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Yanggu, South Korea

Lim S.,Knowledge E learning Team | Lee D.,Kyonggi University | Shin B.-S.,Inha University
2011 International Conference on Information Science and Applications, ICISA 2011 | Year: 2011

For an efficient parallel volume ray casting suitable for recent multi-core CPUs, we propose an image-ordered approach by using a cost function to allocate loaded tasks impartially per each processing node. At the first frame, we divide an image space evenly, and we compute a cost function. By applying the frame coherence property, we divide the image space unevenly using the computed previous cost function since the next frame. Conventional image-ordered parallel approaches have focused on dividing and compositing volume datasets. However, the divisions and accumulations are negligible for recent multi-core CPUs because they are performed inside one physical CPU. As a result, we can reduce the rendering time without deteriorating the image quality by applying a cost function reflecting on all timeconsuming steps of the volume ray casting. © 2011 IEEE. Source


Lim S.,Knowledge E learning Team | Lee D.,Kyonggi University | Shin B.-S.,Inha University
Multimedia Tools and Applications | Year: 2014

For an efficient parallel volume ray casting suitable for recent multi-core CPUs, we propose an image-ordered approach by using a cost function to allocate loaded tasks impartially per each processing node. At the first frame, we divide an image space evenly, and we compute a cost function. By applying the frame coherence property, we divide the image space unevenly using the computed previous cost function since the next frame. Conventional image-ordered parallel approaches have focused on dividing and compositing volume datasets. However, the divisions and accumulations are negligible for recent multi-core CPUs because they are performed inside one physical CPU. As a result, we can reduce the rendering time without deteriorating the image quality by applying a cost function reflecting on all time-consuming steps of the volume ray casting. © 2011 Springer Science+Business Media, LLC. Source


Jee H.-K.,Knowledge E learning Team | Lim S.,Knowledge E learning Team | Youn J.,Knowledge E learning Team | Lee J.,Knowledge E learning Team
Multimedia Tools and Applications | Year: 2014

In recent years, augmented reality technologies have been a subject of great interest among the scientific community. However, most studies have focused on hardware and software development without particular emphasis on the authoring phase. As a consequence, the authoring process of augmented reality applications is accomplished today through hard-coding of a specific application. This approach, however, requires operators. In: the education applications, the hard-coding methods tend to be retained, despite remarkable technological developments in the industrial area. Textbooks are mainly used in educational systems and many educators are very passive about applying new materials. In: this paper, we present an immersive authoring tool for education using augmented reality, where applications authorized by our tool interact with the user in order to increase the learner's interest and reflect various desires of dynamic environment. Our authoring tool consists of a composing tool that can be used to create educational contents, a viewer that plays the content, and an engine to power the tool and viewer. © 2011 Springer Science+Business Media, LLC. Source


Jee H.-K.,Knowledge E learning Team | Lim S.,Knowledge E learning Team | Youn J.Y.,Knowledge E learning Team | Lee J.,Knowledge E learning Team
2011 International Conference on Information Science and Applications, ICISA 2011 | Year: 2011

In recent years augmented reality technologies have been subject of great interest among the scientific community. However, most researches have focused on hardware and software development without particular interest on the authoring phase. As a consequence the authoring process of an augmented reality application is done today through hard-coding of a specific application. This approach however requires operators. In education application, old-fashioned ways are kept especially in educational system, although technological developments in industrial area are remarkable nowadays. Textbooks are mainly used in educational systems and many educators are very passive about applying new materials in use. So, traditional methods are still used these days. We present an immersive authoring tool using the augmented reality, which interacts with user in order to increase learner's interest and reflect various desires that dynamic environment students have. It consists of composing tool that can be used to create educational contents, viewer that plays the contents and the engine which allows these what to happen. © 2011 IEEE. Source

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