• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2005년도 추계종합학술대회
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• pp.1129-1132
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• 2005

In this paper, we proposed real-time stereoscopic image conversion algorithm using object segmentation and motion parallax. The proposed algorithm separates objects using luminance of image, extracts moving object among objects of the image using motion parallax and generates depth map. Parallax process is done based on the depth map. The proposed method has been evaluated using visual test and APD(Absolute Parallx Difference) for comparing the stereoscopic image of the proposed method with that of MTD. The proposed method offers realistic stereoscopic conversion effect regardless of the direction and velocity of the 2-D image.

• 전자공학회논문지S
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• 제34S권2호
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• pp.63-70
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• 1997

This paper proposes a new algorithm for recognizing polyhedral objects using a single 2-D image. It is base don a new representation scheme having two level hierarchey. In the lower level, geometrical features of each primitive surface are represented using their signatures and the variation of signature due to rotation is represented suing the rotation map. In the higher level, topological features are represented in the inter-surface description table(SDT). Based on the proposed representaton scheme, loer level database searched to find a matching primitive surface. The srotation map determines the degree of rotation as well as the matchness. If all surfaces in a test object find their matching primitive surfaces, its structural information is compared with the SDTs of object models. If primitive surfaces of a test object equal to tha tof certain model and satisfy inter-surfaces relationship in SDT, a test object is recognized as the model.

• Journal of information and communication convergence engineering
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• 제12권3호
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• pp.193-197
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• 2014

Edges are a robust feature for object detection. In this paper, we present an edge-based background modeling method for the detection of moving objects. The edges in the image frames were mapped using robust Canny edge detector. Two edge maps were created and combined to calculate the ultimate moving-edge map. By selecting all the edge pixels of the current frame above the defined threshold of the ultimate moving edges, a temporary background-edge map was created. If the frequencies of the temporary background edge pixels for several frames were above the threshold, then those edge pixels were treated as background edge pixels. We conducted a performance comparison with previous works. The existing edge-based moving-object detection algorithms pose some difficulty due to the changes in background motion, object shape, illumination variation, and noises. The result of the performance evaluation shows that the proposed algorithm can detect moving objects efficiently in real-world scenarios.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2006년도 하계종합학술대회
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• pp.697-698
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• 2006

In this paper, we propose a new scheme to generate multi-view images using a depth-image-based rendering (DIBR) technique. In order to improve the quality of multi-view images at newly exposed areas during mesh-based rendering, we preprocess the depth map using a Gaussian smoothing filter. Previous algorithms apply a smoothing filter to the whole depth map even if the depth map is collapsed. After extracting objects from the depth map, we apply the smoothing filter to their boundaries. Finally, we cannot only maintain the depth quality, but also generate high quality multi-view images. Experimental results show that our proposed algorithm outperforms previous works and supports an efficient depth keying technique.

• 대한산업공학회지
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• 제22권3호
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• pp.499-515
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• 1996

The basic function of on industrial robot system is to move objects in the workspace fast and accurately. One difficulty in performing this function is that the path of robot should be programmed to avoid the collision with obstacles, that is, tools, or facilities. This path planning requires much off-line programming time. In this study, a SOM technique to find the collision-free path of robot in real time is developed. That is, the collision-free map is obtained through SOM learning and a collision-free path is found using the map in real time during the robot operation. A learning procedure to obtain the map and an algorithm to find a short path using the map is developed and simulated. Finally, a path smoothing method to stabilize the motion of robot is suggested.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2006년도 춘계학술발표회 논문집
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• pp.393-398
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• 2006

Currently, 54 kinds of digital maps are provided by National Geographic Information Clearinghouse and the majority of those maps are based on aerial photographs or satellite image. The digital maps which symbolize and simplifies the topography and objects from ortho-photos does not reflect the objects 'shapes and facilities' changes. Especially, underground structures and complex building shapes are not correctly identifies by ortho-photos. Furthermore, the 1/1,000 and 1/500-1/2,500 maps for urban area produced by some local government or public organizations have detailed information with high precision, it is not easy to update the information due to the frequent changes of structures in the city. Although some efforts to solve this problem such as conducting field survey and shorten the survey period were tried, it is not the fundamental solution due to the high cost. Therefore, in this study, a realtime renewal and update of digital map using general survey are suggested. By assigning absolute coordinates to the general survey products and matching with digital maps, it is possible to update the digital map economically and rapidly. In addition, it is suggested that the construction of DB for general survey and sharing among survey companies to solve the duplicated survey.

