Eurographics Italy 2010 preprints available
Our group presented three research contributions at EGIt 2010. Topics are volume upsampling, use of multiresolution models in simulation, and GPGPU acceleration of memory intensive techniques, Preprints are available on our publications pages.
PG 2010 preprint available: High Quality Interactive Rendering of Massive Point Models using Multi-way kd-Trees
We present a simple and efficient technique for out-of-core multi-resolution construction and high quality visualization of large point datasets. The method introduces a novel hierarchical LOD data organization based on multi-way kd-trees that simplifies memory management and allows controlling the LOD tree's height. The technique is incorporated in a full end-to-end system, which is evaluated on complex models made of hundreds of millions of points. Details are available on our publications pages.
CGI 2010 preprint available: View-dependent Exploration of Massive Volumetric Models on Large Scale Light Field Displays.
We report on a light-field display based virtual environment enabling multiple naked-eye users to perceive detailed multi-gigavoxel volumetric models as floating in space, responsive to their actions, and delivering different information in different areas of the workspace. Our contributions include a set of specialized interactive illustrative techniques able to provide different contextual information in different areas of the display, as well as an out-of-core CUDA based raycasting engine with a number of improvements over current GPU volume raycasters. The possibilities of the system are demonstrated by the multi-user interactive exploration of 64GVoxels datasets on a 35MPixel light field display driven by a cluster of PCs. Details are available on our publications pages.
CGI 2010 preprint available: Shape Enhancement for Rapid Prototyping
We introduce a method for improving shape of models produced using 3D printers. Details are available on our publications pages.
VG 2010 preprint available: Split-Voxel: A Simple Discontinuity-Preserving Voxel Representation for Volume Rendering
We introduce a method for improving scalar volume rendering in cases in which volumes represent physical objects with well defined boundaries separating different materials. Details are available on our publications pages.
Eurographics Italy Invited Talk: Advanced Graphics Technologies for Real-Time Massive Models Rendering
This year's conference scientific program consisted of high quality talks from distinguished lecturers. On 23 Oct. 2009, we presented an overview talk on real-time massive model rendering. Details are presented here.
IEEE VisWeek 2009 Tutorial: Interactive Massive Model Rendering
On 12 Oct. 2009, we teamed with other well-known researchers in the field of massive model rendering to present a full-day tutorial at the VisWeek Conference in Atlantic City. Details on our course are presented here.
VAST 2009 preprints available
This year we present two contributions on Interactive Remote Exploration of Massive Cityscapes and A point-based system for local and remote exploration of dense 3D scanned models.. The preprints are now available from our publications pages.
Open source RATMAN framework announced at GFOSS2009
During the "Xth Meeting of the Italian GRASS and GFOSS users", we announced that our RATMAN framework is now open source. Source code is available from ratman.sourceforge.net.
RATMAN framework for terrain streaming and rendering released as open source
RATMAN is a real-time terrain rendering framework able to asynchronously access terrain information from remote servers. It contains a simplified version of our BDAM technology, and has been used for years in the Regional Internet Geobrowser sardegna3d. The code is now available as open source from ratman.sourceforge.net.
SPACELAND Library released as open source
SL (Spaceland Library) is a suite of C++ template classes that support geometric computation specifically adapted to OpenGL). SL is mostly intended for computer graphics developers and it includes many different kind of algorithms (linear algebra methods, coding/decoding tecniques, generalized data structures, utilities). We use it internally for all of our research code. The code is now avalable from sourceforge from spacelib.sourceforge.net
Ruggero Pintus officially joined the lab
Ruggero has already worked with us during the last year in the context of the Sardegna DISTRICT. Starting from today, he will work as a researcher at CRS4.
SIGGRAPH Asia 2008 Tutorial: Interactive Massive Model Rendering
On 10 Dec. 2008, we teamed with other well-known researchers in the field of massive model rendering to present a full-day tutorial at the first SIGGRAPH Asia in Singapore. Details on our course are presented here.
Yanlin Luo joins our lab
She will work as an Experienced Researcher within the framework of the 3D Anatomical Human project.
