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Displaying 1-40 out of 40 total
Multi-operator media retargeting
Found in: ACM Transactions on Graphics (TOG)
By Ariel Shamir, Michael Rubinstein, Shai Avidan, Ariel Shamir, Michael Rubinstein, Shai Avidan, Ariel Shamir, Michael Rubinstein, Shai Avidan, Ariel Shamir, Michael Rubinstein, Shai Avidan
Issue Date:July 2009
pp. 1-2
Content aware resizing gained popularity lately and users can now choose from a battery of methods to retarget their media. However, no single retargeting operator performs well on all images and all target sizes. In a user study we conducted, we found tha...
     
Filling Your Shelves: Synthesizing Diverse Style-Preserving Artifact Arrangements
Found in: IEEE Transactions on Visualization and Computer Graphics
By Lucas Majerowicz,Ariel Shamir,Alla Sheffer,Holger H. Hoos
Issue Date:November 2014
pp. 1507-1518
Our homes and workspaces are filled with collections of dozens of artifacts laid out on surfaces such as shelves, counters, and mantles. The content and layout of these arrangements reflect both context, e.g., kitchen or living room, and style, e.g., neat ...
 
Motion fields to predict play evolution in dynamic sport scenes
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Kihwan Kim, Matthias Grundmann, Ariel Shamir, Iain Matthews, Jessica Hodgins, Irfan Essa
Issue Date:June 2010
pp. 840-847
Videos of multi-player team sports provide a challenging domain for dynamic scene analysis. Player actions and interactions are complex as they are driven by many factors, such as the short-term goals of the individual player, the overall team strategy, th...
 
Generating Comics from 3D Interactive Computer Graphics
Found in: IEEE Computer Graphics and Applications
By Ariel Shamir, Michael Rubinstein, Tomer Levinboim
Issue Date:May 2006
pp. 53-61
There are times when computer graphics is required to be succinct and simple. Carefully chosen simplified and static images can portray a story narration as effectively as 3D photorealistic dynamic graphics. This article presents an automatic system that t...
 
Intelligent Mesh Scissoring Using 3D Snakes
Found in: Computer Graphics and Applications, Pacific Conference on
By Yunjin Lee, Seungyong Lee, Ariel Shamir, Daniel Cohen-Or, Hans-Peter Seidel
Issue Date:October 2004
pp. 279-287
Mesh partitioning and parts extraction have become key ingredients for many mesh manipulation applications both manual and automatic. In this paper, we present an intelligent scissoring operator for meshes which supports both automatic segmentation and man...
 
A Formulation of Boundary Mesh Segmentation
Found in: 3D Data Processing Visualization and Transmission, International Symposium on
By Ariel Shamir
Issue Date:September 2004
pp. 82-89
We present a formulation of boundary mesh segmentation as an optimization problem. Previous segmentation solutions are classified according to the different segmentation goals, the optimization criteria and the various algorithmic techniques used. We ident...
 
Feature-Sensitive 3D Shape Matching
Found in: Computer Graphics International Conference
By Andrey Sharf, Ariel Shamir
Issue Date:June 2004
pp. 596-599
Three dimensional shape matching plays an important role in many of today?s applications. Nevertheless, shape matching is a difficult problem since there is no unique measure that defines shape similarity and since computing shape distance using various me...
 
Feature-Space Analysis of Unstructured Meshes
Found in: Visualization Conference, IEEE
By Ariel Shamir
Issue Date:October 2003
pp. 25
Unstructured meshes are often used in simulations and imaging applications. They provide advanced flexibility in modeling abilities but are more difficult to manipulate and analyze than regular data. This work provides a novel approach for the analysis of ...
 
Multi-Resolution Dynamic Meshes with Arbitrary Deformation
Found in: Visualization Conference, IEEE
By Ariel Shamir, Valerio Pascucci, Chandrajit Bajaj
Issue Date:October 2000
pp. 73
Multi-resolution techniques and models have been shown to be effective for the display and transmission of large static geometric object. Dynamic environments with internally deforming models and scientific simulations using dynamic meshes pose greater cha...
 
A comparative study of image retargeting
Found in: ACM Transactions on Graphics (TOG)
By Ariel Shamir, Diego Gutierrez, Michael Rubinstein, Olga Sorkine, Ariel Shamir, Diego Gutierrez, Michael Rubinstein, Olga Sorkine
Issue Date:December 2010
pp. 1-12
The numerous works on media retargeting call for a methodological approach for evaluating retargeting results. We present the first comprehensive perceptual study and analysis of image retargeting. First, we create a benchmark of images and conduct a large...
     
