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Displaying 1-44 out of 44 total
Piecewise Image Registration in the Presence of Multiple Large Motions
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Pravin Bhat, Ke Colin Zheng, Noah Snavely, Aseem Agarwala, Maneesh Agrawala, Michael F. Cohen, Brian Curless
Issue Date:June 2006
pp. 2491-2497
We present a technique for computing a dense pixel correspondence between two images of a scene containing multiple large, rigid motions. We model each motion with either a homography (for planar objects) or a fundamental matrix. The various motions in the...
 
An Iterative Optimization Approach for Unified Image Segmentation and Matting
Found in: Computer Vision, IEEE International Conference on
By Jue Wang, Michael F. Cohen
Issue Date:October 2005
pp. 936-943
Separating a foreground object from the background in a static image involves determining both full and partial pixel coverages, also known as extracting a matte. Previous approaches require the input image to be pre-segmented into three regions: foregroun...
 
Optimized Color Sampling for Robust Matting
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Jue Wang, Michael F. Cohen
Issue Date:June 2007
pp. 1-8
Image matting is the problem of determining for each pixel in an image whether it is foreground, background, or the mixing parameter,
 
The Moment Camera
Found in: Computer
By Michael F. Cohen, Richard Szeliski
Issue Date:August 2006
pp. 40-45
Future cameras will let us
 
Layered Depth Panoramas
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Ke Colin Zheng, Sing Bing Kang, Michael F. Cohen, Richard Szeliski
Issue Date:June 2007
pp. 1-8
Representations for interactive photorealistic visualization of scenes range from compact 2D panoramas to data-intensive 4D light fields. In this paper, we propose a technique for creating a layered representation from a sparse set of images taken with a h...
 
Simultaneous Matting and Compositing
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Jue Wang, Michael F. Cohen
Issue Date:June 2007
pp. 1-8
Recent work in matting, hole filling, and compositing allows image elements to be mixed in a new composite image. Previous algorithms for matting foreground elements have assumed that the new background for compositing is unknown. We show that, if the new ...
 
Very Low Frame-Rate Video Streaming For Face-to-Face Teleconference
Found in: Data Compression Conference
By Jue Wang, Michael F. Cohen
Issue Date:March 2005
pp. 309-318
Providing the best possible face-to-face video over low bandwidth networks is a major challenge for current teleconferencing systems especially when implementing multi-party conversations. With the limitations of fixed webcams and low bandwidth, the transm...
 
Imagination Amplification
Found in: IEEE Computer Graphics and Applications
By Michael F. Cohen
Issue Date:January 2000
pp. 54-55
No summary available.
 
Radiosity and Relaxation Methods
Found in: IEEE Computer Graphics and Applications
By Steven Gortler, Michael F. Cohen, Philipp Slusallek
Issue Date:November 1994
pp. 48-58
<p>To date, there has been some confusion in the computer graphics community about how the progressive radiosity (PR) method relates to standard numerical methods for solving linear systems of equations. We show that PR is actually equivalent to the ...
 
Shape by example
Found in: Proceedings of the 2001 symposium on Interactive 3D graphics (SI3D '01)
By Charles F. Rose, Michael F. Cohen, Peter-Pike J. Sloan
Issue Date:March 2001
pp. 135-143
we present an exact and interactive collision detection system, I-COLLIDE, for large-scale environments. Such environments are characterized by the number of objects undergoing rigid motion and the complexity of the models. The algorithm does not assume th...
     
Video enhanced gigapixel panoramas
Found in: SIGGRAPH Asia 2012 Technical Briefs (SA '12)
By Johannes Kopf, Matt Uyttendaele, Michael F. Cohen, Oliver Deussen, Sören Pirk
Issue Date:November 2012
pp. 1-4
We present a method for embedding video clips within gigapixel scale imagery. The combination of high-resolution imagery and video enables users to pan and zoom across the gigapixel panorama to explore complex scenes with motion. The sparsity of the video ...
     
