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Displaying 1-24 out of 24 total
Screen Space Anisotropic Blurred Soft Shadows by Efficient Separable Filtering Method
Found in: 2013 International Conference on Cyberworlds (CW)
By Zhongxiang Zheng,Suguru Saito
Issue Date:October 2013
pp. 124-131
Shadow mapping is an efficient method to generate shadows in real time computer graphics and has broad variations from hard to soft shadow synthesis. Soft shadowing based on shadow mapping is a blurring technique on a shadow map or on screen space. Blurrin...
 
Visualization and Color Harmonization Using Coloroid Color Space
Found in: 2013 International Conference on Cyberworlds (CW)
By Naoto Inose,Suguru Saito
Issue Date:October 2013
pp. 374
In this paper, we introduce the visualization methods of constraints on color harmony, and the color harmonization method on a hue, based on Coloroid color space, which is defined by Nemcsics.
 
Customizable Strokes for Localized Stylization of View-Dependent Lines Extracted from 3D Models
Found in: 2013 International Conference on Cyberworlds (CW)
By Luis Cardona,Suguru Saito
Issue Date:October 2013
pp. 140-146
We propose a method to stylize individual lines and preserve their properties as the viewpoint is modified. As the camera position changes and view-dependent lines move across the surface, we track each line in order to extract and store the areas of the s...
 
Generation of Grasping Poses for Object Manipulation
Found in: 2013 International Conference on Cyberworlds (CW)
By Kazuaki Hamada,Fumihito Kyota,Suguru Saito
Issue Date:October 2013
pp. 369
We propose a method to generate grasping poses which can be used as the initial state of a motion to manipulate a given object.
 
Design and Evaluation of More Accurate Gradient Operators on Hexagonal Lattices
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Tetsuo Shima, Suguru Saito, Masayuki Nakajima
Publication Date: November 2009
pp. N/A
Digital two-dimensional images are usually sampled on square lattices, while the receptors of the human eye are following a hexagonal structure. It is the main motivation for adopting hexagonal lattices. The fundamental operation in many image processing a...
 
Range of motion estimation from Mocap data
Found in: Cyberworlds, International Conference on
By Hiroshi Yasuda, Suguru Saito, Masayuki Nakajima
Issue Date:November 2005
pp. 483-489
In this paper, we propose a novel technique to estimate joint ROM (Range of motion) from Mocap (Motion capture) data. For each joint, the probability density function of joint angle is estimated by Mixture of Gaussian, and the angle space is divided into V...
 
Detection and Evaluation of Grasping Positions for Autonomous Agents
Found in: Cyberworlds, International Conference on
By Fumihito Kyota, Tomoyuki Watabe, Suguru Saito, Masayuki Nakajima
Issue Date:November 2005
pp. 453-460
<p>The action of grasping an object is very important for a humanoid agent with hand, evolving autonomously in a virtual world. If an agent is given the order
 
A Framework for Transfer Colors Based on the Basic Color Categories
Found in: Computer Graphics International Conference
By Youngha Chang, Suguru Saito, Masayuki Nakajima
Issue Date:July 2003
pp. 176
Usually, paintings are more appealing than photographic images. This is because paintings have styles. This style can be distinguished by looking at elements such as motif, color, shape deformation and brush texture. In our work, we focus on the effect of
 
Real Time Detection Interface For Walking on CAVE
Found in: Computer Graphics International Conference
By Salvador Barrera, Piperakis Romanos, Suguru Saito, Hiroki Takahashi, Masayuki Nakajima
Issue Date:July 2003
pp. 105
Presently, most virtual reality systems use upper body parts to interact with objects in the virtual environment. This situation is caused by technological limitations of current interface devices. Starting from this viewpoint we developed a new interface ...
 
Generation of Varying Line Thickness
Found in: Computer Graphics International Conference
By Suguru Saito, Akane Kani, Youngha Chang, Masayuki Nakajima
Issue Date:July 2003
pp. 294
This paper describes an algorithm that generates lines of varying thickness without any special information about the lines. The thickness is derived from only curvature and lengths from both ends. Therefore the algorithm is applicable in a variety of line...
 
Design and Evaluation of More Accurate Gradient Operators on Hexagonal Lattices
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Tetsuo Shima, Suguru Saito, Masayuki Nakajima
Issue Date:June 2010
pp. 961-973
Digital two-dimensional images are usually sampled on square lattices, while the receptors of the human eye are following a hexagonal structure. It is the main motivation for adopting hexagonal lattices. The fundamental operation in many image processing a...
 
A Study of the Efficiency of Line Renderings of 3D Shapes
Found in: Cyberworlds, International Conference on
By Alexis Andre, Suguru Saito, Masayuki Nakajima
Issue Date:October 2007
pp. 257-264
Shape perception depends on a lot of factors, for example texture or shade. When rendering a surface, the question whether the viewer correctly understands the shape of the rendered object is open. The use of different rendering methods can improve or harm...
 