Cone carving for surface reconstruction
Found in: ACM Transactions on Graphics (TOG)
By Ariel Shamir, Daniel Cohen-Or, Hao Zhang, Shy Shalom, Ariel Shamir, Daniel Cohen-Or, Hao Zhang, Shy Shalom
Issue Date:December 2010
pp. 1-12
We present cone carving, a novel space carving technique supporting topologically correct surface reconstruction from an incomplete scanned point cloud. The technique utilizes the point samples not only for local surface position estimation but also to obt...
     
Relief analysis and extraction
Found in: ACM Transactions on Graphics (TOG)
By Ariel Shamir, Ayellet Tal, Rony Zatzarinni, Ariel Shamir, Ayellet Tal, Rony Zatzarinni
Issue Date:December 2009
pp. 1-2
We present an approach for extracting reliefs and details from relief surfaces. We consider a relief surface as a surface composed of two components: a base surface and a height function which is defined over this base. However, since the base surface is u...
     
Sketch2Photo: internet image montage
Found in: ACM Transactions on Graphics (TOG)
By Ariel Shamir, Ming-Ming Cheng, Ping Tan, Shi-Min Hu, Tao Chen, Ariel Shamir, Ming-Ming Cheng, Ping Tan, Shi-Min Hu, Tao Chen
Issue Date:December 2009
pp. 1-2
We present a system that composes a realistic picture from a simple freehand sketch annotated with text labels. The composed picture is generated by seamlessly stitching several photographs in agreement with the sketch and text labels; these are found by s...
     
Filling Your Shelves: Synthesizing Diverse Style-Preserving Artifact Arrangements
Found in: IEEE Transactions on Visualization and Computer Graphics
By Lucas Majerowicz,Ariel Shamir,Alla Sheffer,Holger H. Hoos
Issue Date:October 2013
pp. 1
Our homes and workspaces are filled with collections of dozens of artifacts laid out on surfaces such as shelves, counters, and mantles. The content and layout of these arrangements reflect both context, e.g. kitchen or living room, and style, e.g. neat or...
 
Colorplate: Automated Creation of Movie Summaries in Interactive Virtual Environments
Found in: Virtual Reality Conference, IEEE
By Doron Friedman, Yishai A. Feldman, Ariel Shamir, Tsvi Dagan
Issue Date:March 2004
pp. 290
No summary available.
   
3-Sweep: extracting editable objects from a single photo
Found in: ACM Transactions on Graphics (TOG)
By Ariel Shamir, Shi-Min Hu, Daniel Cohen-Or, Tao Chen, Zhe Zhu
Issue Date:November 2013
pp. 1-10
We introduce an interactive technique for manipulating simple 3D shapes based on extracting them from a single photograph. Such extraction requires understanding of the components of the shape, their projections, and relations. These simple cognitive tasks...
     
Content-adaptive image downscaling
Found in: ACM Transactions on Graphics (TOG)
By Johannes Kopf, Ariel Shamir, Pieter Peers
Issue Date:November 2013
pp. 1-8
This paper introduces a novel content-adaptive image downscaling method. The key idea is to optimize the shape and locations of the downsampling kernels to better align with local image features. Our content-adaptive kernels are formed as a bilateral combi...
     
Style and abstraction in portrait sketching
Found in: ACM Transactions on Graphics (TOG)
By Ariel Shamir, Elizabeth Carter, Itamar Berger, Jessica Hodgins, Moshe Mahler
Issue Date:July 2013
pp. 1-12
We use a data-driven approach to study both style and abstraction in sketching of a human face. We gather and analyze data from a number of artists as they sketch a human face from a reference photograph. To achieve different levels of abstraction in the s...
     
Qualitative organization of collections of shapes via quartet analysis
Found in: ACM Transactions on Graphics (TOG)
By Alla Sheffer, Ariel Shamir, Chao-Hui Shen, Daniel Cohen-Or, Hao Zhang, Shi-Min Hu, Shi-Sheng Huang
Issue Date:July 2013
pp. 1-10
We present a method for organizing a heterogeneous collection of 3D shapes for overview and exploration. Instead of relying on quantitative distances, which may become unreliable between dissimilar shapes, we introduce a qualitative analysis which utilizes...
     
