• 한국의류학회지
• /
• 제29권8호
• /
• pp.1114-1124
• /
• 2005

The purpose of the paper is to find the elements of jacket pattern far the obese women who went to slenderize their shape by optical illusion. Representative four subjects participated in wear tests. Subjective evaluation of the visual appearance we collected and, at the same time, 3D clothing air volume was observed for the four types of experimental jackets. As results it was found that narrower shoulder width, back upper width, and front waist width resulted in slender look, however, back abdomen width and front shoulder length induced more slender appearance in waist area. The result of the distance between clothing and skin measured by 3D scanner clearly demonstrated the distribution of ease due to the elements of pattern, which is useful to find the pattern variables responsible for the slender appearance of the obese women.

• 한국CDE학회논문집
• /
• 제6권2호
• /
• pp.133-139
• /
• 2001

Since a great number of 2D engineering drawings are being used in industry and at the same time 3D CAD becomes popular in recent years, we need to reconstruct 3D CAD models from 2D legacy drawings. In this thesis, a combination of a feature recognition method and an expert system is suggested for the 3D solid model reconstruction. Modeling primitives of 3D CAD systems are recognized and constructed by using the pattern matching technique of the features modeling. Additional information for the 3D model reconstruction can be generated by extracting symbols or text entities which are related to form entities. For complex and indefinite cases which cannot be solved by the process of feature recognition, an expert system with a rule base has been used for decision-making. A 3D reconstruction system which recognizes 2D DXF drawing files has been implemented where models composed with protrusions, holes, and cutouts can be handled.

• 복식문화연구
• /
• 제12권2호
• /
• pp.290-299
• /
• 2004

The purpose of this study is to testify the pattern making method to develop the men's basic bodice pattern using 3-dimensional body scan data. The experimental patterns were made by adding wearing ease on flattened body scan data and tracing the outlines of it. The experimental bodice pattern were composed of front, back, and side panels. To compare the difference between the experimental pattern and traditional pattern, two pattern making methods were compared. Two sets of basic bodice patterns were made for each of the 10 male subjects: a set of pattern was made by experimental method and the other set was made by Bunka pattern making method. The experimental and traditional patterns were measured at 13 dimensions. The results show that there was a difference between the experimental patterns and traditional patterns at the front length, back length, front width, front neck width, back neck width, and back neck depth. The fit was also compared for both patterns. The results of the fit test show that the experimental patterns were superior to the traditional patterns at the fit of neck, shoulder, and armhole. The experimental pattern making method was expected to be useful for mass customization.

• 한국컴퓨터정보학회논문지
• /
• 제25권6호
• /
• pp.143-154
• /
• 2020

본 연구에서는 3차원 시뮬레이션을 통해 70-80대 노년 남성의 보디스 원형 4종을 제작한 후 가상착의를 통해 외관평가를 실시하였다. 객관성을 위해 공극률, 단면도, 색분포도 등을 분석하여 패턴 간의 차이를 비교 분석하였다. 노년 남성용 보디스 원형의 패턴형태는 L패턴을 제외하고 모든 패턴이 다트가 없는 패턴이었다. 가상착의에 대한 외관평가 결과, 노년 남성용 보디스 패턴은 앞면, 옆면, 뒷면 모든 항목에서 패턴 간에 유의미한 차이가 있는 것으로 나타났으며, 옆면의 진동둘레 형태를 제외한 모든 항목에서 H패턴이 가장 우수한 패턴으로 분석되었다. 공극량, 색분포도, 단면도 등의 평가에서도 H패턴이 가장 우수하여 노년 남성에게 가장 적합한 패턴으로 분석되었다. H패턴을 기준으로 노년 남성의 상반신 체형에 적합한 패턴 개발이 이루어져야 할 것으로 생각된다.

• 소성∙가공
• /
• 제33권2호
• /
• pp.123-131
• /
• 2024

Plastic, the main material of FFF-type 3D printing, exhibits lower strength compared to metal. research aimed at increasing strength is needed for use in various industrial fields. This study analyzed three X-shape infill patterns(grid, lines, zigzag) with similar internal lattice structure. Moreover, tensile test considering weight and printing time was conducted based on the infill line multiplier and infill overlap percentage. The three X-shape infill patterns(grid, lines, zigzag) showed differences in nozzle paths, material usage and printing time. When infill line multiplier increased, there was a proportional increase in tensile strength/weight and tensile strength/printing time. In terms of infill overlap percentage, the grid pattern at 50% and the zigzag and lines patterns at 75% demonstrated the most efficient performance.

