• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(4)
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• pp.227-230
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• 2002

In this paper, we propose an algorithm to decode Data Matrix two dimensional barcode symbology. We employ hough transform and bilinear image warping to extract the barcode region from the image scanned using a CMOS digital camera. The location of barcode can be found by applying Hough transform. However, barcode image should be warped due to the nonlinearity of lens and the viewing angle of camera. In this paper, bilinear warping transform is adopted to wa게 and align the barcode region of the scanned image. Codeword can be detected from the aligned barcode region.

• 방송공학회논문지
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• 제21권4호
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• pp.569-577
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• 2016

위치 기반 서비스(LBS; Location Based Service)를 위한 장소 인식 기술은 사용자 중심의 서비스를 위한 중요 기술 중 하나이다. 이미지 특징을 이용한 장소 인식 방법 중에서 FLANN(Fast Library for performing Approximate Nearest Neighbor)의 이미지 어휘 트리를 이용하면 처리 속도가 빠르지만 가려짐 등으로 인해 인식의 정확도가 높지 않다. 본 논문에서는 SURF(Speeded Up Robust Features)를 사용한 쿼드(quad) 어휘 트리 기반의 장소 인식 방법을 제안한다. 학습 단계에서 데이터베이스 이미지를 세 단계의 공간 피라미드로 표현하고 각 영역에 대한 어휘 트리를 구성한다. 질의 이미지도 세 단계의 공간 피라미드로 표현하고 각 단계별로 어휘 트리 기반 인식을 수행한다. 또한 매칭된 특징 간의 호모그래피(homography) 관계를 측정하고 이를 만족하는 영역의 개수를 고려함으로써 최종 인식의 성능을 향상시켰다.

• 로봇학회논문지
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• 제12권3호
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• pp.249-257
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• 2017

This paper proposes a method to segment urban scenes semantically based on location prior information. Since major scene elements in urban environments such as roads, buildings, and vehicles are often located at specific locations, using the location prior information of these elements can improve the segmentation performance. The location priors are defined in special 2D coordinates, referred to as road-normal coordinates, which are perpendicular to the orientation of the road. With the help of depth information to each element, all the possible pixels in the image are projected into these coordinates and the learned prior information is applied to those pixels. The proposed location prior can be modeled by defining a unary potential of a conditional random field (CRF) as a sum of two sub-potentials: an appearance feature-based potential and a location potential. The proposed method was validated using publicly available KITTI dataset, which has urban images and corresponding 3D depth measurements.

• 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.

• 디자인학연구
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• 제19권6호
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• pp.15-20
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• 2006

SKM 면세점은 서울 강남구 삼성동에 위치하여 훌륭한 지리적 조건과 유리한 주변환경, 넓은 매장 등 여러가지 장점을 지녔음에도 불구하고 [그림 2]의 'SKM Dutyfree' 구 심볼은 낮은 브랜드 인지도와 위치정보의 비효율적 전달이 가장 큰 문제로 드러났다. 이에 첫째, 면세점브랜드 'SKM Dutyfree'를 상대적으로 브랜드 인지도가 높은 'COEX'의 사용허가를 취득하여 'COEX Dutyfree'로 브랜드 네임을 변경하였으며 둘째, 도시적 이미지와 위치정보의 효율적 전달을 위한 시각적 이미지를 개발하였다. 따라서 비주얼 아이덴티티 디자인의 컨셉은 첫째, 기존 COEX의 이미지와 도시 구조물 이미지 전달. 둘째, 코엑스몰 호텔 백화점 전시장 공항터미널 등을 아우르는 국제적이고 도시적인 이미지와 위치정보의 조합. 셋째, 타 면세점 보다 젊고 다이나믹한 이미지 전달을 목표로 하여 [그림 1]의 새로운 아이덴티티디자인으로 개발되었다.

• 동아시아경상학회지
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• 제8권1호
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• pp.71-80
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• 2020

Purpose - The purpose of this paper is to advance the understanding of the relationship between host country image and cultural intelligence (CQ) on the attractiveness of expatriate destinations. Specifically, this study compares the different impacts of CQ on the relationship between host country image and subsidiary attractiveness by comparing a US-based subsidiary and a Vietnam-based one. Research design and methodology - A total of 445 Korean full-time workers responded through an online survey. The survey randomly showed the participants one of two conditions for a potential expatriate location. The participants were asked to answer a series of questions on the organizational attractiveness of the subsidiaries from the perspective of an expatriate candidate and respond to a series of questions on individual CQ. Results - Through a two-way ANOVA test, the results reveal that Korean expatriate candidates perceive that a Vietnam-based subsidiary is a less attractive destination for international assignment when compared to a US-based subsidiary. In addition, the positive moderating effect of cultural intelligence on the relationship between the host location and the subsidiary's attractiveness is stronger when Vietnam, rather than the US, is the assignment location. Conclusions - Drawing upon AUM theory, this study confirmed that unfavorable country image affects subsidiaries' attractiveness for expatriate candidates, due to anxiety. However, this study showed the role of employees' CQ to mitigate these challenges. This study suggests providing information on positive conditions of expatriate locations and building systematic process for enhancing individual CQ for organizations.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.1211-1212
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• 2008

In this paper, we propose image process modeling as a part of location based surveillance system for unauthorized target recognition and tracking in harbor, airport, military zone. For this, we compress and store background image in lower resolution and perform object extraction and motion tracking by using sobel edge detection and difference picture method between real images and a background image. In addition to, we use Independent Component Analysis Neural Network for moving target recognition. Experiments are performed for object extraction and tracking of moving targets on road by using static camera in 20m height building and it shows the robust results.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 추계학술대회 논문집
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• pp.500-503
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• 1997

In this paper, a method for recognizing 3-D objects using the 3-D Hough transform and the robust stereo vision is studied. A 3-D object is recognized through two steps; modeling step and matching step. In modeling step, features of the object are extracted by analyzing the IGES file. In matching step, the values of the sensed image are compared with those of the IGES file which is assumed to location and orientation in the 3-D Hough transform domain. Since we use the 3-D Hough transform domain of the input image directly, the sensitivity to the noise and the high computational complexity could be significantly allcv~ated. Also, the cost efficiency is improved using the robust stereo vision for obtaining depth map image which is needed for 3-D Hough transform. In order lo verify the proposed method, real telephone model is recognized. Thc results of the location and orientation of the model are presented.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2003년도 봄 학술발표회 논문집
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• pp.471-476
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• 2003

The presence of voids under pavements or behind tunnel linings results in their deterioration. To detect these voids effectively by non-destructive tests, a method using radar was proposed. In this research, not only the detection of shape of voids, but also the location of reinforcing bars by radar image analysis is investigated. The experiments and image processing were conducted to detect voids and to locate reinforcing bars in or under concrete pavements (or tunnel linings) with reinforcing bars. From the results, the fundamental algorithm for tracing the reinforcing bars and voids, improving the horizontal resolution of the object image and detecting shape of objects, was verified.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1998년도 추계학술대회
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• pp.269-270
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• 1998

Image-guided surgery (IGS) system has become well known in the field of neurosurgery and spine surgery. A patient's anatomy is first registered to preoperatively acquired CT/ MRI data using the point matching algorithm. A magnetic field digitizer was used to measure the physical space data and the system was based on Workstation of Unix system. To evaluate the spatial accuracy of interactive IGS system, the phantom consisting of rods varied height and known location was used. The RMS error value between CT/MR images and real location was 3-4mm. For the more convenience of the surgery, we provide various image display modules.