EG VAST 2008 preprint available: Color Enhancement Techniques for Rapid Prototyping
CRS4 and ISTI-CNR developed techniques to exploit the color capabilities of recent rapid pototyping hardware devices to enhance the visual appearance of reproduced objects. In particular, by carefully pre-computing surface shading, we are able to counterbalance the sub-surface scattering (SSS) effects that hinder the perception of fine surface details. As a practical result, we are able to reproduce small scale copies of cultural heritage artifacts with an increased readability of the tiniest features and particulars, without requiring manual post-reproduction interventions or hand painting. The preprint of the paper that will be presented at Eurographics VAST 2008 is available from our publications pages.
SIGGRAPH 2008 Tutorial: Massive model visualization techniques
We teamed with other well known experts in the area to give a tutorial on massive model rendering techniques. The tutorial notes are available online.
New monograph published: Real Time Massive Model Rendering
The book is authored by Sung-eui Yoon (KAIST), Enrico Gobbetti (CRS4), Dave Kasik (Boeing), and Dinesh Manocha (UNC) and provides a synthetic overview of the field of real-time massive model rendering. See the publisher's site at Morgan and Claypool for more details.
SPM 2008 Minisymposium: Technical strategies for massive models visualization.
Together with Dave Kasik (Boeing) and Sung-eui Yoon (KAIST), we gave a lecture on current state-of-the-art in massive model rendering at the SPM symposium held in Stony Brook. The related summary paper is available from our publications pages.
First European Summer School on 3D Anatomical Human
CRS4 will host on May 21-23, 2008 the First European Summer School of the EU Project 3D Anatomical Human (3DAH). See here for details.
Renato Pajarola joins our lab for a sabbatical stay
Renato is the director of the Visualization and Multimedia Lab at the University of Zurich. He will spend his sabbatical with us, working mainly on geometry processing and parallel graphics.
CGI 2008 preprint available: A single-pass GPU ray casting framework for interactive out-of-core rendering of massive volumetric datasets
We developed and demonstrated a technique for GPU accelerated rendering of very large volumetric datasets. A preprint of the paper that will be presented at CGI 2008 is available from our publications pages. The paper will also be published in a special conference issue of The Visual Computer.
Tutorial article preprint available: Technical strategies for massive model visualization
The widening gap between slow data access and fast data processing leads to an increasing importance of data management techniques for massive model rendering. This article, that will accompany an invited Symposium session at SPM 2008, provides a survey of current technology, with special emphasis on visibility and detail culling, cache-coherent layouts, and data compression. Joint work with Dave Kasik (Boeing) and Sung-eui Yoon (KAIST). A preprint of the paper is available from our publications pages.
EG 2008 preprint available: Volume rendering on light field displays
We developed and demonstrated a technique for GPU accelerated rendering of scalar volumes on horizontal parallax only light field displays. A preprint of the paper that will be presented at Eurographics 2008 is available from our publications pages.
35Mbeams light field display installed at CRS4
A large scale (35Mbeams) light field display produced by the Holografika company is now installed in our labs. The display is an evolution of the system demonstrated in Boston at SIGGRAPH 2006. CRS4 is developing specialized techniques for large scale massive model rendering.
EG 2007 preprint available: Raycasted Blockmaps
CRS4 and ISTI-CNR developed a novel technique for streaming and rendering massive city models. A preprint of the paper that will be presented at Eurographics 2007 is available from our publications pages.
SIGGRAPH 2007 Tutorial: Real-time interactive massive model visualization
We teamed with other well known experts in the area to give a tutorial on massive model rendering techniques. The tutorial notes are available online.
Survey preprint available: Semi-regular multiresolution models for terrain rendering
A survey on adaptive terrain rendering techniques that exploit data regularity will appear in The Visual Computer. A preprint of the survey is available from our publications pages. Joint work with Renato Pajarola, U. Zurich.
Tutorial article preprint available: Massive model rendering
The article provides an overview of techniques developed for massive model rendering. Joint work with Andreas Dietrich (U. Saarland) and Sung-eui Yoon (KAIST). A preprint of the paper that will appear in a special issue of IEEE Computer Graphics and Applications is available from our publications pages.
Italia 3d: new geoviewing prototype
The region of Sardina presented at Forum PA another geoviewing system based on CRS4 technology. The system is capable of streaming and rendering full-planet views and is able to integrate layers based on specialized structures with more standard data sources, including WMS, WFS, and TMS services.
