• 한국컴퓨터정보학회논문지
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• 제19권1호
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• pp.9-21
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• 2014

본 논문에서는 일반 사용자가 카메라로 사진을 촬영할 경우에 시선을 집중시키면서 안정적인 구도의 영상을 얻을 수 있는 자동 구도 제시기법을 제안한다. 일반 사용자는 대부분 사진의 구도에 대한 배경지식이 없이 사진을 촬영하고, 촬영된 사진은 피사체의 위치가 적절하지 않아 전문가들이 촬영한 안정적인 구도의 사진과 대조된다. 따라서 비전문가 사용자들에게 촬영 후 영상을 처리하는 방법이 아닌 촬영 시 안정적인 구도를 자동으로 제시해주는 방법을 제공한다. 제안하는 방법은 Saliency Map, Image Segmentation, 윤곽선 검출 등을 통해 피사체를 분석하고 피사체를 안정적인 구도가 구성될 수 있는 위치에 황금분할 가이드라인과 함께 출력한다. 실험결과를 통해 피사체를 분석하고 윤곽선을 검출하여 사용자에게 자동으로 구도가 제시되는 것을 알 수 있다.

• 펄프종이기술
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• 제40권2호
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• pp.37-42
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• 2008

Defects of corrugated board were limiting factors to the corrugated industry's growth. On-line detecting systems of defects are beneficial to increase profits of the corrugated board companies by reducing base paper consumption, increasing process reliability, and increasing productivity. By replacing naked eye inspection of defects to a defects detecting system, continuous inspection without fatigue may guarantee final products quality. The system was developed, which was consisted of line scan CCD camera, lens, illuminating parts, high speed image processor, software, various input parts, and output parts. First installation location of the system was at before fluting process after base paper unwinding, and surface of liner board was inspected by the system. Second installation location was after fluting process and combining process for liner board. Production loss includes ragged appearance of edge, irregular flute shape, wrong combination of flute, score cracking, defects in base paper, and flute cracking. The production loss was analyzed before and after the system installation at a commercial domestic mill. The production loss ratio was defined as a production loss weight per total production weight. The production loss ratio before the installation was decreased a lot from 1.28%(during 3 months before installation) to 0.76%(during 12 months after the first installation) and to 0.25%(during 6 months after the second installation).

• 한국지리정보학회지
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• 제24권3호
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• pp.32-40
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• 2021

지하정보는 육안으로 확인이 어려워 안전사고가 발생할 경우 큰 사고로 이어질 수 있다. 최근 국토교통부는 「지하안전관리에 관한 특별법」 재정을 통해 지하매설물의 노후화 또는 파손으로 인해 발생하는 안전사고를 줄이고자 한다. GPR은 육안으로 확인이 어려운 지하공간의 정보를 습득하는 기술로 활용이 많아지고 있다. 그러나 GPR의 위치정보는 탐사 중 습득된 GPS 정보와 영상을 확인하여 보정한다. 이 방식은 평균 오차가 2m 정도 발생한다. 따라서 평면오차를 감소시킬 방안으로 LiDAR를 통한 보정법을 제시했다. 또한 제시된 방법을 활용하여 GPR정보를 보정하였다. 그 결과 오차가 최소 7cm에서 최대 40cm 수준으로 감소하는 것을 볼 수 있었다. 향후 수집된 정확도 높은 GPR 정보를 AI 등을 활용하여 신속하게 분석한다면 현재보다 더 빠르게 지하정보를 수집하고 활용하여 안전을 확보할 수 있을 것이다.

• 한국정보통신학회논문지
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• 제23권12호
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• pp.1492-1499
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• 2019

이 논문에서는 적응적 패럴랙스 베리어 방식에서, 시청영역을 제어할 수 있도록 사용자의 위치를 추적하는 방법을 제안한다. 얼굴자세에 강건한 양안거리 측정을 위해, 형태모델과 랜드마크 기반인 CLM으로 자세를 추정한다. 카메라와의 상관관계로, 거리와 수평위치를 거리로 변환한다. 사용자의 눈의 위치에 따라 적응적 패럴랙스 베리어의 화소간격을 조정하고, 베리어를 이동해 시청영역을 조정한다. 이 논문에서는 60cm부터 490cm의 범위에서 사용자를 추적하는 방법을 제안하고, 카메라 영상의 해상도에 따른 에러, 측정 가능 범위, fps를 측정하였다. 그 결과, 사용자를 평균 3.1642cm의 절대오차 범위내로 측정 가능하였으며, 영상의 해상도에 따라 320×240에서 약 278cm, 640×480에서 약 488cm까지, 그리고 1280×960에서 약 493cm까지를 측정할 수 있었다.

• 현장농수산연구지
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• 제11권1호
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• pp.3-19
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• 2009

The purpose of this study was to systemize the 'Eagi(理氣)' theory in Feng Shui which has been neglected in Korea because of its difficulties in the current Feng Shui theory and to make it easier to apply in the art of placement. The study also analysed the characteristics of the location of a sample village in terms of Feng Shui. Besides the placement analysis, the interpretation of the Yangtaek(陽宅) theory was analysed on the layout of the outdoor space of the building. As the initial step, various theories about Feng Shui were investigated. Based on those, the framework of the Feng Shui theory was summarized for application to the case study. Yangtaeksamyo(陽宅三要) was referred to for consideration of Feng Shui theory outside the residential buildings. At the same time, configurational analysis of the ground was carried out with the naked eye and actual measurements were taken using a specific compass(佩鐵). The results were summarized as follows : First, the 'Eagi' theory in Feng Shui, which finds a 'lucky site(穴)' selects the 'geomagnetic aspect(坐向)' by analyzing the natural forces of wind and water. In this theory, the aspect was regarded of most importance. 'Yangtaek Feng Shui (陽宅風水)' was the theory that people's ups and downs depends on the direction of the place where they live on, and was developed on the basis of 'I ching(周易)'. Second, the village and the house in the case study have been considered as lucky places from old times and this was equally verified by the 'Eagi (理氣)' theory and the "Yangtaek (陽宅)' theory.

