], "date_end": "2001-06", "supervisor": [ 190 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Faisstnauer-thesis/", "__class": "Publication" }, { "id": "Faisst-2000-VPRR", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Scheduling for Very Large Virtual Environments and Networked Games Using Visibility and\nPriorities", "date": "2000-04", "abstract": "The problem of network bandwidth limitations is encountered in almost any distributed virtual\nenvironment or networked game. In a typical client-server setup, where the virtual world is managed by a server\nand replicated by connected clients which visualize the scene, the server must repeatedly transmit update messages\nto the clients. By employing visibility information, the number of messages transmitted over the network can be\nreduced by sending each client only update messages for objects which are visible from the viewpoint of the\nclient. A naïve approach requires to examine visibility between pairs of objects and leads to a quadratic effort\nin the number of objects, substantially affecting the scalability of such environments. This paper presents a\ntechnique that allows the server to manage the transmission of update messages for each client with a constant\noverhead, reducing overall computational cost to a linear effort. We show how the server can employ visibility\ninformation to schedule all objects using the Priority Round-Robin algorithm. This algorithm is further enhanced\nwith activity monitoring that provides a graceful degradation of the system's performance, even if the behavior of\nobjects is unpredictable. This makes the algorithm suited to schedule update messages regarding server-controlled\nobjects as well as user-controlled avatars.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 230, 202, 190 ], "number": "TR-186-2-00-09", "pages_from": "1", "pages_to": "8", "research_areas": [], "keywords": [ "Visibility", "Scheduling", "Distributed Systems", "Networking", "Virtual Environments" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Faisst-2000-VPRR-paper.pdf", "type": "application/pdf", "size": 752288, "path": "Publication:Faisst-2000-VPRR", "url": "https://www.cg.tuwien.ac.at/research/publications/2000/Faisst-2000-VPRR/Faisst-2000-VPRR-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2000/Faisst-2000-VPRR/", "__class": "Publication" }, { "id": "Faisstnauer-2000-Pri", "type_id": "misc", "tu_id": null, "repositum_id": null, "title": "Priority Round-Robin Scheduling for Very Large Virtual Environments", "date": "2000", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 190, 202, 230 ], "note": "Proceedings of IEEE VR'2000, pp. 135-142, NEw Brunswick, NJ, 2000 (honorable mention in best paper award selection)", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2000/Faisstnauer-2000-Pri/", "__class": "Publication" }, { "id": "Faisstnauer-2000-Prio", "type_id": "misc", "tu_id": null, "repositum_id": null, "title": "Priority Scheduling for Networked Virtual Environments", "date": "2000", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 190, 202, 230 ], "note": "In IEEE Computer Graphics and Applications, VOl. 20(6), pp. 66-75, November 2000", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2000/Faisstnauer-2000-Prio/", "__class": "Publication" }, { "id": "Faisstnauer-2000-Sch", "type_id": "misc", "tu_id": null, "repositum_id": null, "title": "Scheduling for very large Virtual Environments and Networked Games using Visibility and Priorities", "date": "2000", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 190, 202, 230 ], "note": "In Proceedings of the DIS-RT 2000 conference, pp. 31-38, San Francisco, CA, 2000", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2000/Faisstnauer-2000-Sch/", "__class": "Publication" }, { "id": "Faisstnauer-1999-Pri", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Priority Round-Robin Scheduling for Very Large Virtual\nEnvironments", "date": "1999-08", "abstract": "In virtual environments containing a very large number\nof objects, the limited amount of available resources often proves to be\na bottleneck, causing a competition for those resources – for example\nnetwork bandwidth, processing power or the rendering pipeline. This\nleads to a degradation of the system’s performance, as only a small\nnumber of elements can be granted the resource required. In this paper\nwe present a generic scheduling algorithm that allows to achieve a\ngraceful degradation; it is output sensitive, minimizes the risk of\nstarvation and enforces priorities based on a freely definable error\nmetric. Hence it can be employed in virtual environments of almost any\nsize, to schedule elements which are competing for a determined\nresource, because of a bottleneck.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 230, 202, 190 ], "number": "TR-186-2-99-18", "pages_from": "1", "pages_to": "8", "research_areas": [], "keywords": [ "LOD", "graceful degradation", "very large virtual environments", "round robin", "priority", "output sensitive", "scheduling" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Faisstnauer-1999-Pri-paper.gz", "type": "application/octet-stream", "size": 327860, "path": "Publication:Faisstnauer-1999-Pri", "url": "https://www.cg.tuwien.ac.at/research/publications/1999/Faisstnauer-1999-Pri/Faisstnauer-1999-Pri-paper.gz", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/1999/Faisstnauer-1999-Pri/", "__class": "Publication" }, { "id": "Faure-1999-Col", "type_id": "misc", "tu_id": null, "repositum_id": null, "title": "Collaborative Animation over the Network.", "date": "1999", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 34, 35, 36, 37, 38, 205, 230, 403 ], "note": "IEEE Proceedings of Computer Animation 1999 (CA'99), 26-28 May, Geneva, Switzerland, 1999.", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/1999/Faure-1999-Col/", "__class": "Publication" }, { "id": "Faisstnauer-1998-Com", "type_id": "misc", "tu_id": null, "repositum_id": null, "title": "Computer Assisted Selection of 3D Interaction and Navigation Metaphors", "date": "1998", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 202, 230, 234 ], "note": "Proceedings of Workshop on Computer Graphics, pp. ?