• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.27 no.6
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• pp.679-688
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• 2009

Worldwide exploring and research for manganese nodules, as new energy resource, distributed on the deep seabed have progressed recently. Korea Ocean Research & Development Institute(KORDI) is a central organization to exploit the manganese nodules in the Pacific Ocean with 5,000m depth. Precise exploration is required for estimating amount of recoverable deposit, and this task could be accomplished by processing digital image processing techniques to the images taken by underwater camera system. Image processing and analysis provide information about characteristics of distribution of the manganese nodules. This study proposed effective methods to remove vignetting effect to improve image quality and to extract information. The results show more reliable information could be obtained by removing the vignetting and feasibility of utilizing image processing techniques for exploring the manganese nodules.

• Journal of the Institute of Convergence Signal Processing
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• v.10 no.4
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• pp.267-273
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• 2009

In this paper, we proposed a variable average operation for a WDR(Wide Dynamic Range). The previously proposed average operation [5] improves hardware efficiency and complexity by replacing divider with multiplier. However, the previously proposed method has some weak-points. For example, there are counting horizontal and vertical length, and then the multiplier selects a Mode set by the user when the lengths exactly correspond with the image's size in the Mode. To compensate some weak-points, we change a Mode selection methods as a using the image's total size. Also, we propose another feature that it can be applied to various image sizes. To get a more accurate average, we add an external compensation value. We design the variable average operation using a Verilog-HDL and confirm that the Serial Multiplier's structure is better efficiency than Split Multiplier's structure.

• Journal of Biosystems Engineering
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• v.21 no.3
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• pp.325-335
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• 1996

Visual features are crucial for monitoring the growth state, indexing the drying performance, and grading the quality of oak mushrooms. A computer vision system with neural net information processing technique was utilized to quantize quality factors of a dried oak mushrooms distributed over the cap and gill sides. In this paper, visual feature extraction algorithm were integrated with the neural net processing to deal with various fuzzy patterns of mushroom shapes and to compensate the fault sensitiveness of the crisp criteria and heuristic rules derived from the image processing results. The proposed algorithm improved the segmentation of the skin features of each side, the identification of cap and gill surfaces, the identification of stipe states and removal of the stipe, etc. And the visual characteristics of dried oak mushrooms were analyzed and primary visual features essential to tile quality evaluation were extracted and quantized. In this study, black and white gray images were captured and used for the algorithm development.

• Proceedings of the Korean Information Science Society Conference
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• 2005.07a
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• pp.634-636
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• 2005

모바일 단말 기반 동영상 서비스 기술에 관한 연구는 현재 활발히 수행되고 있으며, 유선 인터넷 기반에서 상용화가 가능한 기술 분야까지도 모바일 단말의 성능과 무선 네트워크 플랫폼의 빠른 발전에 힘입어 모바일에 응용하고자하는 시도 또한 계속되고 있다. 현재 모바일 단말 기반 영상서비스와 관련된 기술은 하드웨어적으로 구현하여 운영되고 있다. 그러나 하드웨어 기반으로 구현되어 서비스되고 있는 현재의 서비스 형태는 새로운 동영상 코덱 알고리즘과 동영상 데이터 통신에 대한 여러 제어 구조 변화에 대하여 탄력적으로 대응할 수 없다는 단점을 지니고 있다. 따라서 하드웨어적으로 구현된 영상서비스 기술을 소프트웨어적으로 처리하기 위한 디코더 개발은 필수적이라고 볼 수 있다. 이러한 소프트웨어 디코더의 개발을 통하여 새로운 동영상 미디어 플레이어 개발과 동영상 데이터 전송 방법 및 트래픽 제어 등과 같은 부가적인 기술의 변화에 즉각적 대응이 가능하다. 또한 추가적인 하드웨어 칩의 내장에 따른 모바일 단말기의 제조 원가절감과 모바일 단말기 재사용을 통한 자원 절감에 많은 기여가 가능하다. 본 논문에서는 WIPI 플랫폼을 기반으로 컴포넌트 기반 설계를 이용한 H.264 동영상 소프트웨어 디코더를 설계한다.

