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Displaying 1-36 out of 36 total
Keynotes
Found in: 2012 14th Symposium on Virtual and Augmented Reality (SVR)
By Aditi Majumder,Jens Grimsgaard,Albert Skip Rizzo
Issue Date:May 2012
pp. xvii-xxi
This keynotes discusses the following: imparting new degrees of freedom to next generation displays and cameras; developing visualization and virtual reality technologies in R&D for energy industry challenges; and clinical virtual reality: a brief revi...
   
A Scalable Distributed Paradigm for Multi-User Interaction with Tiled Rear Projection Display Walls
Found in: IEEE Transactions on Visualization and Computer Graphics
By Pablo Roman, Maxim Lazarov, Aditi Majumder
Issue Date:November 2010
pp. 1623-1632
We present the first distributed paradigm for multiple users to interact simultaneously with large tiled rear projection display walls. Unlike earlier works, our paradigm allows easy scalability across different applications, interaction modalities, displa...
 
Color Seamlessness in Multi-Projector Displays Using Constrained Gamut Morphing
Found in: IEEE Transactions on Visualization and Computer Graphics
By Behzad Sajadi, Maxim Lazarov, M. Gopi, Aditi Majumder
Issue Date:November 2009
pp. 1317-1326
Multi-projector displays show significant spatial variation in 3D color gamut due to variation in the chromaticity gamuts across the projectors, vignetting effect of each projector and also overlap across adjacent projectors. In this paper we present a new...
 
Markerless View-Independent Registration of Multiple Distorted Projectors on Extruded Surfaces Using an Uncalibrated Camera
Found in: IEEE Transactions on Visualization and Computer Graphics
By Behzad Sajadi, Aditi Majumder
Issue Date:November 2009
pp. 1307-1316
In this paper, we present the first algorithm to geometrically register multiple projectors in a view-independent manner (i.e. wallpapered) on a common type of curved surface, vertically extruded surface, using an uncalibrated camera without attaching any ...
 
Undistorting Foreground Objects in Wide Angle Images
Found in: 2013 IEEE International Symposium on Multimedia (ISM)
By Mahdi Abbaspour Tehrani,Aditi Majumder,M. Gopi
Issue Date:December 2013
pp. 46-52
The use of wide angle lens on commodity cameras are becoming increasingly popular. However, this leads to image distortions due to the large difference in relative orientation of the different foreground objects with respect to the camera's image plane. Mo...
 
Large Area Displays: The Changing Face of Visualization
Found in: Computer
By Aditi Majumder,Behzad Sajadi
Issue Date:May 2013
pp. 26-33
Although very large immersive displays that can accommodate current data's scale, resolution, and complexity have progressed rapidly in the past decade and are now accessible to lay consumers, installation and maintenance challenges remain. The Web extra a...
 
Guest Editors' Introduction: Special Section on the IEEE Virtual Reality Conference (VR)
Found in: IEEE Transactions on Visualization and Computer Graphics
By Victoria Interrante,Benjamin C. Lok,Aditi Majumder,Michitaka Hirose
Issue Date:July 2012
pp. 1013-1016
No summary available.
 
Autocalibration of Multiprojector CAVE-Like Immersive Environments
Found in: IEEE Transactions on Visualization and Computer Graphics
By Behzad Sajadi,Aditi Majumder
Issue Date:March 2012
pp. 381-393
In this paper, we present the first method for the geometric autocalibration of multiple projectors on a set of CAVE-like immersive display surfaces including truncated domes and 4 or 5-wall CAVEs (three side walls, floor, and/or ceiling). All such surface...
 
Message from the program chairs
Found in: Virtual Reality Conference, IEEE
By Michitaka Hirose,Benjamin Lok,Aditi Majumder,Dieter Schmalstieg
Issue Date:March 2011
pp. xi
Welcome to IEEE Virtual Reality 2011! Similar to previous years, the conference program is mostly made up of single track presentations. There are fourteen long paper presentations, eighteen short presentations, and three panels. This year, we have some ne...
   