• 치과방사선
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• 제16권1호
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• pp.59-68
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• 1986

The purpose of this investigation was to locate the central plane of the image layer on the panoramic machine relative to a specific point on the machine. In the study of the central plane of the image layer of panoramic radiograph, using the Morrita Company PANEX-EC a series of 33 exposures were taken with the 4-5 experimental pins placed in the holes of the plastic model plate, then evaluated by human eye. The author analyzed the central plane of the image layer by Mitutoyo-A-221 and calculated horizontal and vertical magnification ratio in the central plane of the image layer determined experimentally. The results were as follows: 1. The location of the central plane of the image layer determined experimentally was to lateral, compared with manufactural central plane. 2. Horizontal magnification ratio in the central plane of the image layer determined experimentally was 9.25%. 3. Vertical magnification ratio in the central plane of the image layer determined experimentally was 9.17%.

• 대한인간공학회지
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• 제25권2호
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• pp.135-146
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• 2006

Multimodal interfaces are recognition-based technologies that interpret and encode hand gestures, eye-gaze, movement pattern, speech, physical location and other natural human behaviors. Modality is the type of communication channel used for interaction. It also covers the way an idea is expressed or perceived, or the manner in which an action is performed. Multimodal Interfaces are the technologies that constitute multimodal interaction processes which occur consciously or unconsciously while communicating between human and computer. So input/output forms of multimodal interfaces assume different aspects from existing ones. Moreover, different people show different cognitive styles and individual preferences play a role in the selection of one input mode over another. Therefore to develop an effective design of multimodal user interfaces, input/output structure need to be formulated through the research of human cognition. This paper analyzes the characteristics of each human modality and suggests combination types of modalities, dual-coding for formulating multimodal interaction. Then it designs multimodal language and input synchronization method according to the granularity of input synchronization. To effectively guide the development of next-generation multimodal interfaces, substantially cognitive modeling will be needed to understand the temporal and semantic relations between different modalities, their joint functionality, and their overall potential for supporting computation in different forms. This paper is expected that it can show multimodal interface designers how to organize and integrate human input modalities while interacting with multimodal interfaces.

• 한국멀티미디어학회논문지
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• 제17권2호
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• pp.257-265
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• 2014

3D입체영상은 인간의 눈을 지향하면서 하드웨어의 발전에 따라 새롭게 부각되고 있다. 그러나 3D입체영상은 두 대의 카메라 또는 두 개의 렌즈를 사용하면서 2D영상의 제작에 비해 많은 시간과 노력을 필요로 한다. 본 연구에서는 3D입체영상의 제작기법을 활용하여 라이더영상을 제작하기 위한 시스템의 장단점을 분석하고, 효과적인 입체감의 형성을 위한 요소를 적용하여 연출의도에 부합하는 3D입체 라이더영상을 제작할 수 있는 방안을 모색하였다. 연구결과 3D입체 라이더영상은 장르적 특성으로 인해 경량화된 일체형 시스템이 효과적이었으며, 후반작업에서의 Time Remapping, 색보정, 그래픽요소의 추가를 고려한 로케이션 촬영이 요구되었다.

• 한국멀티미디어학회논문지
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• 제23권3호
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• pp.468-475
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• 2020

In this paper, we proposed a three-dimensional visualization system for medical images in augmented reality based on deep learning. In the proposed system, the artificial neural network model performed fully automatic segmentation of the region of lung and pulmonary nodule from chest CT images. After applying the three-dimensional volume rendering method to the segmented images, it was visualized in augmented reality devices. As a result of the experiment, when nodules were present in the region of lung, it could be easily distinguished with the naked eye. Also, the location and shape of the lesions were intuitively confirmed. The evaluation was accomplished by comparing automated segmentation results of the test dataset to the manual segmented image. Through the evaluation of the segmentation model, we obtained the region of lung DSC (Dice Similarity Coefficient) of 98.77%, precision of 98.45%, recall of 99.10%. And the region of pulmonary nodule DSC of 91.88%, precision of 93.05%, recall of 90.94%. If this proposed system will be applied in medical fields such as medical practice and medical education, it is expected that it can contribute to custom organ modeling, lesion analysis, and surgical education and training of patients.

• 비파괴검사학회지
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• 제35권3호
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• pp.206-214
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• 2015

In this study, low-velocity impact damage (LVID) in glass fiber reinforced plastic (GFRP) was investigated using pulse thermography (PT) and lock-in thermography (LIT) techniques. The main objective of this study was to evaluate the detection performance of each technique for LVID in GFRP. Unidirectional and cross-ply GFRPs were prepared with four energy levels using a drop weight impact machine and they were inspected from the impact side, which may be common in actual service conditions. When the impacted side was used for both inspection and thermal loading, results showed that the suggested techniques were able to identify the LVID which is barely visible to the naked eye. However, they also include limitations that depend on the GFRP thickness at the location of the delamination produced by the lowest impact energy of five joule.