• 한국의류산업학회지
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• 제17권2호
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• pp.265-277
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• 2015

The aim of this study was to successfully reflect human body changes on the transformation of the virtual body within 3D virtual fitting spaces. For this purpose, existing problems of shape transformation of the virtual body were analyzed and regression equations which provides useful basic data for transformation of the virtual body that can be applied usefully to the 3D virtual fitting system was developed. Necessary data for the analyses were body measurement and 3D scan data of women with average physical form between the ages of 40 through 49. The reason that we used human body changes of the female subjects in their forties was based on the recognition that fundamental female body changes start to occur from age of forty. Body shapes were largely divided into 3 groups according to obesity which was found to be the biggest factor of shape change. Seven factors were extracted based on factor analysis of 47 body measurement categories and regression equations were created to extract specific measurements for each BMI group based on these seven factors. The major contribution of this paper can be summarized as follows. First, the regression equations to extract specific measurements based on the 7 representative variables remediated existing problem of virtual bodies as it increased the number of body shape transformation areas. Second, the regression equations helped to overcome the problem of current failing to reflecting changes in body cross-section shape based on simple girth measurements based on analysis of cross-section distances.

• 한국의류학회지
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• 제45권6호
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• pp.965-977
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• 2021

The study aimed to analyze the functional differences in 3D virtual garment programs and compare body scan data with the corresponding 3D virtual models. We selected 3D virtual garment programs, formed virtual models in a representative size for high-school male cyclists, and analyzed them using the Design-X program. The results were as follows. In the 3D virtual garment programs, the anthropometric items for virtual model forming differed significantly from the standard anthropometric items suggested by Size Korea. Comparing the lower body scan data and virtual models formed by the 3D virtual garment programs, the biggest difference was in the shapes of the waist and hips, i.e., the flatness values of the waist and hips were different for each program in the cross-section view. In the lower body, a data-input-based program was needed for changing the exact measurement position of the waist circumference and hips' shape in detail. If a 3D virtual garment program provides functions for the virtual model's joint angle input and free motion transformation, it is expected to be widely used in the sportswear industry.

• 한국의류산업학회지
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• 제23권6호
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• pp.744-757
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• 2021

This study aims to develop a bodice and a jacket in 3D of the late 19th to early 20th based on the pattern drafting book of Gordon S. S., which contains body measurement method and pattern drafting system. The findings of this research are as follows. First, female tops of the late 19th to early 20th century are categorized as outer, jacket, vest, and bodice. Of these, this study highlights the jacket, which can be divided into 4 types: 4 kinds of basic jacket, 2 kinds of riding jacket, bolero jacket, and newmarket jacket. Second, by referring to Gordon's pattern drafting system and book, a bodice was developed in 3D format based on the adherence to the following steps: analysis of the pattern drafting system, pattern drafting, 3D virtual simulation, 3D virtual fitting analysis, and the pattern correction. A bodice pattern corrected by 3D virtual clothing simulation results was proposed. Last, a basic sleeve and collar pattern for a basic jacket was drafted, which was followed by the correction and transformation of the bodice pattern. The jacket developed shows great fit except for the issues at the armhole line and shoulder, which were caused by the unique shape of the sleeves(big sleeve head) of the time. The study attempted to develop the past costumes in 3D, providing the basis for interdisciplinary research in the field of fashion history field and suggesting a new approach for the virtual restoration of costumes. Future studies should target to 3D virtual simulation in accordance to the 3D avatar pose in the developed virtual costume.

• 한국산업정보학회논문지
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• 제24권6호
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• pp.25-34
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• 2019

가상착용기술(VTON: Virtual try-on)은 의상의 온라인 유통을 활성화를 위하여 중요한 기술이다. 그러나 3차원 그래픽스기반 방식은 의상과 인체의 3차원 정보의 확보가 필요하여 범용화에 어려움이 있고, 이러한 제약을 해소하기 위해 개발되는 이미지 기반 방식들의 연구들은 그 기술적 한계가 불명확하다. 구체적으로 VITON (Virtual image try-on) 과 CP-VTON (Content preserving VTON)등은 가능성 위주의 매우 단편적인 결과만을 제시하고 있다. 본 논문은 이미지기반 기술의 상용화의 한계를 파악하기 위해, 세 가지 대표적 방식(SCMM 기반의 비-딥러닝 방식, 딥러닝기반 VITON 과 CP-VTON에 대하여 인물의 자세 및 체형, 의상의 가려짐 정도, 의상의 특성 등에 따라 분석을 하였다. 객관적인 평가를 위하여 변형단계와 합성단계의 성능을 각각 IoU와 SSIM로 평가하였고, 상대적인 비교 분석을 하였다. 그 결과, CP-VTON이 가장 좋은 성능을 보이지만, 자세와 의상의 복잡도에 따라 성능의 한계가 크게 차이가 남을 보였다. 그 주 원인은 2차 기하변형의 한계와 GAN을 통한 합성 기술의 한계로 파악되었다.