• 한국정밀공학회지
• /
• 제17권10호
• /
• pp.119-124
• /
• 2000

One of the main problems in 3D shape measuring systems that use the triangulation of line-shaped laser light is precise center line detection of line-shaped laser stripe. The intensity of a line-shaped laser light stripe on the CCD image varies following to the reflection angles, colors and shapes of objects. In this paper, a new center line detection algorithm to compensate the local intensity variation on a line-shaped laser light stripe is proposed. The 3-D surface shape measuring system using the proposed center line detection algorithm can measure 3-D surface shape with enhanced measurement resolution by using the dynamic shape reconstruction with adaptive pattern clustering of the line-shaped laser light. This proposed 3-D shape measuring system can be easily applied to practical situations of measuring 3-D surface by virtue of high speed measurement and compact hardware compositions.

• 한국의류학회지
• /
• 제33권1호
• /
• pp.68-79
• /
• 2009

It is inevitable to have cutting line to get the 2D pattern from 3D body surface. In this paper the efficiency of curvature plot as a cutting line in the process of flattening 3D surface was investigated. As reference, basic clothing construction line was adopted to divide the 3D surface into small blocks to make the flattening process easy. Female dummy as well as human body were scanned and surface of the upper body was segmented using curvature plot and basic constructing line. 2D tight-fit pattern was developed using three software, the RapidForm 2004, 2C-AN and Yuka CAD. Gap between clothes and body, and the clothing pressure on the body was observed to determine the fit of the clothes. As results, clothes constructed with blocks divided by curvature plot displayed a similar level of tight fit as compared with those by basic construction line. It was found that curvature plot is effective method as a segmentation of the 3D surface even for the actual body which does not have any previous reference line. It is expected that application of curvature plot will be expanded in 3D apparel technology.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2017년도 춘계학술대회
• /
• pp.331-334
• /
• 2017

최근 3D 측정을 위해서 Fringe pattern을 이용하는 방법이 많이 사용되고 있다. 이는 측정할 물체에 pattern을 뿌려 얻은 위상 값을 이용하여 측정하는 방법이다. 이를 위해선 위상 값을 계산하고 높이를 계산하는 등의 많은 연산을 요구 한다. 많은 연산량에 따라 시간이 많이 걸리고 있으며, 본 논문에서는 이 시간을 감소시키기 위해서 엔비디아의 CUDA를 이용한 방법을 제시한다. 또 위상 값과 높이를 계산하는 방법을 소개하고 CPU 버전과 CUDA 버전 사이의 비교를 통해 정확한 시간 차이를 보인다. 이 방법을 이용하면 같은 연산을 더 짧은 시간 내에 처리할 수 있어 같은 시간에 많은 부품을 검사할 수 있기 때문에 매우 효과적이라 할 수 있다.

• 한국의류산업학회지
• /
• 제2권3호
• /
• pp.239-245
• /
• 2000

The purpose of this study was for analysis of ease about basic bodice pattern, as the first step of the research process for the drawing method of basic bodice for women in their twenties. The five selected basic bodice were made and they were worn by FRP body The garment space of each bodice was measured by analysis of the garment space of each section in figure of polymerization of cross section by a 3-D measuring instrument. The research suggests that this compared analysis is an objective reference. This analysis not only of the area of cross section of garment space and ease but also of the girth of the body shape and wearing shape, using the PAD system and 3-D measuring instrument, can be helpful in making garment patterns.

• 한국전자파학회논문지
• /
• 제11권6호
• /
• pp.1006-1014
• /
• 2000

1차 방사기 이동만으로 전 방향에 대해 빔포인팅이 용이한 르네베르그렌즈 안테나를 절반의 르제베르그렌즈 단면에 반사판 부착으로 소형화, 경량화한 반구형 르네베르그렌즈 안테나(주파수 9.375GHz, -3dB 빔 폭 6$^{\circ}$, 렌즈 직경 30.3cm(약 10λ))를 설계 제작하였다. 특성측정결과 -3dB 빔 폭 E면 6.1$^{\circ}$, H면 5.5$^{\circ}$로 설계치대로 양호한 빔 특성이 얻어졌으며, 이득은 약 26dBi(균일분포에 대한 개구효율 $\pi$=44.97%)로 1차 방사깅니 구형마이크로스트립 안테나보다 20.4dB 증가되었다. 또한, 1차 방사기의 근사패턴을 형성시켜 이를 2차 개구면 소스로 한 원방계패턴 계산결과 설계치와 일치함을 확인하였다. 한편, 우선.좌선원편파 특성을 갖도록 1차 방사기를 설계하여 원편과 반구형 르네베르그렌즈 안테나를 구성하였다. 특성 측정결과 -3dB 빔 폭 5.8$^{\circ}$, 사이드로브 -15.3dB, 편파분리도 25dB, 축비 0.74dB, 축비 2dB 이하의 주파수범위 약 1.4GHz(14.9%)로 비교적 광대역의 양호한 원편파특성이 얻어졌다.