Autocalibrating Tiled Projectors on Piecewise Smooth Vertically Extruded Surfaces
Found in: IEEE Transactions on Visualization and Computer Graphics
By Behzad Sajadi, Aditi Majumder
Issue Date:September 2011
pp. 1209-1222
In this paper, we present a novel technique to calibrate multiple casually aligned projectors on fiducial-free piecewise smooth vertically extruded surfaces using a single camera. Such surfaces include cylindrical displays and CAVEs, common in immersive vi...
 
Projector Placement Planning for High Quality Visualizations on Real-World Colored Objects
Found in: IEEE Transactions on Visualization and Computer Graphics
By Alvin J. Law, Daniel G. Aliaga, Aditi Majumder
Issue Date:November 2010
pp. 1633-1641
Many visualization applications benefit from displaying content on real-world objects rather than on a traditional display (e.g., a monitor). This type of visualization display is achieved by projecting precisely controlled illumination from multiple proje...
 
Auto-calibration of cylindrical multi-projector systems
Found in: Virtual Reality Conference, IEEE
By Behzad Sajadi,Aditi Majumder
Issue Date:March 2010
pp. 155-162
In this paper we present a novel technique to calibrate multiple casually aligned projectors on a fiducial-free cylindrical curved surface using a single camera. We impose two priors to the cylindrical display: (a) cylinder is a vertically extruded surface...
 
Geometric Modeling and Calibration of Planar Multi-Projector Displays Using Rational Bezier Patches
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Ezekiel S. Bhasker, Aditi Majumder
Issue Date:June 2007
pp. 1-8
In order to achieve seamless imagery in a planar multiprojector display, geometric distortions and misalignment of images within and across projectors have to be removed. Camera-based calibration methods are popular for achieving this in an automated fashi...
 
Photometric Self-Calibration of a Projector-Camera System
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Ray Juang, Aditi Majumder
Issue Date:June 2007
pp. 1-8
In this paper, we present a method for photometric self-calibration of a projector-camera system. In addition to the input transfer functions (commonly called gamma functions), we also reconstruct the spatial intensity fall-off from the center to fringe (c...
 
Contrast Enhancement of Multi-Displays Using Human Contrast Sensitivity
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Aditi Majumder
Issue Date:June 2005
pp. 377-382
Study of contrast sensitivity of the human eye shows that we are more sensitive to brightness differences at low intensity levels than at high intensity levels. We apply this fact effectively to achieve brightness seamlessness in multi-projector displays. ...
 
Camera-Based Calibration Techniques for Seamless Multiprojector Displays
Found in: IEEE Transactions on Visualization and Computer Graphics
By Michael Brown, Aditi Majumder, Ruigang Yang
Issue Date:March 2005
pp. 193-206
Multiprojector, large-scale displays are used in scientific visualization, virtual reality, and other visually intensive applications. In recent years, a number of camera-based computer vision techniques have been proposed to register the geometry and colo...
 
Color Nonuniformity in Projection-Based Displays: Analysis and Solutions
Found in: IEEE Transactions on Visualization and Computer Graphics
By Aditi Majumder, Rick Stevens
Issue Date:March 2004
pp. 177-188
<p><b>Abstract</b>—Large-area displays made up of several projectors show significant variation in color. In this paper, we <it>identify</it> different projector parameters that cause the color variation and <it>study<...
 
Achieving Color Uniformity Across Multi-Projector Displays
Found in: Visualization Conference, IEEE
By Aditi Majumder, Zhu He, Herman Towles, Greg Welch
Issue Date:October 2000
pp. 17
Large area tiled displays are gaining popularity for use in collaborative immersive virtual environments and scientific visualization. While recent work has addressed the issues of geometric registration, rendering architectures, and human interfaces, ther...
 
Image enhancement in projectors via optical pixel shift and overlay
Found in: 2013 IEEE International Conference on Computational Photography (ICCP)
By Behzad Sajadi,Duy Qoc-Lai,Alex H. Ihler,M. Gopi,Aditi Majumder
Issue Date:April 2013
pp. 1-10
Earlier work has explored enhancing the perceived resolution of a display by shifting multiple different low-resolution images by fractions of a pixel and overlaying them in a temporally multiplexed fashion. This increases the manufacturing cost and also s...
   