José Antonio Iglesias Guitián Joins our Lab
José will work as a Marie Curie Early Stage Researcher in the 3DAnatomicalHuman project
Computers and Graphics preprint available: Multiresolution visualization of massive models on light field displays
We developed a scalable system able to render massive models on a light field display based on projection technology. A preprint of the article that will appear in a special issue of Computers and Graphics is available from our publications pages. The article is an exended version of our EGPGV 2007 contribution
EG PGV 2007 preprint available: Multiresolution visualization on light field displays
CRS4 developed a parallel system able to render massive models on a light field display based on projection technology. A preprint of the paper that will be presented at Eurographics Symposium on Parallel Graphics and Visualization 2007 is available from our publications pages. The paper has been selected among the best 5 symposim contribution and we have invited to submit an extended version for journal publication.
Sardegna 3D: over 100K users!
The internet geoviewing application developed on the basis of our technology has now been downloaded by more than 100'000 users. Due to the increased network traffic, the servers dedicated to the applications have been upgraded.
Sardegna 3D online
The region of sardinia made available a viewer and data distribution service based on CRS4 streaming and rendering technology. The viewer, named "Sardegna 3D", provides users with the ability of flying over a high resolution 3D representation of the island of Sardinia and is integrated with the regional databases for information presentation and access. The system is available at the url: www.sardegna3d.it. The system is officially presented at COM-PA.
VRIPHYS 2006 preprint available: Real-time simulation of phaco-emulsification for cataract surgery training
We developed and demonstrated a technique for real-time interaction with semi-rigid materials that can be fractured. The method is integrated in a cataract surgery simulation system. A preprint of the paper that will be presented at VRIPHYS 2006 is available from our publications pages.
EG 2006 Tutorial: Real-time interactive massive model visualization
We teamed with other well known experts in the area to give a tutorial on massive model rendering techniques. The tutorial notes are available online.
Live from SIGGRAPH 2006: An Interactive Multi-User Holographic Environment
At the SIGGRAPH 2006 Emerging Technologies Exhibition, we have demonstrated an interactive multi-user holographic environment that allows freely moving naked eye participants to share a large 3D scene with fully continuous, observer independent, parallax. Interactive manipulation of highly tessellated objects is made possible by a distributed multiresolution renderer based on our TetraPuzzles techniques. A video illustrating our demo with sequences recorded live during the exhibition is available from our multimedia pages as video 137.
EG 2006 preprint available: C-BDAM - Compressed Batched Dynamic Adaptive Meshes for Terrain Rendering
CRS4 and ISTI-CNR developed compressed multiresolution representation for supporting interactive rendering of very large planar and spherical terrain surfaces. The technique, called Compressed Batched Dynamic Adaptive Meshes (C-BDAM), is an extension of our BDAM and P-BDAM chunked level-of-detail hierarchy. A preprint of the paper that will be presented at Eurographics 2006 is available from our publications pages.
SIGGRAPH 2006 Emerging Technology Demonstration: An Interactive Multi-user Holographic Environment
Our work, carried out in the framework of the COHERENT project has been selected as a "Emerging Technology" to be demonstrated at SIGGRAPH 2006. Our installation is a demonstration of the capabilities of a unique large scale holographic system designed for multi-user interactive applications. Our custom 50Mpixel display (1600x900mm screen) is capable of recreating the illusion of seeing virtual objects floating at fixed physical locations. Users can manipulate displayed objects through a 3D deviceless interface. Timing constraints when manipulating large scale detailed objects are met by employing advanced multiresolution techniques. A short preprint is available from our publications pages.
IEEE VR 2006 Emerging Displays Workshop: A Scalable Holographic Display for Interactive Graphics Applications
We are developing, in collaboration with Holografika, an interactive multi-user holographic display that allow freely moving naked eye participants to share a three dimensional scene with fully continuous, observer independent, parallax. A short paper devoted to a 50M display driven by a dedicated graphics cluster has been presented at the IEEE VR 2006 Workshop on Emerging Display Technologies. The preprint is available from our publications pages.
CRS4 ophtalmic simulator used for surgical training
CRS4 cataract surgery simulation technology is integrated in the DEVEYES system commercialized by DIES group. The system is employed for practical training in ophtalmology training courses focusing on the treatment of glaucoma and cataract. The first course will be held at S. Raffaele hospital in Milan (24-25 May 2006).
