• 복식문화연구
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• 제16권3호
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• pp.518-532
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• 2008

The purposes of this study were to investigate the relationships between women's self-image and the preference and the wearing frequency of knit-wears, and to examine the characteristics of the design elements that influence the preferred knit-wear images. The subjects were 277 female college students and working women living in metropolitan area of Seoul. The data were analyzed by using descriptive analysis, factor analysis, Cronbach's $\alpha$-reliability coefficient, Pearson's correlation coefficient, and multiple regression analysis. Four dimensions of women's self-images were derived by factor analysis; elegance, conservativeness, individuality, and maturity. Women with conservative self-image preferred simple knit-wears and women with high rate for individuality preferred splendid and sporty knit-wears. Women with elegant self-image disliked sporty knit-wears. Women with conservative self-image preferred white, and those who rated their self-image to be individuality preferred various colors including yellow, blue, green, purple, pink, and sky-blue. Women with mature self-image preferred black and beige. Women with individuality as their self-image preferred jacquard pattern and abstract pattern. There was a higher wearing frequency for all four seasons for women with conservative self-image, and there was higher wearing frequency in the winter for those with elegant self-images. Women who preferred simple knit-wears showed preference for single color with no prints and low chroma color, and those who preferred sporty knit-wears showed preference for elastic materials. Women who preferred neat and elegant knit-wears showed preference for argyle check pattern.

• 한국실내디자인학회논문집
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• 제34호
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• pp.149-156
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• 2002

This study intends to acquire objective models for basic quantitative analysis of pattern and space through image-recognition technique, and verify the effectiveness of such acquired models. Many experiments showed that the recognized result can be varied depending on the different viewpoints and the analysis based on the single-viewpoint images does not provide objectivity. The experiment using multi-viewpoint image models, which was attempted as an alternative for the disadvantages, showed the recognition similar to that of the actual model. Especially, images generated at laboratory using miniature model may be useful in comparing and understanding plural number of patterns. The models that have been acquired using such images may be hard to use in acquiring images for analyzing actual building patterns or indoor space, although they may be useful in pattern analysis using miniature model. The disadvantage, however, can be supplemented with panorama VR and C. G. simulation technique. Steady researches are required on the application of visual information to the image recognition principle and the model for quantitative analysis of pattern and space in addition to the research on the construction of the model that can be used in comparing and analyzing not only form and space but also miniature models.

• Korean Journal of Geomatics
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• 제4권1호
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• pp.1-8
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• 2004

In the middle-resolution remote sensing, the Ground Sampled Distance (GSD) that the detector senses and samples is generally larger than the actual size of the objects (or materials) of interest, and so several objects are embedded in a single pixel. In this case, as it is impossible to detect these objects by the conventional spatial-based image processing techniques, it has to be carried out at sub-pixel level through spectral properties. In this paper, we explain the sub-pixel analysis algorithm, also known as the Linear Spectral Mixing (LSM) model, which has been experimented using the Hyperion data. To find Endmembers used as the prior knowledge for LSM model, we applied the concept of the convex geometry on the two-dimensional scatter plot. The Atmospheric Correction and Minimum Noise Fraction techniques are presented for the pre-processing of Hyperion data. As LSM model is the simplest approach in sub-pixel analysis, the results of our experiment is not good. But we intend to say that the sub-pixel analysis shows much more information in comparison with the image classification.

• 디지털산업정보학회논문지
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• 제15권1호
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• pp.99-107
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• 2019

Retinex-based image enhancement is a technique that utilizes the property that the human visual characteristics are sensitive to the difference from the surrounding pixel value rather than the pixel value itself. These Retinex-based algorithms show different characteristics of the improved image depending on the applied color space or gamma correction. In this paper, we set eight different experimental conditions according to the application of color space and gamma correction, and analyze the objective and subjective performance of each Retinex based image enhancement algorithm and apply it to the implementation of Retinex based algorithm. In the case of gamma correction, quantitative low entropy images and low contrast images are obtained. The application of Retinex technique in HSI color space rather than RGB color space is found to be high in overall subjective image quality as well as maintaining color.

• 반도체디스플레이기술학회지
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• 제12권2호
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• pp.27-32
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• 2013

Shape From Focus (SFF) is a passive optical technique to recover 3D structure of an object that utilizes focus information from 2D images of the object taken at different focus levels. Mostly, SFF methods use a single focus measure to compute image focus quality of each pixel in the image sequence. However, it is difficult to recover accurate 3D shape using a single focus measure, as different focus measures perform differently in diverse conditions. In this paper, a nonlinear Total Variation (TV) based approach is proposed for 3D shape recovery. To improve the result of surface reconstruction, several initial depth maps are obtained using different focus measures and the resultant 3D shape is obtained by diffusing them through TV. The proposed method is tested and evaluated by using image sequences of synthetic and real objects. The results and comparative analysis demonstrate the effectiveness of our method.

