• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(4)
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• pp.359-362
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• 2002

In this paper, we propose a new feature-based text watermarking for the binary text image. The structure of specific characters from preprocessed text image are modified to embed watermark. Watermark message are embedded and detected by the following method; Hole line disconnect using the connectivity of the character containing a hole, Center line shift using the hole area and Differential encoding using difference of flippable score points. Experimental results show that the proposed method is robust to rotation and scaling distortion.

• 한국보육학회지
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• 제18권3호
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• pp.105-121
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• 2018

본 연구의 목적은 의미변별법을 사용하여, 예비유아 교사들이 인식하고 있는 유아교사로서의 자아상이 어떠한지 학년에 따른 자아상에 변화가 있는지를 탐색하여 교사양성 프로그램 개발을 위한 기초자료를 제공하는 것이다. 연구대상은 전남지역에 소재한 4년제 대학 유아교육학과 1~4학년 재학생 167명이었다. 분석결과, 예비교사들의 교사로서의 자아상은 대체적으로 긍정적으로 나타났으며, 다변량분석 결과, 학년에 따라 유아교사상의 하위요인 중 <교사태도>, <교사자질>의 조합된 평균에 차이가 있었다. 또한 교사양성과정을 통해 유아교사상이 긍정적인 방향으로 변화함을 알 수 있었다. 반면, <사회적 평가>요인은 다른 요인에 비해 일관되게 상대적으로 부정적으로 인식하고 있고, 학년에 따른 변화도 유의미하지 않은 것으로 나타났다. 따라서 유아교사의 사회 경제적 측면에서의 이미지 제고를 위해 전문가들의 더 많은 관심과 노력이 요구될 것으로 보인다.

• 전자공학회논문지T
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• 제36T권3호
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• pp.26-31
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• 1999

이 논문에서는 영상통신을 위한 객체 분할 알고리즘과 지식기반 얼굴 특징 검출 알고리즘을 제안한다. 이를 위해 일정한 조도 상태에서 비디오 카메라로부터 동일거리에서 256×256 크기의 그레이 스케일 256 레벨로 두장의 영상을 취득한 후 가우시안 필터를 이용하여 영상 내에 존재하는 잡음을 제거한다. 취득된 두 입력영상은 비디오가 가리키고 있는 배경영상과 배경영상 내에 사람이 포함된 경우의 영상이다. 그리고 배경 영상과 얼굴이 포함된 입력 영상의 차를 구한다. 다음으로 차영상에 대해 축소와 팽창 과정을 통해 얼굴영역 내의 잡음을 제거한 후 좌, 우에서 픽셀 값을 조사하여 마스크를 생성한다. 그리고 마스크를 얼굴이 존재하는 원 영상에 투영하여 배경에서 얼굴영역을 분할한 후 얼굴영역의 에지성분을 조사하여 눈, 코, 귀, 입을 분할한다 시뮬레이션 결과를 통하여 제안된 알고리즘의 효율성을 입증한다.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2004년도 춘계학술발표회논문집
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• pp.275-278
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• 2004

The geo-referencing of satellite imagery is a key task in remote sensing. GCPs are points the position of which is known both in the image and in the supporting maps. Mapping function makes the determination of map coordinates of all image pixels possible. Generally manual operations are done to identify image points corresponding to the points on a digital topographic map. In order to accurately measure ground coordinates of GCPs, differential global positioning system (DGPS) surveying are used. To acquire the sufficient number of well distributed GCPs is one of the most time-consuming and cost-consuming tasks. This paper describes the procedure of automatically extracting GCOs using GCP database. GCP image chips and image matching technique are used for automatic extraction of GCPs. We developed image processing tool for making image chip GCPs and Web Server for management of GCPs.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 학술대회지
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• pp.867-871
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• 2004

In this paper, a new analytic approach for shape preserving contrast enhancement is presented. Contrast enhancement is achieved by means of segmental histogram stretching modification which preserves the given image shape, not distorting the original shape. After global stretching, the image is partitioned into several level-sets according to threshold condition. The image information of each level-set is represented as typical value based on grouped differential values. The basic property is modified into common local schemes, thereby introducing the enhanced effect through extreme discrimination between subsets. The scheme is based on stretching the histogram of subsets in which the intensity gray levels between connected pixels are approximately same In spite of histogram widening, stretched by local image information, it neither creates nor destroys the original image, thereby preserving image shape and enhancing the contrast. By designing local histogram stretching operations, we can preserve the original shape of level-sets of the image, and also enhance the global intensity. Thus it can hold the main properties of both global and local image schemes, which leads to versatile applications in the field of digital epigraphy.