-?, Taiwan, November 4-5, 1998.", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/1998/Faisstnauer-1998-Com/", "__class": "Publication" }, { "id": "Faisstnauer-1998-Dev", "type_id": "misc", "tu_id": null, "repositum_id": null, "title": "Device-Independent Navigation and Interaction in Virtual Environments", "date": "1998", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 202, 230, 234 ], "note": "Proceedings of the 1998 VRST Adjunct Workshop on Computer Graphics, Taipei, Taiwan, Nov. 5-6, 1998.", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/1998/Faisstnauer-1998-Dev/", "__class": "Publication" }, { "id": "Faisstnauer-1997-DINIVE", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Device-Independent Navigation and Interaction in Virtual\n Environments", "date": "1997-08", "abstract": "We present a new approach to the integration of input\ndevices into virtual environment software systems. Our approach employs a\nso-called Mapper module as an intermediate between input device drivers and\nvirtual environment application. Major advantages of our approach are full\ndevice-independence, including the easy integration of new input devices\nand emulation of missing device capabilities, interactive reconfiguration,\nsharing of input devices among multiple applications, automatic selection\nof devices and interaction appropriate for the task, and high-level support\nfor a large variety of navigation styles in virtual environments.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 230, 202, 234 ], "number": "TR-186-2-97-15", "pages_from": "1", "pages_to": "8", "research_areas": [], "keywords": [ "user interface", "virtual environments", "devices" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Faisstnauer-1997-DINIVE-paper.pdf", "type": "application/pdf", "size": 993287, "path": "Publication:Faisstnauer-1997-DINIVE", "url": "https://www.cg.tuwien.ac.at/research/publications/1997/Faisstnauer-1997-DINIVE/Faisstnauer-1997-DINIVE-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/1997/Faisstnauer-1997-DINIVE/", "__class": "Publication" }, { "id": "Faisstnauer-1995-TLH", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Tracker Library: Handling VR Input Devices", "date": "1995-12", "abstract": "When building immersive virtual environments, it is\nnecessary to track the user´s head to determine its\ndirection of gaze, as well as other parts of the\nbody, for example hands to allow interaction.\nTherefore a tracking device is needed. Trackers\nusually consist of a stationary part, called\nemitter, and one or more small movable parts, called\nreceivers or sensors, which are mounted on the\npoints to track and whose position and orientation\ncan be determined by the tracking device.\nThe Tracker Library, described in this paper, is a\ndevice driver that allows to easy configure the\ntracker and retrieve the position and orientation\n\t\t data required.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 230, 238 ], "number": "TR-186-2-95-18", "pages_from": "1", "pages_to": "21", "research_areas": [], "keywords": [ "virtual environments", "tracking" ], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/1995/Faisstnauer-1995-TLH/", "__class": "Publication" }, { "id": "Schmalstieg-1995-CHI", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Constructing a Highly Immersive Virtual Environment: A\n\t\tCase Study", "date": "1995-11", "abstract": "Virtual reality (VR) applications raise enormous interest\ninside and outside computer science. Unfortunately, VR\nsystems are rather complex, involving many software and\nhardware modules being integrated. Theoretical papers are\nnot always of much aid in the actual implementation of VR\napplications. We try to fill this gap with a case study on\na simple example VR system, that is used to demonstrate\nthe most important aspects of a VR implementation, including\napplication design, implementation strategy, selection of\nhardware and software, rendering, tracking and display\ntechnology. Special attention is paid to practical issues\nthat are usually only learned by experience, and on the\ndiscussion of devices and methods that are inexpensive and\n\t\treadily available.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 202, 230, 238 ], "number": "TR-186-2-95-12", "pages_from": "1", "pages_to": "10", "research_areas": [], "keywords": [ "virtual reality", "virtual environment", "immersion", "case study" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Schmalstieg-1995-CHI-paper.gz", "type": "application/octet-stream", "size": 94115, "path": "Publication:Schmalstieg-1995-CHI", "url": "https://www.cg.tuwien.ac.at/research/publications/1995/Schmalstieg-1995-CHI/Schmalstieg-1995-CHI-paper.gz", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/1995/Schmalstieg-1995-CHI/", "__class": "Publication" } ]