HD-GraphViz: highly distributed graph visualization on tiled displays
Found in: Proceedings of the Eighth Indian Conference on Computer Vision, Graphics and Image Processing (ICVGIP '12)
By Aditi Majumder, M. Gopi, Sangwon Chae
Issue Date:December 2012
pp. 1-8
In this paper, we propose a distributed approach for visualizing graph datasets using distributed force-directed layout algorithm on multiple displays each of which is controlled by a compute device. In this distributed network of compute-display nodes, th...
     
Edge-guided resolution enhancement in projectors via optical pixel sharing
Found in: ACM Transactions on Graphics (TOG)
By Aditi Majumder, Behzad Sajadi, M. Gopi
Issue Date:July 2012
pp. 1-122
Digital projection technology has improved significantly in recent years. But, the relationship of cost with respect to available resolution in projectors is still super-linear. In this paper, we present a method that uses projector light modulator panels ...
     
Fast high-resolution appearance editing using superimposed projections
Found in: ACM Transactions on Graphics (TOG)
By Aditi Majumder, Alvin Law, Behzad Sajadi, Daniel G. Aliaga, Yu Hong Yeung
Issue Date:April 2012
pp. 1-13
We present a system that superimposes multiple projections onto an object of arbitrary shape and color to produce high-resolution appearance changes. Our system produces appearances at an improved resolution compared to prior works and can change appearanc...
     
Collaborative video playback on a federation of tiled mobile projectors enabled by visual feedback
Found in: Proceedings of the 3rd Multimedia Systems Conference (MMSys '12)
By Aditi Majumder, Fadi Kurdahi, Magda El Zarki, Kiarash Amiri, Shih-Hsien Yang
Issue Date:February 2012
pp. 113-118
Pico projectors are expected to become increasingly popular in the near future, in particular when embedded in mobile devices such as smart phones, portable media players and digital cameras. Consumers seeking more features and attracted to all in one port...
     
Switchable primaries using shiftable layers of color filter arrays
Found in: ACM SIGGRAPH 2011 papers (SIGGRAPH '11)
By Aditi Majumder, Atsuto Maki, Behzad Sajadi, Kazuhiro Hiwada, Ramesh Raskar
Issue Date:August 2011
pp. 287-294
We present a camera with switchable primaries using shiftable layers of color filter arrays (CFAs). By layering a pair of CMY CFAs in this novel manner we can switch between multiple sets of color primaries (namely RGB, CMY and RGBCY) in the same camera. I...
     
Switchable primaries using shiftable layers of color filter arrays
Found in: ACM Transactions on Graphics (TOG)
By Aditi Majumder, Atsuto Maki, Behzad Sajadi, Kazuhiro Hiwada, Ramesh Raskar
Issue Date:July 2011
pp. 1-33
We present a camera with switchable primaries using shiftable layers of color filter arrays (CFAs). By layering a pair of CMY CFAs in this novel manner we can switch between multiple sets of color primaries (namely RGB, CMY and RGBCY) in the same camera. I...
     
Automated analysis of remyelination therapy for spinal cord injury
Found in: Proceedings of the Seventh Indian Conference on Computer Vision, Graphics and Image Processing (ICVGIP '10)
By Aditi Majumder, Hans Keirstead, Koel Das, M. Gopi, Monica Siegenthaler
Issue Date:December 2010
pp. 314-321
Demyelination- the loss of myelin sheath that insulates axons, is a prominent feature in many neurological disorders resulting in spinal cord injury (SCI). The lost myelin sheath can be replaced by remyelination, used in SCI treatment. In this paper, we pr...
     
Automatic registration of multiple projectors on swept surfaces
Found in: Proceedings of the 17th ACM Symposium on Virtual Reality Software and Technology (VRST '10)
By Aditi Majumder, Behzad Sajadi
Issue Date:November 2010
pp. 159-166
In this paper, we present the first method to geometrically register multiple projectors on a swept surface (e.g. a truncated dome) using a single uncalibrated camera without using any physical markers on the surface. Our method can even handle non-linear ...
     