• 한국의류학회지
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• 제24권3호
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• pp.313-322
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• 2000

The purpose of this study was to investigate the characteristic and image of oriental costume designs which represented among three countries, Korea, China and Japan. The specific objectives were: 1) to find out the positioning of oriental costume design. 2) to find out relation to oriental costume image and preference. The stimulus were 75 costume designs of contemporary costume which represented the traditional images of three countries Korea, China and Japan. The main survey of questionary consisted of their evaluation of the oriental costume image by 26 semantic differential bi-polar scales and the subjects were 99 female students majoring in clothing and textile. The data were analyzed by Multidimensional Scaling Method and Regression Analysis. The specific objective were as follows: 1. According to image positioning. The oriental costume design was classified by simple-decorative, soft-hard. 2. As result of regression analysis. The preference of oriental costume image was related to attractive factor.

• 한국정보과학회논문지:소프트웨어및응용
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• 제26권1호
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• pp.150-150
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• 1999

In this paper, a content-based image retrieval scheme based on scale-space theory is proposed. The existing methods using scale-space theory consider all scales for image retrieval,thereby requiring a lot of computation. To overcome this problem, the proposed algorithm utilizes amodified histogram intersection method to select candidate images from database. The relative scalebetween a query image and a candidate image is calculated by the ratio of histograms. Feature pointsare extracted from the candidates using a corner detection algorithm. The feature vector for eachfeature point is composed of RGB color components and differential invariants. For computing thesimilarity between a query image and a candidate image, the euclidean distance measure is used. Theproposed image retrieval method has been applied to various images and the performance improvementover the existing methods has been verified.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2008년도 춘계학술발표대회 논문집
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• pp.139-143
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• 2008

The brand power is getting more important in apartment market so that consumers are accustomed to ask first what the apartment brand is when they are considering to buy an apartment. Even so the brand name is the first factor which approaches to the consumer, message and image can be delivered to customers by visual factors. Since visual image can be effective to remind of customers brand image, construction business company should make portfolio to synthesize brand Image actively. This research investigate images of consistency in extenor and interior design according to the apartments brand. Used lexical meaning of the adjective used to discern standard to extract images, selected survey, and evaluated by step 1 to 5 using semantic differential method, SD. The collected cases are analyzed by using statistics software SPSS for windows release 11.0. This research provides conveyance of the vision image which fits to the brand Image and further design direction.

• 한국컴퓨터정보학회논문지
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• 제20권7호
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• pp.17-24
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• 2015

In this paper, we propose a method to solve ghosting problem. To generate adaptive background, using an exponentially decreasing number of frames, may improve object detection performance. To extract moving objects from the background by using a differential image, detection error may be caused by object rotations or environmental changes. A ghosting problem can be issue-driven when there are outdoor environmental changes and moving objects. We studied that a differential image by adaptive background may reduce the ghosting problem. In experimental results, we test that our method can solve the ghosting problem.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송∙미디어공학회 2016년도 추계학술대회
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• pp.82-84
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• 2016

We propose a new reliable SVD-based watermarking scheme having high fidelity and strong robustness with no false-positive problem. Each column of the principal component of a watermark image is embedded into singular values of LL, LH, HL and HH sub-bands of cover image with different scale factors. Each scale factor is optimized by trading-off fidelity and robustness using Differential Evolution (DE) algorithm. The proposed scheme improves fidelity and robustness of existing reliable SVD based watermarking schemes without any false-positive problem. Index Terms - watermarking, reliable SVD, DWT, principal component, Differential Evolution.