Yuki Koyama

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This paper introduces novel interactive techniques for designing original hand-launched free-flight glider airplanes which can actually fly. The aerodynamic properties of a glider aircraft depend on their shape, imposing significant design constraints. We present a compact and efficient representation of glider aerodynamics that can be fit to real-world(More)
We present an example-based elastic deformation method that runs in real time. Example-based elastic deformation was originally presented by Martin et al. [MTGG11], where an artist can intuitively control elastic material behaviors by simply giving example poses. Their FEM-based approach is, however, computationally expensive requiring nonlinear(More)
We present AutoConnect, an automatic method that creates customized, 3D-printable connectors attaching two physical objects together. Users simply position and orient virtual models of the two objects that they want to connect and indicate some auxiliary information such as weight and dimensions. Then, AutoConnect creates several alternative designs that(More)
Parameter tweaking is one of the fundamental tasks in the editing of visual digital contents, such as correcting photo color or executing blendshape facial expression control. A problem with parameter tweaking is that it often requires much time and effort to explore a high-dimensional parameter space. We present a new technique to analyze such(More)
This paper presents view-dependent control of elastic rod simulation for 3D character animation. Elastic rod simulation is often used in character animation to generate motion of passively deforming body parts such as hair, ear, and whiskers. Our goal is to allow artistic control of the simulation in a view-dependent way, for example to move a hair strand(More)
Color enhancement is a very important aspect of photo editing. Even when photographers have tens of or hundreds of photographs, they must enhance each photo one by one by manually tweaking sliders in software such as brightness and contrast, because automatic color enhancement is not always satisfactory for them. To support this repetitive manual task, we(More)
Figure 1: The proposed framework automatically generates a dual model from a medical image. The dual model comprises a graph structure for elastic simulation and a surface mesh for visualization. Using this framework, we developed a multi-touch browser application with interactive deformation function. Abstract We present a data structure for interactive(More)
Polycarbonate is mainly a condensed polymer of bisphenol A and carbonyl chloride or diphenyl carbonate. Since it is transparent, has excellent heat resistance and impact resistance, and can be used for high-temperature uses and for microwave ovens, it is used in items such as children's tableware, tableware for meat services, coffee makers and food(More)
Participated an internship program, and conducted a research project about computational design of 3D-printable objects. Funded for half a year as a project leader of an exploratory software project, IPA MITOH Program, and developed a physics engine for real-time computer animations. Developed some AR Apps for iOS and Android OS.