Contour-driven brush stroke synthesis
Found in: ACM SIGGRAPH ASIA 2009 Sketches (SIGGRAPH ASIA '09)
By Hamid Laga, Masayuki Nakajima, Suguru Saito, Xie Ning
Issue Date:December 2009
pp. 1-1
We propose in this paper an interactive sketch-based system for simulating oriental brush strokes on complex shapes. We introduce a contour-driven approach where the user inputs contours to represent complex shapes, the system estimates automatically the o...
     
CrossSketch: freeform surface modeling with details
Found in: Proceedings of the 4th Eurographics workshop on Sketch-based interfaces and modeling (SBIM '07)
By Alexis Andre, Masayuki Nakajima, Suguru Saito
Issue Date:August 2007
pp. 48-55
This paper presents a novel technique to model a three dimensional freeform surface, in its global shape and small details, using a sketching interface, from a single point of view. In the past, most modeling systems that used sketches as input reconstruct...
     
Sketch-to-collage
Found in: ACM SIGGRAPH 2007 posters on XX (SIGGRAPH '07)
By David Gavilan, Masayuki Nakajima, Suguru Saito
Issue Date:August 2007
pp. 35-es
Using query-by-sketch we propose an application to efficiently create collages from image collections. Using rough color strokes that represent the target collage, images are automatically retrieved from a database and segmented to synthesize a new image. ...
     
Motion belts
Found in: ACM SIGGRAPH 2007 sketches on XX (SIGGRAPH '07)
By Hiroshi Yasuda, Masayuki Nakajima, Ryota Kaihara, Suguru Saito
Issue Date:August 2007
pp. 46-es
Large scale motion databases have became essential for both computer animation and human motion analysis. We propose a novel visualization style of motion clip's outlines that unfolds a motion clip into a 2D stripe of keyframes. We call it a motion belt. B...
     
Example-based color transformation for image and video
Found in: Proceedings of the 3rd international conference on Computer graphics and interactive techniques in Australasia and South East Asia (GRAPHITE '05)
By Masayuki Nakajima, Suguru Saito, Youngha Chang
Issue Date:November 2005
pp. 347-353
Color is very important in setting the mood of images and video sequences. For this reason, color transformation is one of the most important features in photo-editing or video post-production tools because even slight modifications of colors in an image c...
     
Paintbrush rendering of lines using HMMs
Found in: Proceedings of the 3rd international conference on Computer graphics and interactive techniques in Australasia and South East Asia (GRAPHITE '05)
By Masayuki Nakajima, Suguru Saito, Yuta Okabe
Issue Date:November 2005
pp. 91-98
We propose a new method that emulates the expressive appearance of paintbrush strokes on paper. In our system, brush footprint characteristics are modeled using Hidden Markov Models (HMMs). Once the model is trained by a data set of given strokes, it estim...
     
Sketch-based perception model for evaluating color segmentations
Found in: Proceedings of the 2nd symposium on Appied perception in graphics and visualization (APGV '05)
By David Gavilan, Hiroki Takahashi, Masayuki Nakajima, Suguru Saito
Issue Date:August 2005
pp. 167-167
Global purpose segmentation in uncontrolled environments, usually based on human perception, has gained attention in recent years [Comaniciu and Meer 2002]. In this work, we propose an evaluation method to measure how much close are the segmentation result...
     
Example-based color stylization based on categorical perception
Found in: Proceedings of the 1st Symposium on Applied perception in graphics and visualization (APGV '04)
By Keiji Uchikawa, Suguru Saito, Youngha Chang
Issue Date:August 2004
pp. 91-98
We describe a new computational approach to stylize the colors of an image by using a reference image. During processing, we take characteristics of human color perception into account to generate more appealing results. Our system starts by classifying ea...
     
Are web pages characterized by color?
Found in: Proceedings of the 13th international World Wide Web conference on Alternate track papers & posters (WWW Alt. '04)
By Manabu Okumura, Norifumi Murayama, Suguru Saito
Issue Date:May 2004
pp. 248-249
When human guess the content of a web page,not only the text on the page but also its appearance is an important factor.However, there have been few studies on the relationshipbetween the content and visual appearance of a web page.We investigating the ten...
     
Rich curve drawing
Found in: ACM SIGGRAPH 2002 conference abstracts and applications (SIGGRAPH '02)
By Akane Kani, Masayuki Nakajima, Suguru Saito, Youngha Chang
Issue Date:July 2002
pp. 244-244
In simple style drawings, like Comics and traditional cel animation, curved strokes are relatively important. Of course, the shape of the curve is the most important. However, subtle changes of curve width cannot be ignored. We propose a powerful method al...
     
Color transformation based on the basic color categories of a painting
Found in: ACM SIGGRAPH 2002 conference abstracts and applications (SIGGRAPH '02)
By Masayuki Nakajima, Suguru Saito, Youngha Chang
Issue Date:July 2002
pp. 157-157
Each painter renders a painting in her own style. This style can be distinguished by looking at elements such as motif, color, shape deformation and texture. Previously, [Hertzmann et al. 2001] suggested a method for applying the texture of an image to a p...
     
3D physics-based brush model for painting
Found in: ACM SIGGRAPH 99 Conference abstracts and applications (SIGGRAPH '99)
By Masayuki Nakajima, Suguru Saito
Issue Date:August 1999
pp. 226
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...
     
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