• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 1995년도 학술대회
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• pp.87-90
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• 1995

In this paper, we propose a new deinterlacing algorithm based on weighted wide vector correlations. This algorithm is developed mainly for the format conversion problem encountered in current HDTV system, but not limited to. By having wide vector correlations, visually annoying artifacts caused by interlacing, such as a serrate line, line crawling, a line flicker, and a large area flicker, can be remarkably reduced, since the use of wide vector correlation increases the detectability of edges in various orientations.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2003년도 가을 학술발표회 논문집
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• pp.122-125
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• 2003

Ultrasonic wave has three classes of applications such as communication, inspection, imagination and processing. In processing, ultrasonic is used web bonding for nonwovens with applications including floppy disks, medical devices and many automotive Part. The important components of ultrasonic system are power supply, converter, booster, hem, anvil roller, pressure system and hold time controller. (omitted)

• 복식
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• 제66권3호
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• pp.135-146
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• 2016

This study is examines the replica of the excavated braided belt that tied the Daedae(大帶) of Simui(深衣). This study aims to comprehend the structure and color of the excavated braided belt, and to reproduce the Jodae(braided belt) of Kim Won-taek(1683-1766) clan, which was excavated in Cheongju. Black dye was used on the belt since it was the color that remained the most on the artifact. This study in the color black is focused on the Cheungchosack in Jeonggongji(展功志) from the first volume of 'Yimwongyeongjeji(林圓經濟志)'. From the Kim Won-taek clan, the braided belt of Simui of Kim Won-taek and his son, Kim Shang-jik(1716-1773), have been excavated. The blackness of the braided belt was more apparent in Kim Shang-jik compared to Kim Won-taek, and also Kim Shang-jik's braided belt was darkbrown. So I mixed gallnut, green vitriol, ash tree and catechu, the ingredient of bluish black, in equal proportions. Kim Won-taek's silk thread was dyed 3 times and Kim Sang-jik's silk thread was dyed 5 times to reproduce the original belt. Based on the information from the 'Saryepyenlam(四禮便覽)' that the Jo was weaved with five colored threads, I reproduced the Jo with sophora flowers, gardenia, amur cork tree, safflower, madder and indigo sediment. Yeokeum organization(interlacing), which is a Jodae woven strands of both sets of 15 repeats construction were in the mixed organization of 3/2 and 2/2.

• 한국통신학회논문지
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• 제34권4C호
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• pp.371-379
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• 2009

본 논문에서는 텍스쳐 감지를 이용한 화소값 기울기 필터 및 중간값 필터 기반의 비디오 시퀀스 디인터레이싱 알고리듬을 제안한다. 먼저 보간 할 픽셀의 주변 픽셀들을 이용하여 현재 보간 할 영역이 텍스쳐가 존재하는 영역인지 아니면 평탄한 영역인지를 판단한다. 제안하는 알고리듬에서는 보간 할 영역이 평탄한 영역으로 판단되면 중간값 필터를 이용하여 보간을 하고, 텍스쳐 영역으로 판단되면 화소값 기울기 필터를 이용하여 보간을 하게 된다. 그러므로 현재의 보간 할 영역은 두 개의 카테고리로 분류 할 수 있다. 제안하는 알고리듬은 상황에 맞게 적응적으로 보간을 수행하므로 좀 더 선명하고 정확한 영상을 얻을 수 있다. 그리고 여러 가지 CIF 동영상에 대한 실험 결과는 제안하는 알고리듬이 기존의 알고리듬 보다 객관적, 주관적으로 우수함을 보여준다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2014년도 하계학술대회
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• pp.169-172
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• 2014

일반적으로 격행주사(interlace) 된 Side by Side (SbS) 영상의 경우 화면 재생 시, 전송 받은 영상을 먼저 디인터레이싱(de-interlacing) 한 후에 좌우 영상을 분리하여 수평 해상도를 보간 하는데, 이때 한번 가공된 디인터레이싱 값을 참조하여 보간 값을 결정하게 되는 관계로 수평 해상도의 정확성이 크게 떨어지게 된다. 이러한 문제점을 해결하기 위해 격행주사 방식의 SbS 3D 영상의 수평 해상도 보간 방법을 제안한다. 수평 해상도 보간 시에 격행주사 방식으로 전송 받은 라인과 디인터레이싱 기법을 이용해 보간한 라인의 특성에 따라 각 라인에서 활용할 수 있는 전송 받은 값을 가지고 각각 다른 보간 방법을 적용함으로써 정확도를 향상하는 방법을 제안한다. 제안된 방법의 실험 결과는 기존의 보간 기법들보다 주관적, 객관적 화질에서 더욱 우수한 성능을 보여준다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2010년도 하계학술대회
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• pp.424-425
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• 2010