ShadowDraw: real-time user guidance for freehand drawing
Found in: ACM SIGGRAPH 2011 papers (SIGGRAPH '11)
By C. Lawrence Zitnick, Michael F. Cohen, Yong Jae Lee
Issue Date:August 2011
pp. 287-294
We present ShadowDraw, a system for guiding the freeform drawing of objects. As the user draws, ShadowDraw dynamically updates a shadow image underlying the user's strokes. The shadows are suggestive of object contours that guide the user as they continue ...
     
ShadowDraw: real-time user guidance for freehand drawing
Found in: ACM Transactions on Graphics (TOG)
By C. Lawrence Zitnick, Michael F. Cohen, Yong Jae Lee
Issue Date:July 2011
pp. 1-33
We present ShadowDraw, a system for guiding the freeform drawing of objects. As the user draws, ShadowDraw dynamically updates a shadow image underlying the user's strokes. The shadows are suggestive of object contours that guide the user as they continue ...
     
Integrated videos and maps for driving directions
Found in: Proceedings of the 22nd annual ACM symposium on User interface software and technology (UIST '09)
By Billy Chen, Boris Neubert, Eyal Ofek, Michael F. Cohen, Oliver Deussen
Issue Date:October 2009
pp. 223-232
While onboard navigation systems are gaining in importance, maps are still the medium of choice for laying out a route to a destination and for way finding. However, even with a map, one is almost always more comfortable navigating a route the second time ...
     
Annotating gigapixel images
Found in: Proceedings of the 21st annual ACM symposium on User interface software and technology (UIST '08)
By Johannes Kopf, Michael F. Cohen, Qing Luan, Steven M. Drucker, Ying-Qing Xu
Issue Date:October 2008
pp. 1-2
Panning and zooming interfaces for exploring very large images containing billions of pixels (gigapixel images) have recently appeared on the internet. This paper addresses issues that arise when creating and rendering auditory and textual annotations for ...
     
SIGGRAPH 2007 papers preview
Found in: ACM SIGGRAPH 2007 computer animation festival (SIGGRAPH '07)
By Jim Blinn, Michael F. Cohen
Issue Date:August 2007
pp. 120
Particle systems are visualized by rendering some fixed number of particles per frame, where particle information is sampled from emitters represented by a location, and a range of potential initial particle parameters, such as origin, size, etc. For some ...
     
Joint bilateral upsampling
Found in: ACM Transactions on Graphics (TOG)
By Dani Lischinski, Johannes Kopf, Matt Uyttendaele, Michael F. Cohen
Issue Date:July 2007
pp. 1-35
Image analysis and enhancement tasks such as tone mapping, colorization, stereo depth, and photomontage, often require computing a solution (e.g., for exposure, chromaticity, disparity, labels) over the pixel grid. Computational and memory costs often requ...
     
Capturing and viewing gigapixel images
Found in: ACM Transactions on Graphics (TOG)
By Johannes Kopf, Matt Uyttendaele, Michael F. Cohen, Oliver Deussen
Issue Date:July 2007
pp. 1-35
We present a system to capture and view "Gigapixel images": very high resolution, high dynamic range, and wide angle imagery consisting of several billion pixels each. A specialized camera mount, in combination with an automated pipeline for alignment, exp...
     
Soft scissors: an interactive tool for realtime high quality matting
Found in: ACM Transactions on Graphics (TOG)
By Jue Wang, Maneesh Agrawala, Michael F. Cohen
Issue Date:July 2007
pp. 1-35
We present Soft Scissors, an interactive tool for extracting alpha mattes of foreground objects in realtime. We recently proposed a novel offline matting algorithm capable of extracting high-quality mattes for complex foreground objects such as furry anima...
     