Large format displays
Found in: ACM SIGGRAPH 2008 classes (SIGGRAPH '08)
By Aditi Majumder
Issue Date:August 2008
pp. 110-110
Modern digital projectors are a central part of large-format displays, non-intrusive augmented reality systems and computational illumination for 3D image-based modeling. High speed and high framerate projectors also support intriguing applications in opti...
     
Projectors for graphics
Found in: ACM SIGGRAPH 2008 classes (SIGGRAPH '08)
By Aditi Majumder, Hendrik P. A. Lensch, Oliver Bimber, Ramesh Raskar
Issue Date:August 2008
pp. 110-110
Modern digital projectors are a central part of large-format displays, non-intrusive augmented reality systems and computational illumination for 3D image-based modeling. High speed and high framerate projectors also support intriguing applications in opti...
     
Perception-based contrast enhancement of images
Found in: ACM Transactions on Applied Perception (TAP)
By Aditi Majumder, Sandy Irani
Issue Date:November 2007
pp. 17-es
Study of contrast sensitivity of the human eye shows that our suprathreshold contrast sensitivity follows the Weber Law and, hence, increases proportionally with the increase in the mean local luminance. In this paper, we effectively apply this fact to des...
     
Advances towards next-generation flexible multi-projector display walls
Found in: Proceedings of the 2007 workshop on Emerging displays technologies: images and beyond: the future of displays and interacton (EDT '07)
By Aditi Majumder, Ezekiel S. Bhasker, Ray Juang
Issue Date:August 2007
pp. 11-es
Multi-projector displays provide a large-scale and a high-resolution view at the same time. Today, projectors are commodity products, making such displays are affordable, but several challenges must be overcome in order to make this technology available to...
     
Contrast enhancement of images using human contrast sensitivity
Found in: Proceedings of the 3rd symposium on Applied perception in graphics and visualization (APGV '06)
By Aditi Majumder, Sandy Irani
Issue Date:July 2006
pp. 69-76
Study of contrast sensitivity of the human eye shows that our contrast discrimination sensitivity follows the weber law for suprathreshold levels. In this paper, we apply this fact effectively to design a contrast enhancement method for images that improve...
     
Perceptual photometric seamlessness in projection-based tiled displays
Found in: ACM Transactions on Graphics (TOG)
By Aditi Majumder, Rick Stevens
Issue Date:January 2005
pp. 118-139
Arguably, the most vexing problem remaining for multi-projector displays is that of photometric (brightness) seamlessness within and across different projectors. Researchers have strived for <i>strict photometric uniformity</i> that achieves identi...
     
LAM: luminance attenuation map for photometric uniformity in projection based displays
Found in: Proceedings of the ACM symposium on Virtual reality software and technology (VRST '02)
By Aditi Majumder, Rick Stevens
Issue Date:November 2002
pp. 147-154
Large-area multi-projector displays show significant spatial variation in color, both within a single projector's field of view and across different projectors. Recent research in this area has shown that the color variation is primarily due to luminance v...
     
Hardware accelerated real time charcoal rendering
Found in: Proceedings of the second international symposium on Non-photorealistic animation and rendering (NPAR '02)
By Aditi Majumder, M. Gopi
Issue Date:June 2002
pp. 59-66
In this paper, we present simple rendering techniques implemented using traditional graphics hardware to achieve the effects of charcoal drawing. The effects include characteristics of charcoal drawings like broad grainy strokes and smooth tonal variations...
     
Immersive teleconferencing: a new algorithm to generate seamless panoramic video imagery
Found in: Proceedings of the seventh ACM international conference on Multimedia (Part 1) (MULTIMEDIA '99)
By Aditi Majumder, Henry Fuchs, M. Gopi, W. Brent Seales
Issue Date:October 1999
pp. 169-178
This paper presents a new algorithm for immersive teleconferencing, which addresses the problem of registering and blending multiple images together to create a single seamless panorama. In the immersive teleconference paradigm, one frame of the teleconfer...
     
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