• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1994년도 춘계공동학술대회논문집; 창원대학교; 08월 09일 Apr. 1994
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• pp.42-48
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• 1994

This paper presents the navigation method for a mobile robot which uses a single camera and fluorescent lamp as a guide mark, projected on a convex mirror. The current position and heading direction of the mobile robot are obtained from the image of the guide mark. While the mobile robot travels to a goal position, the current position and heading direction of the mobile robot are updated continuously and the desired path and actual moving path are displayed on the monitor screen in real time. This proposed method eliminates the need to rotate the camera to track the guide mark, since a panoramic view of the surrounding area is available from the convex mirror, and natural guide marks such as usual florescent lamp on the ceiling or door frame can be used for navigation.

• 융합신호처리학회논문지
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• 제13권4호
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• pp.187-193
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• 2012

An image authentication scheme for gray scale image through embedding a digital watermark by quantization of Integer Wavelet Transform (IWT) coefficients of the image is proposed in this paper. Proposed method is designed to detect modification of an image and to identify tampered location of the image. To embed the watermark mid-frequency band of a second level IWT was used. An approximation of the original image based on LL band was stored in LSB bits of the pixel data as a recovery mark for restoration of the image. Watermarked image has achieved a good PSNR of 40 dB compared to original cover image. Restored image quality was also very good with a PSNR of more than 35 dB compared to unmodified watermarked image even when 25% of the received image is cropped. Thus, the proposed method ensures a proper balance between the fidelity of the watermarked image and the quality of the restored image.

• 기본간호학회지
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• 제8권2호
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• pp.160-171
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• 2001

Purpose: The purpose of study was to identify the relationship between body image and self-esteem in patients with chronic renal failure. Method The subjects of study were 97 patients with chronic renal failure who were outpatients at K medical center. B hospital, H hospital in Busan. Data were collected from Nov 15th to Dec. 17th, 1999. The instruments used for study were the Body Cathexis Scale and Rogenberg's Self-esteem Scale. Collected data were analyzed by frequency, percentage, mean, standard deviation, t-test, ANOVA, Scheffe test, and Pearson's correlation coefficients. Result: 1 The mean score for body image was $137.46{\pm}22.21$, the mean mark $2.92{\pm}0.47$, and the mean score of self-esteem was $30.80{\pm}8.76$, the mean mark $3.08{\pm}0.87$. 2. There was a significant difference in the score for body image according to educational level (F=5.189, P=.002) and type of residence (F=6.095. P=.001). 3. There was a significant difference in the score for self-esteem according to age (F=3.615, P=.009), educational level (F= 4.772, P=.004), marital status (F=3.498 P=.019) and presence of children (F=2.511, P=.014). 4. Body image in patients with chronic renal failure patients showed significant correlation with self-esteem (r=.519, P=.000). Conclusion: From this study, a relationship between body image and self-esteem in patients with chronic renal failure was identified. Therefore, nursing interventions are needed to promote body image and self esteem in patients with chronic renal patients.

• 대한공간정보학회지
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• 제10권3호
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• pp.79-87
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• 2002

항공사진에 포함된 사진 지표의 방사 및 기하 특성을 이용하여 지표의 중심 위치를 자동으로 인식하기 위한 접근 방법을 제안한다. 방사 특성에 기반을 둔 전략에 근거하여, 입력된 영상을 이진화한 다음 형태 연산자를 적용시켜 사진 지표가 있는 후보 영역을 추출한다. 기하 특성에 기반을 둔 전략에 근거하여 ${\bigtriangledown}^G$ 필터링과 대칭성 강조 필터링을 적용시킨 후, 대칭이 가장 강하게 나타나는 위치인 지표의 중심 위치를 구한다. 사진 지표를 포함하고 있는 66매의 영상에 대한 평가 결과 중심 위치가 수동으로 관측한 결과와 비교할 때 1 화소 정도의 차이로 얻어질 수 있었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 심포지엄 논문집 정보 및 제어부문
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• pp.284-296
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• 2005