본 논문에서는 영상의 종류에 따른 움직임 정보를 통계 값을 계산 하여 분산 및 평균값을 계산하여 적용하는 움직임 적응형 디인터레이싱 기법을 제안한다. 제안하는 알고리즘은 움직임 검출, 영상의 따른 분산 및 평균값 계산, 영상의 유형에 따른 상한, 하한 값 결정을 하여 시간적, 공간적 디인터레이싱을 선택적으로 하여 보간 하게 된다. 또한 Modified DOI 방식을 제안하여 복잡도가 높은 영상과 수직성분에서 개선이 된 M-ELA 를 사용하고, 수평 성분에서는 우수한 성능을 가진 DOI 방식을 개선한 Modified DOI 방식을 사용하여 DOI 계열의 복잡한 연산을 개선한 공간적 디인터레이싱 방법을 적용하였다. 다양한 영상에 대한 실험을 통하여 제안한 방식이 기존의 디인터레이싱 방법에 비해 좋은 성능을 보임을 확인하였다.

• International Journal of Aeronautical and Space Sciences
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• 제18권2호
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• pp.222-235
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• 2017

In this study, finite element modeling was used to predict the material properties of tri-axially braided textile composite. The model was made based on an experimental test specimen which was also used to compare the final results. The full interlacing of tows was geometrically modelled, from which repeating parts that make up the whole braid called unit cells were identified based on the geometric and mechanical property periodicity. In order to simulate the repeating nature of the unit cell, periodic boundary conditions were applied. For validation of the method, a reference model was analyzed for which a very good agreement was obtained. Material property calculation was done by simulating uniaxial and pure shear tests on the unit cell. The comparison of these results with that of experimental test results showed an excellent agreement. Finally, parametric study on the effect of number of plies, stacking type (symmetric/anti-symmetric) and stacking phase shift was conducted.

• Journal of Chest Surgery
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• 제33권1호
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• pp.112-115
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• 2000

A-13-urar-old with a history of Alport syndrome had been suffering from progressive dysphagia and postprandial vomiting for over 7 years. Exophagogram and manoemtric studies were consistent with achalasia. Barum study demonstrated marked esophageal dilatation and smooth tapered narrowing of the distal esophagus. However in spite of the medical treatment including the injection of the distal esophagus. However in spite of the medical treatment including the injection of botulinum toxin at the lesion site using an endoscope symptom did not improved and he suffered growth failure and malnutrition. Esophagectomy and esophagogastrostomy were performed to relieve the dysphagia. A firm circumferential intramural mass about 7$\times$5$\times$5 cm was found in the distal esophagus. The lumen of the esophagus was markedly dilated and esophageal wall was hypertrophied. Histologic examination of the neoplasm revealed a rather ill defined tumor tissue consisting of interlacing or whirling spindle cells without significant mitosis and esophageal leiomyo-matosis was confirmed. The patient was discharged uneventfully.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.1046-1049
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• 2005

We have developed polymer LED displays using ink jet printing without visible swathe marks which can be observed during display operation. In addition, we have also developed a single-pass printing technology for hole-conduction layer deposition to significantly reduce the complexity of interlacing printing across the panel which is known as an alternative to remove the swathe mark.

• 방송공학회논문지
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• 제1권1호
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• pp.44-54
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• 1996

In this paper, we propose a new 3-D deinterlacing algorithm based on wide sparse vector correlations and a vertical edge based motion detection algorithm. which is an extension of the deinterlacing algorithm proposed in [10. llJ by the authors. The prooised algorithm is developed mainly for the format conversion problem encountered in current HDTV system, but can also be aplicable to the double scan conversion problesm frequently encountered in ths NTSC systems. By exploiting the edge oriented spatial interpolation based on the wide vector correlations, visually annoying artifiacts caused by interlacing such as a serrate line. line crawling, a line flicker, and a large area flicker can be remarkably reduced since the use of the wide vectors increases the range of the edge orientations that can be detected, and by exploiting sparse vectors correlations the HjW complexity for realizing the algorithm in applications cam be significantly simplified. Simulations are provided indicating thet the proposed algorithm results in a high performance comparable to the performance of the deinterlacing algorithm. based on the wide vector correlations.