• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2007년도 추계종합학술대회
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• pp.281-284
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• 2007

A realization for image distortion correction processing system with DSP processor is presented in this paper. The image distortion correcting algorithm is realized by DSP processor for focusing on more real time processing than image quality. The lens and camera distortion coefficients are processed by YCbCr Lookup Tables and the correcting algorithm is applied to reverse mapping method for geometrical transform. The system experimentation results in the processing time about 34.6 msec on $720{\times}480$ curved image at 150 degree visual range.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1996년도 추계학술대회 논문집
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• pp.490-495
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• 1996

Though the increment of using computer vision system in modern industry, there are lots of difficulties to measure precisely because of measurement error distortion phenomenon. Among these reasons, the distortion of edge is dominant reason which is occurred by the blurred image. The blurred image is happened when camera can not discriminate its precise focus. To calibrate and generalize distortion phenomenon is important. Thus, we must fix the discrimination criteria which is collected by image recognition of precise focus. Also, radial distortion causes an inward or outward displacement of a given image point from its ideal location. This type of distortion is mainly caused by flawed radial curvature curve of the elements. Thus, we were analyzed the distortion in terms of the changed with lens magnification.

• 센서학회지
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• 제30권4호
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• pp.223-228
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• 2021

This work presents a low-power CMOS image sensor (CIS) with a multi-column-parallel (MCP) readout structure while focusing on improving its performance compared to previous works. A delta readout scheme that utilizes the image characteristics is optimized for the MCP readout structure. By simply alternating the MCP readout direction for each row selection, additional memory for the row-to-row delta readout is not required, resulting in a reduced area of occupation compared to the previous work. In addition, the bias current of a pre-amplifier in a successive approximate register (SAR) analog-to-digital converter (ADC) changes according to the operating period to improve the power efficiency. The prototype CIS chip was fabricated using a 0.18-㎛ CMOS process. A 160 × 120 pixel array with 4.4 ㎛ pitch was implemented with a 10-bit SAR ADC. The prototype CIS demonstrated a frame rate of 120 fps with a total power consumption of 1.92 mW.

• 한국산학기술학회논문지
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• 제15권6호
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• pp.3599-3608
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• 2014

본 논문은 사고유발기능을 중심으로 이미지의 인지적 기능에 대해 탐색적으로 고찰해보고자 하였다. 이미지의 사고유발기능이 실제 사례에서 구체적으로 어떻게 나타나는지를 알아보기 위해 꼴라쥬 미술작업을 실시하였다, 그 후 심층면접을 통해 이미지의 사고유발기능을 중심으로 이미지에 대한 연구 참여자들의 인지과정을 분석하였다. 그 결과 이미지는 대상에 주의를 기울여 더욱 면밀히 처리하도록 하고, 몰입을 증가시켜 사고를 유발하며 이를 통해 대화를 활성화하는 것으로 나타났다. 이미지의 인지적 기능에 대한 본 연구는 우리 인간 인지에 대한 이해의 폭을 확장하는데 기여할 것으로 기대되고, 특히 과학과 예술의 융합에도 유익한 통찰을 제공할 수 있을 것으로 기대된다.

• 동아시아경상학회지
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• 제6권4호
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• pp.25-34
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• 2018

Purpose - The purpose of this study is to investigate the effect of Korean Wave on consumer intentions by adjusting the Korean image and image of Korean company to counterbalance the hostility through the control effect of Korean Wave. Research design and methodology - This paper measure individual and national hostility and suggest that the effect of the adjustment of Korean culture satisfaction on corporate image, product image and consumer's purchase intention. Results - This study suggests the subjects to be studied empirically by presenting research themes and models, but it is necessary to verify the model through statistical verification since it is not verified empirically. In addition, it is necessary to further control factors and identification of anti-marginal or anti-marginal products. Conclusions - This study suggests research topics that investigate how hostility affects Korean Wave in consideration of the current special situation, while conventional researches mainly focus on ethnocentrism and patriotism. In this way, this study suggests research direction that helps to enhance corporate image and product image by eliminating hostility and actively utilizing Korean Wave. The Proposal will be helpful to provide a frame for empirical analysis in future and to develop strategic means to further utilize it in international marketing.