• Structural Engineering and Mechanics
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• 제69권4호
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• pp.467-477
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• 2019

Digital image correlation (DIC) is now a popular and extensively used full-field metrology technique. In general, DIC is performed by using a turnkey solution offered by various manufacturers of DIC. In this paper, a simple and economical set-up for DIC is proposed which uses easily accessible digital single-lens reflex (DSLR) camera rather than industrial couple-charged device (CCD) cameras. The paper gives a description of aspects of carrying a DIC experiment which includes experimental set-up, specimen preparation, image acquisition and analysis. The details provided here will be helpful to carry DIC experiments without specialized DIC testing rig. To validate the responses obtained from proposed DIC set-up, tension and fatigue tests on specimens made of IS 2062 Gr. E300 steel are determined. Tensile parameters for a flat specimen and stress intensity factor for an eccentrically-loaded single edge notch tension specimen are evaluated from results of DIC experiment. Results obtained from proposed DIC experiments are compared with those obtained from conventional methods and are found to be in close agreement. It is also noted that the high resolution of DSLR allows the use of proposed approach for fracture characterization which could not be carried out with a typical turnkey DIC solution employing a camera of 2MP resolution.

• 한국조경학회지
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• 제33권3호
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• pp.18-30
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• 2005

Since the 1990s, with the beginning of local autonomy, most Korean cities have tried to establish and reinforce their own identity. The Law on the Planning and the Use of National Land, which took effect in January 2003, requires major and minor cities to manage and develop a city image and a marketing strategy to reflect their current condition. However, many cities continue to experience confusion in implementing urban landscape planning because no efficient and systematic method has been provided for the analysis of a city's image. The absence of systematic analysis methods makes it difficult not only to assess the current condition of a city accurately but also to choose an appropriate policy for the given city. Consequently, many cities suffer excessive trials and errors in implementing the correct policies for their city. The purpose of this study was to analyze the image: of Kongju, which has many historical properties. For this purpose, adjective questionnaires and multi-dimensional scaling (MDS) were made use of in order to assess the city image. The results of this study can be summarized as follows: 1. There are five properties that serve as landmarts lie symbolize Kongju: Muryeong royal tomb, Castle Kong, Mt. Gyeoiryong, Forest Museum, and Kongju National Museum. 2. Based on the citizen survey regarding the city type, Kongju is seen as a historical and an educational city. 3. Based on the image positioning (image spatial plot), Kongju is described as an old and familiar city. There we, however, no landmarks which are in accord with the image of Kongju. It is difficult to establish and reinforce the image of a city with a single element like a landmark However, with steady follow-up research, this study may serve as a systematic and logical model to improve the urban landscape and image.

• 한국전자파학회논문지
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• 제29권7호
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• pp.523-531
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• 2018

본 논문에서는 항공기 기반 단일채널 FMCW-SAR(frequency modulated continuous wave - synthetic aperture radar) 복원영상 내 이동물체 분석을 위해 합성개구레이다의 모호성 함수(SAR ambiguity function)를 이용한 상대속도 분석기법에 대해 설명한다. 안테나와 이동물체 간의 상대속도 변화를 분석하기 위해서 FMCW 신호모델 기반 정지 이동물체 간 신호변환특성을 분석하고, 이동물체의 변환특성을 고려한 모호성 함수를 모의실험하였다. 복원영상 내 이동물체의 상대속도 변화는 도식화된 모호성 함수의 최고점으로부터 추정될 수 있으며, 상대속도의 변화가 클수록 정지 이동물체 구분이 가능하게 된다. 이를 실제 항공기 기반 관측 자료로부터 복원된 FMCW-SAR 영상에 적용하여 모호성 함수를 이용한 이동물체 식별과 상대속도 분석결과를 관측지역 내 실험조건과 비교분석하였다.

• 대한전자공학회논문지SP
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• 제46권4호
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• pp.148-156
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• 2009

본 논문에서는 I/Q 부정합에 의한 단일 주파수 연속파 학습신호 왜곡을 새롭게 해석하고 이를 이용한 영상 제거 방법을 제안한다. 기존의 방법에서는 위상 부정합과 이득 부정합을 각각 예측하고 보상하는 방법을 사용하였다. 본 논문에서는 I/Q 부정합에 의하여 단일 주파수 연속파 학습신호의 원형 궤도가 타원 궤도로 왜곡됨을 증명한다. 이를 바탕으로 2단계로 이루어진 I/Q 부정합 보상 방법을 제안한다. 제안한 방법의 첫 번째 신호처리에서는 수신 신호의 위상을 회전하여 타원 궤도의 장축이 x축과 일치하도록 한다. 두 번째 신호처리에서는 첫 번째 신호처리를 거친 Q 경로 신호를 증폭하여 원형 궤도가 되도록 하여 I/Q 부정합을 보상하고 영상 신호를 제거한다. 모의실험을 통해서 직교 위상 편이 변조 (QPSK), 16-직교 진폭 변조 (QAM), 64-직교 진폭 변조 신호에 대해서 70dB 이상의 영상 제거 성능을 가지고 있음을 보인다. 한편, 제안한 방법이 우수함을 보이기 위하여 레일레이 페이딩 경로 환경에서 성능 분석을 한다. 비트오율 (BER) 모의실험을 통해서 제안한 방법은 직교 위상편이 변조, 16-직교 진폭 변조, 64-직교 진폭 변조 등의 다양한 변조에 대해서 부가백색가우시안잡음 (AWGN) 뿐 만 아니라 페이딩 경로에서도 영상 신호가 없는 이상적인 수신기의 비트오율과 거의 일치함을 보인다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2013년도 추계학술대회
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• pp.3-5
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• 2013

We proposed a method for increasing visibility of dehazed images by enhancing luminance component of dehazed image. For this purpose, we analyze shape of luminance histogram in multi bunches and observe that increasing visibility those bunches does not bear over contrast enhancement. From the analysis and observation, histogram equalization intends to increase visibility of each bunch with less computation.