IEEE Visualization 2005 Preprint Available: Batched Multi Triangulation
We have redesigned the MT framework in a GPU friendly fashion, moving its granularity from triangles to precomputed optimized triangle patches. A paper describing the framework will be presented at IEEE Visualization 2005. A preprint is now available from our publications pages. A video demonstrating our implementation is available as video 131 from our multimedia pages.
SIGGRAPH 2005 Videos Available: Far Voxels - A Multiresolution Framework for Interactive Rendering of Huge Complex 3D Models on Commodity Graphics Platforms
We developed an efficient technique for inspecting extremely detailed colored objects composed of many loosely connected interweaving detailed parts of complex topological structure. Videos demonstrating the interactive inspection of multi-billion triangles scenes are available as video127, video128, and video129 from our multimedia pages.
Cataract Surgery Simulation: Demonstration video available
We are developing a training system for cataract surgery. A video illustrating the simulation of the corneal incision and capsulorhexis phases is available as video 130 from our multimedia pages.
SIGGRAPH 2005 Preprint Available: Far Voxels - A Multiresolution Framework for Interactive Rendering of Huge Complex 3D Models on Commodity Graphics Platforms
We developed an efficient technique for inspecting extremely detailed colored objects composed of many loosely connected interweaving detailed parts of complex topological structure. A paper on the subject will be presented at SIGGRAPH 2005. The preprint is now available from our publications pages. The efficiency of the approach is demonstrated with the rendering of a multi-billion triangles scene containing the full Boeing 777 CAD model, the LLNL Richtmyer Meshkov simulation isosurface, and the St. Matthew 0.25 mm scanning dataset.
IEEE VR 2005 Emerging Displays Workshop: A Scalable Holographic Display for Interactive Graphics Applications
We are developing, in collaboration with Holografika and CS SI, a scalable system for interactive rendering on a holographic display. An OpenGL compliant renderer runs on a PC cluster and drives a display device capable of presenting 3D views with horizontal parallax to an unlimited number of freely moving naked eye viewers. A short paper on the technique will be presented at the IEEE VR 2005 Workshop on Emerging Display Technologies. The preprint is available from our publications pages. A video demonstrating the system is available as video 126 from our multimedia pages.
VRIPHYS 2004 Preprint: Hardware Accelerated Dynamic Volume Rendering
We developed a simple direct volume rendering technique, that supports low latency continuous visual feedback in parallel with physical simulation on commodity graphics platforms. A paper on the technique will be presented at VRIPHYS 2004. The preprint is available from our publications pages.
C&G 2004 Preprint: Layered Point Clouds Extended Version
We developed a simple and efficient technique for managing, distributing and rendering models with hundreds of millions of point samples on commodity graphics platforms connected through standard broadband networks. An extended version of the original SPBG paper will appear in the forthcoming special issue of Computers & Graphics. The preprint is available from our publications pages.
SPBG 2004 Preprint and Video Available: Layered Point Clouds
We developed a simple and efficient technique for managing, distributing and rendering models with hundreds of millions of point samples on commodity graphics platforms connected through standard broadband networks. Videos illustrating the technique are available from our multimedia pages. A related paper will be presented at the First Eurographics Symposium on Point Based Graphics and is available from our publications pages.
SIGGRAPH 2004 Preprint Available: Adaptive TetraPuzzles: Efficient Out-of-Core Construction and Visualization of Gigantic Polygonal Models
CRS4 and ISTI-CNR developed an efficient technique for managing and rendering models with hundreds of millions of polygons on commodity graphics platform. Videos illustrating the technique are available from our multimedia pages. A related paper will be presented at SIGGRAPH 2004 and is available from our publications pages.
Ph.D. Dissertation Available: Haptic and Visual Simulation of Bone Dissection
This work, prepared in partial fulfilment of the requirements of the Ph.D. Degree in the Dept. of Mechanical Engineering, University of Cagliari, is now reachable from our publications page.
Large scale models visualization: demonstration video available
CRS4, in collaboration with ISTI/CNR, has recently proposed a new breed of solutions for interactive and accurate visualization of very large surface models on consumer graphics platforms. A video demonstrating the technique is available as video 118 from our multimedia pages.