• 대한의용생체공학회:의공학회지
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• 제28권6호
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• pp.798-802
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• 2007

The synthetic focusing in the ultrasonic imaging systems has been formed in the way that one element transmits a circular wave and receives an echo signal. The amplitude of the signal transmitted from one element is too small to propagate a long distance so that the SNR(Signal to Noise Ratio) is very low in an image obtained by the synthetic focusing. To solve this problem, a defocusing method which uses several elements has been proposed. In this method, the SNR is improved due to using several elements to transmit the circular wave. But if the number of transmitting elements increases, the phase distortion is severe in the defocusing method. In this paper, we propose a new method that can generate a circular wave using a lot of elements without phase distortion. At first, we generate limited plane waves with different propagation angles and then superpose them to make a circular wave. We show that the circular wave can be used to improve SNR in the real-time 3D ultrasonic imaging as well as the synthetic focusing through computer simulation and experiments.

• 한국정보통신학회논문지
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• 제13권12호
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• pp.2547-2554
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• 2009

본 논문은 얼굴을 자동 초점(AF, Auto Focusing) 기능의 관심영역(ROI, Region of Interest)으로 이용하기 위한 얼굴 검출(Face Detection) 알고리즘 및 하드웨어 구현에 관한 것이다. 얼굴 검출을 위해 YCbCr 색 좌표계에서의 피부색 영역을 바탕으로 얼굴의 특징을 이용하였다. 얼굴에 해당하는 피부, 눈에 해당하는 에지, 그리고 입에 해당하는 음영의 픽셀수를 얼굴 특징으로 선택하였고, 얼굴 특징은 2,000개의 얼굴 샘플을 통하여 통계적으로 구하였다. 제안된 알고리즘은 하드웨어 설계 시, 하드웨어 자원의 효율성을 고려하여 영상의 중심에 가까운 두 명의 얼굴을 검출하게 하였다. 그리고 검출된 얼굴을 자동 초점의 관심 영역으로 이용하기 위하여 얼굴 영역을 사각형의 박스로 표시하였고, 영상에서 박스의 시작점과 끝점에 해당하는 위치를 출력하게 하였다. 하드웨어로 설계된 얼굴 검출 기능은 FPGA 보드와 모바일 폰 카메라 센서를 사용하여 검증하였다.

• 패션비즈니스
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• 제13권1호
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• pp.1-16
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• 2009

The purpose of this study was to evaluate the clothing image of the Daks and Superior golf wear, and to compare the perceiver's image perception with clothing image in fashion industry, and to find out the differences of image perception between the buying groups and non-buying groups of the Daks and Superior golf wear, for developing the possibility and strategy of the golf wear market for the apparel marketers and manufacturers. In this study, the data obtained from 193 respondents were analyzed by the descriptive statistics, average analysis. The results from the data were as follows : The questionnaire of the image evaluation rated on 7 point Likert-type scales in the 17 features were evaluated by perceivers. The clothing images by 103 respondents(Daks group) were not in accord with the clothing images expressed on homepage of the Daks golf wear. In the other hands, the clothing images by the 90 respondents(Superior group) were in accord with the clothing images expressed on homepage of the golf wear. There were significant differences in evaluating the clothing images between the buying groups and non-buying groups of the Daks and Superior golf wear. The buying groups of the Daks and Superior golf wear perceived the clothing image of the Daks and Superior golf wear more dynamic, positive than the non-buying groups.

• Asia pacific journal of information systems
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• 제26권2호
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• pp.247-262
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• 2016

Almost all Koreans recognize the Dolhareubang as a representative symbol of Jeju. However, as the development of online technology progressed, the image and perception of the Dolhareubang is also expected to change. Thus, this study explored the perceived images of Dolhareubang by focusing on residents in Seoul, Korea using Q methodology. The goal of this research was to evaluate this iconic representation of Jeju as an important component of the island's online tourism destination image. The Q-set was developed from existing literature and defined conceptually in terms of 'value', 'resource', 'story', and 'image'. Thirty five respondents were recruited as P set. Findings indicated four distinctive clusters that perceived the Dolhareubang differently and differences in perceptions were observed in terms of age. The examination of destination image and the exploration of the perceptions of Dolharuebang as a representative of Jeju could contribute to online destination image management or development, which is a crucial component of smart tourism.

• 복식문화연구
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• 제5권4호
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• pp.80-88
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• 1997

The purpose of this study was to identify the denotating of visual message and linguistic message in the advertisement of Jean-wear, and to identify the image type in the advertisement of Jean-wear. Content analysis was done using the advertisement of Jean-wear from several fashion magazines which were published from January, 1996 to August, 1997. The advertisement of Jean-wear reflects the reality using the photos, and is image appeal type, appeals to the model\`s lifestyle, the western value. And that mostly singles person was appeared in the advertisement means solitude in modern society.