Summarizing personal web browsing sessions
Found in: Proceedings of the 19th annual ACM symposium on User interface software and technology (UIST '06)
By David Salesin, Geraldine Wade, Michael F. Cohen, Mira Dontcheva, Steven M. Drucker
Issue Date:October 2006
pp. 115-124
We describe a system, implemented as a browser extension, that enables users to quickly and easily collect, view, and share personal Web content. Our system employs a novel interaction model, which allows a user to specify webpage extraction patterns by in...
     
Simultaneous matting and compositing
Found in: ACM SIGGRAPH 2006 Sketches (SIGGRAPH '06)
By Jue Wang, Michael F. Cohen
Issue Date:July 2006
pp. 136-es
A technique for resurrecting the making of panoramic maps is proposed. The art of making these maps disappeared due to the difficulty to depict current cluttered urban areas, and the enormous artistic effort required for drawing an area in panoramic view. ...
     
The cartoon animation filter: Copyright restrictions prevent ACM from providing the full text for this work.
Found in: ACM SIGGRAPH 2006 Papers (SIGGRAPH '06)
By Jue Wang, Maneesh Agrawala, Michael F. Cohen, Steven M. Drucker
Issue Date:July 2006
pp. 79-es
We present the "Cartoon Animation Filter", a simple filter that takes an arbitrary input motion signal and modulates it in such a way that the output motion is more "alive" or "animated". The filter adds a smoothed, inverted, and (sometimes) time shifted v...
     
Simultaneous matting and compositing
Found in: Material presented at the ACM SIGGRAPH 2006 conference (SIGGRAPH '06)
By Jue Wang, Michael F. Cohen
Issue Date:July 2006
pp. 136-es
A technique for resurrecting the making of panoramic maps is proposed. The art of making these maps disappeared due to the difficulty to depict current cluttered urban areas, and the enormous artistic effort required for drawing an area in panoramic view. ...
     
The cartoon animation filter: Copyright restrictions prevent ACM from providing the full text for this work.
Found in: Material presented at the ACM SIGGRAPH 2006 conference (SIGGRAPH '06)
By Jue Wang, Maneesh Agrawala, Michael F. Cohen, Steven M. Drucker
Issue Date:July 2006
pp. 79-es
We present the "Cartoon Animation Filter", a simple filter that takes an arbitrary input motion signal and modulates it in such a way that the output motion is more "alive" or "animated". The filter adds a smoothed, inverted, and (sometimes) time shifted v...
     
Video tooning
Found in: ACM Transactions on Graphics (TOG)
By Heung-Yeung Shum, Jue Wang, Michael F. Cohen, Yingqing Xu
Issue Date:August 2004
pp. 574-583
We describe a system for transforming an input video into a highly abstracted, spatio-temporally coherent cartoon animation with a range of styles. To achieve this, we treat video as a space-time volume of image data. We have developed an anisotropic kerne...
     
Wang Tiles for image and texture generation
Found in: ACM SIGGRAPH 2003 Papers (SIGGRAPH '03)
By Jonathan Shade, Michael F. Cohen, Oliver Deussen, Stefan Hiller
Issue Date:July 2003
pp. 56-ff
We present a simple stochastic system for non-periodically tiling the plane with a small set of Wang Tiles. The tiles may be filled with texture, patterns, or geometry that when assembled create a continuous representation. The primary advantage of using W...
     
Stylized video cubes
Found in: Proceedings of the 2002 ACM SIGGRAPH/Eurographics symposium on Computer animation (SCA '02)
By Adam Finkelstein, Allison W. Klein, Michael F. Cohen, Peter-Pike J. Sloan
Issue Date:July 2002
pp. 15-22
We present a new set of non-photorealistic rendering (NPR) tools for processing video. Our approach is to treat the video as a space-time volume of image data. Previous tools to process video for an impressionist effect have painted collections of two-dime...
     