Bridge displacement measurement system using image processing is developed to overcome the contact type system inefficiencies such as heavy, expensive property and temporary construction necessity. The system is composed of tablet PC with IEEE1394 digital camera, telescope lens and a designed target mark. The key is projection algorithm where all pixels are added up for each row(column) to find out the center line. The experimental results are shown compared with a contact type system.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(2)
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• pp.87-90
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• 2002

A digital watermark is an invisible mark embedded in a digital image which used for copyright protection. In this paper, we propose a new optical watermarking system. A optical watermarking system is applied for digital watermarking by phase hologram and Mach-Zehnder interferometer. A optical watermarking technique to be hidden is phase modulated in a random patten, and its Fourier-transformed hologram image is superposed on a content image. The autentication information extract by using Mach-zehnder interferometer.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1990년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 26-27 Oct. 1990
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• pp.716-721
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• 1990

It is one of the essential task to determine the absolute location of mobile robot during its navigation. In this paper we propose an algorithm to calculate the distance and orientation of camera from landmark through the visual image of stripe typed landmark. Exact closed form solution of camera location is obtained with the correspondences from vertical line on mark plane to the intersection point of projected line with horizontal axis of image plane. It needs only one line image information, so that location determination can be processed in real time.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(4)
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• pp.243-246
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• 2002

The proliferation of digitized media(audio, image and video) is creating a processing need for copyright enforcement schemes that protect copyright ownership. we argue that a watermark must be placed in perceptually significant components of a signal if it is to be robust to signal distortions and malicious attack. In this paper, RGB coordinate image is transformed into LUV coordinate, it include the characteristics of, Human vision and then the UV component is transformed into NxN block DCT transform. we propose a technique for embedding the watermark of visually recognizable mark into the middle frequency domain of image.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(1)
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• pp.227-230
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• 2002

A digital watermark is an invisible mark embedded in a digital image which used for copyright protection. In this paper, we propose a new optical watermarking system. A optical watermarking system is applied for digital watermarking by phase hologram and Mach-Zehnder interferometer. A optical watermarking technique to be hidden is phase modulated in a random patten, and its Fourier-transformed hologram image is superposed on a content image. The autentication information extract by using Mach-zehnder interferometer.

• 디자인학연구
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• 제18권1호
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• pp.5-16
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• 2005

본 연구는 방대한 기호학 학문과 영역 탓에 이해하기 어렵고 또한 명확하지 않은 기호학 분야의 연구에서 찰스 샌더스 퍼스(Charles Sanders Peirce)의 기호학을 명확히 이해하고, 그의 기호학적인 연구의 업적을 아이덴티티 디자인 분야에 활용 할 수 있도록 연구 결과를 제시하고자 한다. 이를 위해서 연구는 기존의 기호학과 관련된 디자인관련 논문들을 재 고찰하고, 퍼스의 삼원적 기호학에 대한 진의와 범주에 대한 이해를 통해서 기업의 심볼마크를 설명하였다. 이 결과를 통해서 다음과 같은 결과를 얻을 수 있었다. 1) 심볼마크는 관습적으로 한 제품, 서비스, 기업 자체를 의미하며 따라서 표현체적인 측면에서는 법칙 기호이다. 2) 심볼마크는 하나의 기호로서 대상체를 상징하므로 대상체의 세범주적 구분에 의해서 상징 기호이다. 3) 퍼스의 기호학적 정의에서 볼 때, 기업의 심볼마크는 사회적인 규칙을 통해서 존재하므로, 이는 논항 기호로 이해가 되어야만 한다. 4) 기업의 심볼마크는 과거부터 기업 혹은 조직들이 사용해 온 것이고, 대중들은 이를 어느 정도 인식하고 있다. 따라서 기업이 자신의 제품에 심볼마크를 부착하고 대중에게 표상체로서 심볼마크를 보이는 것은 개별적이고 구체적인 사실, 즉 있는 그대로의 사실로서 작용한다. 따라서 심볼마크는 해석체적인 측면의 발화 지시적인 개별기호이다. 퍼어스의 기호학적인 측면에서의 심볼마크의 분류와 이해는 기호의 다양한 상호관계와 연계를 가지는 범주의 법칙과 여러 유형에 대한 이해를 단지 조형적인 측면에서의 구분이 아닌 개념적으로 또한 포괄적인 이해를 요구한다.