Co-hierarchical analysis of shape structures
Found in: ACM Transactions on Graphics (TOG)
By Ariel Shamir, Daniel Cohen-Or, Hao Zhang, Kai Xu, Oliver van Kaick, Shuyang Sun, Yanzhen Wang
Issue Date:July 2013
pp. 1-10
We introduce an unsupervised co-hierarchical analysis of a set of shapes, aimed at discovering their hierarchical part structures and revealing relations between geometrically dissimilar yet functionally equivalent shape parts across the set. The core prob...
     
Stackabilization
Found in: ACM Transactions on Graphics (TOG)
By Ariel Shamir, Daniel Cohen-Or, Hao Zhang, Honghua Li, Ibraheem Alhashim
Issue Date:November 2012
pp. 1-9
We introduce the geometric problem of stackabilization: how to geometrically modify a 3D object so that it is more amenable to stacking. Given a 3D object and a stacking direction, we define a measure of stackability, which is derived from the gap between ...
     
Micro perceptual human computation for visual tasks
Found in: ACM Transactions on Graphics (TOG)
By Ariel Shamir, Daniel Cohen-Or, Yotam Gingold
Issue Date:August 2012
pp. 1-12
Human Computation (HC) utilizes humans to solve problems or carry out tasks that are hard for pure computational algorithms. Many graphics and vision problems have such tasks. Previous HC approaches mainly focus on generating data in batch, to gather bench...
     
Digital micrography
Found in: ACM SIGGRAPH 2011 papers (SIGGRAPH '11)
By Alla Sheffer, Ariel Shamir, Mikhail Bessmeltsev, Nathan Carr, Ron Maharik
Issue Date:August 2011
pp. 287-294
We present an algorithm for creating digital micrography images, or micrograms, a special type of calligrams created from minuscule text. These attractive text-art works successfully combine beautiful images with readable meaningful text. Traditional micro...
     
Digital micrography
Found in: ACM Transactions on Graphics (TOG)
By Alla Sheffer, Ariel Shamir, Mikhail Bessmeltsev, Nathan Carr, Ron Maharik
Issue Date:July 2011
pp. 1-33
We present an algorithm for creating digital micrography images, or micrograms, a special type of calligrams created from minuscule text. These attractive text-art works successfully combine beautiful images with readable meaningful text. Traditional micro...
     
A comparative study of image retargeting
Found in: ACM SIGGRAPH Asia 2010 papers (SIGGRAPH ASIA '10)
By Ariel Shamir, Diego Gutierrez, Michael Rubinstein, Olga Sorkine
Issue Date:December 2010
pp. 20-21
The numerous works on media retargeting call for a methodological approach for evaluating retargeting results. We present the first comprehensive perceptual study and analysis of image retargeting. First, we create a benchmark of images and conduct a large...
     
Cone carving for surface reconstruction
Found in: ACM SIGGRAPH Asia 2010 papers (SIGGRAPH ASIA '10)
By Ariel Shamir, Daniel Cohen-Or, Hao Zhang, Shy Shalom
Issue Date:December 2010
pp. 20-21
We present cone carving, a novel space carving technique supporting topologically correct surface reconstruction from an incomplete scanned point cloud. The technique utilizes the point samples not only for local surface position estimation but also to obt...
     
Visual media retargeting
Found in: ACM SIGGRAPH ASIA 2009 Courses (SIGGRAPH ASIA '09)
By Ariel Shamir, Olga Sorkine
Issue Date:December 2009
pp. 1-13
The increasing variety of commonly used display devices, especially mobile devices, requires adapting visual media to different resolutions and aspect ratios - a process called "retargeting." The media retargeting problem is further accentuated by the expl...
     
Relief analysis and extraction
Found in: ACM SIGGRAPH Asia 2009 papers (SIGGRAPH Asia '09)
By Ariel Shamir, Ayellet Tal, Rony Zatzarinni
Issue Date:December 2009
pp. 1-6
We present an approach for extracting reliefs and details from relief surfaces. We consider a relief surface as a surface composed of two components: a base surface and a height function which is defined over this base. However, since the base surface is u...
     
Sketch2Photo: internet image montage
Found in: ACM SIGGRAPH Asia 2009 papers (SIGGRAPH Asia '09)
By Ariel Shamir, Ming-Ming Cheng, Ping Tan, Shi-Min Hu, Tao Chen
Issue Date:December 2009
pp. 1-6
We present a system that composes a realistic picture from a simple freehand sketch annotated with text labels. The composed picture is generated by seamlessly stitching several photographs in agreement with the sketch and text labels; these are found by s...
     