• Proceedings of the Korea Contents Association Conference
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• 2018.05a
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• pp.385-386
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• 2018

본 연구는 안동시 중구동을 사례로 역사문화자원을 활용한 도시재생 방안을 제안하였다. 주요내용은 관광상품개발, 체험프로그램, 축제이벤트, 스토리텔링, 영상콘텐츠개발, 환경정비가 있다.

• Journal of Korean Society for Geospatial Information Science
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• v.21 no.2
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• pp.27-34
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• 2013

Due to the increased interest in global warming, interest in forest resources aimed towards reducing greenhouse gases have subsequently increased. Thus far, data related to forest resources have been obtained, through the employment of aerial photographs or satellite images, by means of plotting. However, the use of imaging data is disadvantageous; merely, due to the fact that recorded measurements such as the height of trees, in dense forest areas, lack accuracy. Within such context, the authors of this study have presented a method of data processing in which an individual tree is isolated within forested areas through the use of LIDAR data and ortho-images. Such isolation resulted in the provision of more efficient and accurate data in regards to the height of trees. As for the data processing of LIDAR, the authors have generated a normalized digital surface model to extract tree points via local maxima filtering, and have additionally, with motives to extract forest areas, applied object oriented image classifications to the processing of data using ortho-images. The final tree point was then given a figure derived from the combination of LIDAR and ortho-images results. Based from an experiment conducted in the Yongin area, the authors have analyzed the merits and demerits of methods that either employ LIDAR data or ortho-images and have thereby obtained information of individual trees within forested areas by combining the two data; thus verifying the efficiency of the above presented method.

• Korean Journal of Construction Engineering and Management
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• v.5 no.5 s.21
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• pp.126-134
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• 2004

Since a construction project is a series of works that utilizes resources to accomplish the project goal for a given time period, efficient resource management is a prerequisite for the success of the project. Two major areas of resource management are resource constrained scheduling focusing on the limited resource availability and resource leveling focusing on smoothing resource usage pattern on the fixed project completion time. It is not available, however, to apply both techniques to a project at the same time. This paper proposes a model to enhance the minimum moment algorithm of resource leveling, aiming to find an efficient usage of resources and an appropriate project completion time. A survey was performed to evaluate the major five factors in the model. A case study demonstrates the value of the proposed resource leveling technique.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.679-682
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• 2011

무선 네트워크상의 이동 사용자의 동영상 요청에 따라 실시간 동영상 전송서비스를 지원하기 위한 무선 스트리밍 플랫폼 구조 및 방법을 제안한다. 무선 전송 채널은 잦은 네트워크 단절 및 전송 지연 등의 자원 한계성을 가지고 있다. 이러한 한계점들을 극복하고 이동 사용자가 요구하는 이동 실시간 스트리밍서비스를 지원하기 위해 프리패치(pre-fetch) 전송 캐싱 방법과 패킷손실보존(packet loss conservation) 방법을 가진 전송 에이전트 시스템을 제안한다.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.9
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• pp.75-81
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• 2014

The integral image is the sum of input image pixel values. It is mainly used to speed up processing of a box filter operation, such as Haar-like features. However, large memory for integral image data can be an obstacle on an embedded hardware environment with limited memory resources. Therefore, an efficient method to store the integral image is necessary. In this paper, we propose a memory size reduction hardware design for integral image. The hardware design is used two methods. It is the new integral image memory and modulo calculation for reducing integral image data. The new integral image memory has additional calculation overhead, but it is not obstacle in hardware environment that parallel processing is possible. In the Xilinx Virtex5-LX330T targeted experimental result, integral image memory can be reduced by 50% on a $640{\times}480$ 8-bit gray-scale input image.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.3
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• pp.369-376
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• 2014

Recent climate change and ensure each country's marine fisheries resources due to the sharp decline to address the eco-friendly farming has emerged. Marine aquaculture operations to provide ease of use for the fishing ship cranes. In this paper, we use the default handler for the shipping cranes and improve the working environment of the received video equipment in the work area through the monitoring and analysis of visual information to optimize the image, convenient and high visibility for workers to have real-time video guide system is proposed.