Video mosaics
Found in: Proceedings of the second international symposium on Non-photorealistic animation and rendering (NPAR '02)
By Adam Finkelstein, Allison W. Klein, Michael F. Cohen, Tyler Grant
Issue Date:June 2002
pp. 21-ff
We present a method for creating a video mosaic, a two-dimensional arrangement of small source videos (tiles) that suggests a larger, unified target video. We develop a distance measure to assess the match between source and target based on average color a...
     
Time critical lumigraph rendering
Found in: Proceedings of the 1997 symposium on Interactive 3D graphics (SI3D '97)
By Michael F. Cohen, Peter-Pike Sloan, Steven J. Gortler
Issue Date:April 1997
pp. 17-ff.
we present an exact and interactive collision detection system, I-COLLIDE, for large-scale environments. Such environments are characterized by the number of objects undergoing rigid motion and the complexity of the models. The algorithm does not assume th...
     
The virtual cinematographer: a paradigm for automatic real-time camera control and directing
Found in: Proceedings of the 23rd annual conference on Computer graphics and interactive techniques (SIGGRAPH '96)
By David H. Salesin, Li-wei He, Michael F. Cohen
Issue Date:August 1996
pp. 217-224
This paper describes a physically-based rendering system tailored to the demands of lighting design and architecture. The simulation uses a light-backwards ray-tracing method with extensions to efficiently solve the rendering equation under most conditions...
     
Efficient generation of motion transitions using spacetime constraints
Found in: Proceedings of the 23rd annual conference on Computer graphics and interactive techniques (SIGGRAPH '96)
By Bobby Bodenheimer, Brian Guenter, Charles Rose, Michael F. Cohen
Issue Date:August 1996
pp. 147-154
This paper describes a physically-based rendering system tailored to the demands of lighting design and architecture. The simulation uses a light-backwards ray-tracing method with extensions to efficiently solve the rendering equation under most conditions...
     
The lumigraph
Found in: Proceedings of the 23rd annual conference on Computer graphics and interactive techniques (SIGGRAPH '96)
By Michael F. Cohen, Radek Grzeszczuk, Richard Szeliski, Steven J. Gortler
Issue Date:August 1996
pp. 43-54
This paper describes a physically-based rendering system tailored to the demands of lighting design and architecture. The simulation uses a light-backwards ray-tracing method with extensions to efficiently solve the rendering equation under most conditions...
     
Hierarchical and variational geometric modeling with wavelets
Found in: Proceedings of the 1995 symposium on Interactive 3D graphics (SI3D '95)
By Michael F. Cohen, Steven J. Gortler
Issue Date:April 1995
pp. 35-ff.
This paper discusses how wavelet techniques may be applied to a variety of geometric modeling tools. In particular, wavelet decompositions are shown to be useful for hierarchical control point or least squares editing. In addition, direct curve and surface...
     
Accelerated MPEG compression of dynamic polygonal scenes
Found in: Proceedings of the 21st annual conference on Computer graphics and interactive techniques (SIGGRAPH '94)
By Dan S. Wallach, Michael F. Cohen, Sharma Kunapalli
Issue Date:July 1994
pp. 193-196
This paper describes a methodology for using the matrix-vector multiply and scan conversion hardware present in many graphics workstations to rapidly approximate the optical flow in a scene. The optical flow is a 2-dimensional vector field describing the o...
     
Hierarchical spacetime control
Found in: Proceedings of the 21st annual conference on Computer graphics and interactive techniques (SIGGRAPH '94)
By Michael F. Cohen, Steven J. Gortler, Zicheng Liu
Issue Date:July 1994
pp. 35-42
Specifying the motion of an animated linked figure such that it achieves given tasks (e.g., throwing a ball into a basket) and performs the tasks in a realistic fashion (e.g., gracefully, and following physical laws such as gravity) has been an elusive goa...
     
Wavelet radiosity
Found in: Proceedings of the 20th annual conference on Computer graphics and interactive techniques (SIGGRAPH '93)
By Michael F. Cohen, Pat Hanrahan, Peter Schroder, Steven J. Gortler
Issue Date:September 1993
pp. 221-230
We describe a fast method for creating physically based animationof non-rigid objects. Rapid simulation of non- rigid behavior isbased on global deformations. Con- straints are used to connectnon-rigid pieces to each other, forming complex models. Constrai...
     