IEEE Haptics 2004 Best Student Paper Award
Our contribution on Physics-based burr haptic simulation: tuning and evaluation won the prize for the best student paper presented at IEEE Haptics 2004, conference held in Chicago, IL, USA, March 27-28, 2004. The paper was presented by Marco Agus and is part of his Ph.D. work, done under supervision of Enrico Gobbetti (CRS4), Gianluigi Zanetti (CRS4), and Bruno Picasso (UNICA).
IEEE Haptics 2004 preprint available:Physics-based burr haptic simulation: tuning and evaluation
We discuss work on tuning a temporal bone surgical simulator using parameter values derived from experimental measurements, and on comparing between these results and the previously used domain expert assigned values. The paper is available from our publications pages and will be presented at IEEE Haptics 2004.
EG 2003 Günter Enderle Award (2nd Prize)
Our contribution on BDAM - Batched Dynamic Adaptive Meshes for High Performance Terrain Visualization won the prize for the second best paper presented at Eurographics 2003, conference held in Granada, Spain, September 1-5, 2003. The video illustrating the technique is available from our multimedia pages, and a preprint is available from our publications pages. The research is joint work CRS4/ISTI-CNR.
Volume rendering demonstration videos available
We developed an efficient technique for the interactive shaded direct volume rendering of rectilinear scalar data on commodity graphics platforms. Videos demonstrating the technique are available as video 109 and video 112 from our multimedia pages.
IEEE Visualization 2003 preprint available: Planet-Sized Batched Dynamic Adaptive Meshes (P-BDAM)
CRS4 and ISTI-CNR developed an efficient technique for out-of-core rendering and management of large textured terrain surfaces at planetary scale. Videos illustrating the technique are available from our multimedia pages. The related paper will be presented at Visualization 2003 and is available from our publications pages.
CRS4 moved to the POLARIS Science and Technology Park site
Our new location is in Pula, about 40Km West of Cagliari. Update your records with the new contact information (note that phone/fax numbers also changed).
EG 2003 preprint available: Hierarchical Higher Order Face Cluster Radiosity for Global Illumination Walkthroughs of Complex Non-Diffuse Environments
We developed an efficient technique for simulating and displaying global illumination in scenes composed of highly tessellated objects with diffuse or moderately glossy reflectance. The video illustraing the technique is available as video 107 from our multimedia pages. The related paper will be presented at Eurographics 2003 and is available from our publications pages.
EG 2003 preprint available: BDAM - Batched Dynamic Adaptive Meshes for High Performance Terrain Visualization
CRS4 and ISTI-CNR developed an efficient technique for out-of-core rendering and management of large textured terrain surfaces. The video illustraing the technique is available as video 106 from our multimedia pages. The related paper will be presented at Eurographics 2003 and is available from our publications pages.
IS4TM preprint available: Tracking the movement of surgical tools in a virtual temporal bone dissection simulator
Our short contribution describing the current state of our research on simulation of temporal bone surgical procedures is available from our publications pages. The paper will be presented at IS4TM 2003.
vic site back online
Our pages are now online, after having disapperared for the last 4 days because of an exceptional maintenance of the main server. Note that the server IP address changed.
MMVR 2003 and IEEE VR 2003 preprints available: Advances in bone dissection simulation
Our MMVR 2003 and IEEE VR 2003 contributions on bone dissection simulation are now available from our publications page.See our multimedia pages for related demonstration videos.
CRS4 videos online
A selection of our videos is now available in Divx;-) format from our multimedia pages.
Server failure and recovery
Our main file server survived from a major hardware failure, that occurred on November 22, 2002. During the recovery period, our web server has been serving files located on our backup file system. If you downloaded files between November 22 and 26, 2002, please download again!
New web site
CRS4 Visualization and Virtual Reality (VVR) group has been renamed to CRS4 Visual Computing (ViC) group. Our web pages have been completely rearranged, using cascading style sheets instead of frames, and moved to /vic/. The old web site (/vvr/) will be removed in a few weeks.
(C) 1993-2006 CRS4 Visual Computing Group
CRS4 Visual Computing Group - POLARIS Edificio 1, C.P. 25 - 09010 Pula (CA), ITALY
+39 070 9250 1
+39 070 9250 216
crs4.it
www.crs4.it/vic/