Multi-operator media retargeting
Found in: ACM SIGGRAPH 2009 papers (SIGGRAPH '09)
By Ariel Shamir, Michael Rubinstein, Shai Avidan
Issue Date:August 2009
pp. 3-3
Content aware resizing gained popularity lately and users can now choose from a battery of methods to retarget their media. However, no single retargeting operator performs well on all images and all target sizes. In a user study we conducted, we found tha...
     
Seam carving for media retargeting
Found in: Communications of the ACM
By Ariel Shamir, Shai Avidan
Issue Date:January 2009
pp. 101-104
Traditional image resizing techniques are oblivious to the content of the image when changing its width or height. In contrast, media (i.e., image and video) retargeting take s content into account. For example, one would like to change the aspect ratio of...
     
Non-homogeneous resizing of complex models
Found in: ACM Transactions on Graphics (TOG)
By Alla Sheffer, Ariel Shamir, Daniel Cohen-Or, Vladislav Kraevoy
Issue Date:December 2008
pp. 1-49
Resizing of 3D models can be very useful when creating new models or placing models inside different scenes. However, uniform scaling is limited in its applicability while straightforward non-uniform scaling can destroy features and lead to serious visual ...
     
Improved seam carving for video retargeting
Found in: ACM Transactions on Graphics (TOG)
By Ariel Shamir, Michael Rubinstein, Shai Avidan
Issue Date:August 2008
pp. 1-49
Video, like images, should support content aware resizing. We present video retargeting using an improved seam carving operator. Instead of removing 1D seams from 2D images we remove 2D seam manifolds from 3D space-time volumes. To achieve this we replace ...
     
Model-based color manipulation
Found in: ACM SIGGRAPH 2007 posters on XX (SIGGRAPH '07)
By Ariel Shamir, Daniel Cohen-Or, Lior Gavish, Lior Shapira
Issue Date:August 2007
pp. 65-es
The manipulation of the colors in an image and color spaces in general can be highly complex and non-intuitive. Converting the thoughts or vision of the designer to specific color modifications on an image is hard, while envisioning the effect of a specifi...
     
Part analogies of 3D objects
Found in: ACM SIGGRAPH 2007 posters on XX (SIGGRAPH '07)
By Ariel Shamir, Daniel Cohen-Or, Lior Shapira
Issue Date:August 2007
pp. 14-es
Geometric manipulation of 3D objects can benefit from analogies among similar shapes and parts. However, analogies that are easily found by humans are difficult to detect and maintain in algorithms that manipulate 3D meshes. One of the reasons for this is ...
     
Seam carving for content-aware image resizing
Found in: ACM Transactions on Graphics (TOG)
By Ariel Shamir, Shai Avidan
Issue Date:July 2007
pp. 1-35
Effective resizing of images should not only use geometric constraints, but consider the image content as well. We present a simple image operator called seam carving that supports content-aware image resizing for both reduction and expansion. A seam is an...
     
Narrative algorithm visualization
Found in: Proceedings of the 2006 ACM symposium on Software visualization (SoftVis '06)
By Ariel Shamir, Hilla Starovisky, Marina Blumenkrants
Issue Date:September 2006
pp. 17-26
Visualization of algorithms has been shown to be a useful aid for educational purposes. In this work we focus on the creation of algorithm visualizations based on viewing the visualization as a narrative. This view promotes the creator to form a central pl...
     
Temporal and spatial level of details for dynamic meshes
Found in: Proceedings of the ACM symposium on Virtual reality software and technology (VRST '01)
By Ariel Shamir, Valerio Pascucci
Issue Date:November 2001
pp. 77-84
Multi-resolution techniques enhance the ability of graphics and visual systems to overcome limitations in time, space and transmission costs. Numerous techniques have been presented which concentrate on creating level of detail models for static meshes. Ti...
     
LiveType: a parametric font model based on features and constraints
Found in: ACM SIGGRAPH 97 Visual Proceedings: The art and interdisciplinary programs of SIGGRAPH '97 (SIGGRAPH '97)
By Ari Rappoport, Ariel Shamir
Issue Date:August 1997
pp. 160
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...
     
Constraint-based approach for automatic hinting of digital typefaces
Found in: ACM Transactions on Graphics (TOG)
By Ariel Shamir
Issue Date:January 1991
pp. 131-151
The rasterization process of characters from digital outline fonts to bitmaps on displays must include additional information in the form of hints beside the shape of characters in order to produce high quality bitmaps. Hints describe constraints on sizes ...
     
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