• 인터넷정보학회논문지
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• 제11권2호
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• pp.173-184
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• 2010

유비쿼터스 네트워크 기술이 발전하면서 모바일 단말기를 이용한 인터넷 사용은 휴대성과 편의성뿐만 아니라 시간과 장소에 구애 받지 않기 때문에 점점 증가하고 있다. 그러나 모바일 단말기의 다양한 기종과 많은 마크업 언어의 종류 등의 원인으로 모바일 컨텐츠 제작은 많은 어려움을 겪고 있다. 본 논문에서는 편집한 모바일 웹 페이지를 모바일 단말기에서 서비스할때 편집한 화면과 동일한 형태로 서비스하기 위하여 이미지 맵 방법을 제안하였다. 제안된 이미지 맵 방법을 이용한 모바일 웹 서비스 방법은 웹 페이지를 구성하고 있는 여러 개의 객체들을 하나의 이미지로 캡쳐해서 서비스하는 방법이다. 제안된 방법을 이용한 모바일 단말기는 몇 개의 객체들로 페이지를 재구성 할 때 표현이 더 쉽고 편집과 동일한 단말기 서비스 화면을 얻을 수 있었다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 추계학술대회
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• pp.639-640
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• 2013

이 연구는 DIBR 기반 다시점 중간 영상 생성과정에서 원하는 객체를 좀 더 양질의 영상으로 출력하기 그 객체가 위치한 영역을 찾아내는 방법을 구현하였다. 이 방법은 사용자가 영역을 정해주어야 하는 기존의 GrabCut 방식을 보완하여 영상 처리 작업을 통해 바운딩 박스를 자동으로 찾아내도록 하였다. 그리고 GrabCut 알고리즘을 적용한 후에, 깊이 영상의 히스토그램을 이용해서 전경과 배경을 좀 더 명확하게 분리할 수 있도록 하였다. 이를 통해 기존의 방법에 비해서는 좀 더 나은 결과를 얻을 수 있음을 확인하였다. 본 논문에서는 이러한 방법에 대해서 설명하고, 향후 과제를 논한다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2002년도 춘계종합학술대회
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• pp.201-204
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• 2002

클라이언트에서 검색한 지도를 스크롤할 경우 이미 전송 딴은 객체를 캐슁하여 무선 데이터 전송량을 줄일 수 있지만, 클라이언트 내에서 데이터 좌표 변환, 선택적인 객체 삭제, 압축 단계가 부가적으로 요구된다. 특히 좌표 변환 연산은 모바일 휴대폰의 낮은 계산 능력, 적은 메모리 용량 등과 같은 제한적 자원으로 많은 시간이 요구된다. 따라서 휴대폰 기반 모바일 지도 서비스에서 효과적인 지도 제어 연산을 수행하기 위해서는 휴대폰의 제한적인 자원을 극복함과 동시에 무선 네트웍 대역폭을 줄이는 방안이 연구되어야 한다. 이 논문에서는 클라이언트-서버 시스템에서 이미 전송 딴은 객체의 효율적인 캐슁 기법을 제안하고자 한다. 또 캐슁된 데이터의 재이용과 원시 데이터의 재전송 방법의 장단점에 분석하고자 한다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.466-469
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• 2005

In this study e-map component was designed and developed to possibly overlay with all kinds of thematic maps in various scales and provide the all detailed information by using high-resolution satellite image and GIS. Also, this system has powerful map composition tool to display map such as legend, scale bar, index map and so on. For this, this e-map component was designed by using UML and developed based on Windows 2000 and implemented by using Visual Basic 6.0 as development programming language, Map Objects 2.1 of ESRI as GIS component. Through this system, the forest officials could generate more detailed topography and desired thematic map. In addition, the data consistency in DBMS could be maintained by using SDE (Spatial Database Engine) for their job and share the standard forest database with others in real time.