Radioptimization: goal based rendering
Found in: Proceedings of the 20th annual conference on Computer graphics and interactive techniques (SIGGRAPH '93)
By James S. Painter, John K. Kawai, Michael F. Cohen
Issue Date:September 1993
pp. 147-154
We describe a fast method for creating physically based animationof non-rigid objects. Rapid simulation of non- rigid behavior isbased on global deformations. Con- straints are used to connectnon-rigid pieces to each other, forming complex models. Constrai...
     
Interactive spacetime control for animation
Found in: Proceedings of the 19th annual conference on Computer graphics and interactive techniques (SIGGRAPH '92)
By Michael F. Cohen
Issue Date:July 1992
pp. 110-111
We describe a fast method for creating physically based animationof non-rigid objects. Rapid simulation of non- rigid behavior isbased on global deformations. Con- straints are used to connectnon-rigid pieces to each other, forming complex models. Constrai...
     
Volume seedlings
Found in: Proceedings of the 1992 symposium on Interactive 3D graphics (SI3D '92)
By James Painter, Kwan-Liu Ma, Michael F. Cohen, Mihir Mehta
Issue Date:June 1992
pp. 139-145
We first outline an overall design philosophy for rigid geometric manipulations, then examine a manipulation's characteristics: nesting, scope, pivot constraints, and axis, constraints. We show how a mnemonic notation helps us explain how a simple matrix o...
     
A progressive refinement approach to fast radiosity image generation
Found in: Proceedings of the 15th annual conference on Computer graphics and interactive techniques (SIGGRAPH '88)
By Donald P. Greenberg, John R. Wallace, Michael F. Cohen, Shenchang Eric Chen
Issue Date:June 1988
pp. 283-284
There is considerable research activity related to computer graphics within the Japanese academic community. However, little is known about it outside of Japan. Another problem is that some of the most interesting work being done is not called “Compu...
     
A two-pass solution to the rendering equation: A synthesis of ray tracing and radiosity methods
Found in: Proceedings of the 14th annual conference on Computer graphics and interactive techniques (SIGGRAPH '87)
By Donald P. Greenberg, John R. Wallace, Michael F. Cohen
Issue Date:August 1987
pp. 283-284
There is considerable research activity related to computer graphics within the Japanese academic community. However, little is known about it outside of Japan. Another problem is that some of the most interesting work being done is not called “Compu...
     
Controlling dynamic simulation with kinematic constraints
Found in: Proceedings of the 14th annual conference on Computer graphics and interactive techniques (SIGGRAPH '87)
By Michael F. Cohen, Paul M. Isaacs
Issue Date:August 1987
pp. 283-284
There is considerable research activity related to computer graphics within the Japanese academic community. However, little is known about it outside of Japan. Another problem is that some of the most interesting work being done is not called “Compu...
     
A radiosity method for non-diffuse environments
Found in: Proceedings of the 13th annual conference on Computer graphics and interactive techniques (SIGGRAPH '86)
By David S. Immel, Donald P. Greenberg, Michael F. Cohen
Issue Date:August 1986
pp. 283-284
There is considerable research activity related to computer graphics within the Japanese academic community. However, little is known about it outside of Japan. Another problem is that some of the most interesting work being done is not called “Compu...
     
The hemi-cube: a radiosity solution for complex environments
Found in: Proceedings of the 12th annual conference on Computer graphics and interactive techniques (SIGGRAPH '85)
By Donald P. Greenberg, Michael F. Cohen
Issue Date:July 1985
pp. 283-284
There is considerable research activity related to computer graphics within the Japanese academic community. However, little is known about it outside of Japan. Another problem is that some of the most interesting work being done is not called “Compu...
     
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