• Journal of IKEEE
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• v.13 no.2
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• pp.253-259
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• 2009

In this paper, we propose a novel architecture of a general graphics shader processor without a dedicated hardware. Recently, mobile devices require the high performance graphics processor as well as the small size, low power. The proposed shader processor is a GP-GPU(General-Purpose computing on Graphics Processing Units) to execute the whole OpenGL ES 2.0 graphics pipeline by using shader instructions. It does not require the separate dedicate H/W such as rasterization on this fully programmable capability. The fully programmable 3D graphics shader processor can reduce much of the graphics hardware. The chip size of the designed shader processor is reduced 60% less than the sizes of previous processors.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2003.10a
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• pp.272-276
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• 2003

In this paper, current application of VR in naval architecture and ocean eng. Design is surveyed and VR process is implemented in ship navigation system. So far, very sophisticated VR applications have announced but not published yet. The reason not published may be that the application is for the navy ship of which the information could not be opened to the public. Also there is another area implementing Simulation Based Design, i..e., visualization of the integration process from initial design to the manufacturing. Herein, the tendency of VR in this area is surveyed, so the international application of VR is introduced. Trough the analysis the most appropriate applicability of VR in this area can be distinguished. And to show the application, ship navigation VR is programmed using OpenGL graphics software.

• The Journal of the Korea Contents Association
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• v.13 no.8
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• pp.44-51
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• 2013

Raster operations are widely used to display full-color graphics images (or pixmaps) and single-color images (or bitmaps). These features are strongly needed for image processing applications and font output. However, current mobile graphics platforms, including OpenGL ES hardware implementations, do not directly support these features. To fully support those raster operations on the mobile graphics platforms, we interpreted the graphics images as a set of 3D points, and processed those 3D points through the typical 3D geometry pipelines, in a full-software implementation. Our implementation shows sufficient execution speeds, and passed the official conformance tests to show its correctness.

• Proceedings of the KOSOMBE Conference
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• v.1997 no.05
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• pp.362-365
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• 1997

To visualize electrical activities in the cerebral cortex, we develop the 3D topographic mapping system based on PC. For this work, we utilize OpenGL tool and an optimized interpolation method known as 3D barycentric algotithm, which has a little computational complexity. OpenGL processes the 3D coordinates, and 3D barycentric algotithm interpolates to get overall EEGs with EEGs measured from finite electrodes on 3D. To prove validity of this algorithm on the PC-based system, we developped Windows-based 3D topographic mapping program using the Barycentric algorithm. The result showed that the performance of this system is comparable to that of workstation in terms of speed and precision. Also, the result of clinical test was the same as that of a EEG technician's analysis.

• Proceedings of the KSRS Conference
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• v.1
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• pp.417-420
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• 2006

In these days, mobile application dealing with information contents on mobile or handheld devices such as mobile communicator, PDA or WAP device face the most important industrial needs. The motivation of this study is the design and implementation of mobile application using high resolution satellite imagery, large-sized image data set. Although major advantages of mobile devices are portability and mobility to users, limited system resources such as small-sized memory, slow CPU, low power and small screen size are the main obstacles to developers who should handle a large volume of geo-based 3D model. Related to this, the previous works have been concentrated on GIS-based location awareness services on mobile; however, the mobile 3D terrain model, which aims at this study, with the source data of DEM (Digital Elevation Model) and high resolution satellite imagery is not considered yet, in the other mobile systems. The main functions of 3D graphic processing or pixel pipeline in this prototype are implemented with OpenGL|ES (Embedded System) standard API (Application Programming Interface) released by Khronos group. In the developing stage, experiments to investigate optimal operation environment and good performance are carried out: TIN-based vertex generation with regular elevation data, image tiling, and image-vertex texturing, text processing of Unicode type and ASCII type.

• Journal of the Society of Naval Architects of Korea
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• v.36 no.1
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• pp.99-108
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• 1999

The solid modelling program was developed for the 3-D representation and analysis of VEry High-rise Steel Artificial Reefs(VEHSAR) using Visual C++ on the Microsoft's Windows 95(or Windows NT) based on MFC(Microsoft Foundation Class). Importing oriented-object program and CAD/CAM technique, this integrated design system which aims at low cost and high efficiency makes it possible to predict problems and to establish counterplans through visualizing the construction of Very High-rise Steel Artificial Reefs in advance. Also it is useful in enhancing productivity. Introduction of OpenGL makes it display high quality 3D graphics more faster.

• Journal of Digital Convergence
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• v.12 no.6
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• pp.549-557
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• 2014

The learning application of the rotating object utilizing smart devices, it is possible by using the touch functionality and 3D graphics to enhance the realism and operational feeling, and to overcome the limitations of learning content existing. In this study, I designed a "rotation class" based on the learning contents of elementary and middle mathematics education and developed the learning application which driven by smart Android-based device by using Andoroid API class and the OpenGL ES Because this application is driven by the smart devices, learners easily can make the rotated objects and observe them. It can be utilized in various for elementary and middle education.

• 한국HCI학회:학술대회논문집
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• 2007.02b
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• pp.249-255
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• 2007

컴퓨터 하드웨어 및 소프트웨어의 발전으로 그래픽 처리 기술은 날로 발전을 거듭하고 있으며 하드웨어의 기능을 최대한 이끌어내기 위한 소프트웨어 기술 또한 발전하고 있다. 이러한 발전으로 인하여 다양한 영상처리 분야에서 빠른 이미지 프로세싱이 가능하게 되었지만 빠른 이미지 프로세싱 능력에도 불구하고 프로그래밍 기술은 기존 것을 고수하고 있다. 일반적으로 사용해오던 기술은 높은 프로그래밍 지식을 필요로 하는 분야였고 이러한 이유로 이미지 프로세싱 기법을 전문적인 프로그래밍 지식이 부족한 예술계의 사용자가 이용하는 데에는 어려움이 있었다. 이러한 문제점을 해결하고 이미지 하드웨어 및 소프트웨어의 효율적인 사용 환경을 위하여 Apple사에서 OpenGL과 Objective-C를 이용한 좀더 간단한 이미지 프로세싱 기법인 코어 이미지(Core Image)를 개발하였다. OS와 어플리케이션 상에서 빠른 이미지 프로세싱을 위해 개발된 코어 이미지는 기존의 이미지 프로세싱 기법에서 복잡한 형태의 프로그래밍을 요했던 것과는 달리, 여러 이미지 프로세싱 기법을 간단한 플러그인 형태로 지원한다. 예술적인 측면에서 다양한 이미지 프로세싱 기법을 보다 손쉽게 사용할 수 있으며 사용 방법 또한 간단하여 전문적인 프로그램 지식이 부족한 일반 사용자도 예술적인 측면에서 이미지 프로세싱 기술을 쉽게 접목할 수 있도록 구성되어 있다. 하지만 코어 이미지가 국내에서는 소수의 사용자만이 이용하는 Mac OS에서만 사용 가능한 프로세싱 기술이라는 문제점 또한 지니고 있다. 본 논문에서는 코어 이미지의 개념과 구동 원리 및 실제 예술 작품에 적용된 사례를 분석하고, 이를 통하여 다양한 분야에서의 코어 이미지의 가능성에 대하여 전망해 본다.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.38 no.2
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• pp.27-32
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• 2001

In this paper, the three dimension scanner system employing the parallel camera model is discussed. The camera calibration process and the three dimension scanning algorithm are developed. The laser strip line is utilized for assisting stereo matching. An object being scanned rotates on the plate which is activated by a stepping motor, The world coordinate which is. the measured distance from the camera to the object is converted into the model coordinate. The facets created from the point. cloud of the model coordinate is used for rendering the scanned model by using the graphic library such as OpenGL. The unmatched points having no validate matching points are interpolated from the validate matching points of the vicinity epipolar lines.

• Journal of the Earthquake Engineering Society of Korea
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• v.5 no.5
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• pp.13-23
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• 2001

In the companion paper, F. E. formulation for the geometric and plastic non-linear analysis of steel jacket structures subjected to wave and earthquake loadings was presented and the main processor was developed. In this paper, the pre/post processor are developed in order to analyze the output results effectively as well as to prepare the input data efficiently. Furthermore, the numerical examples are presented and discussed for linear and non-linear analysis of steel jackets under environmental loadings.