• 패션비즈니스
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• 제26권1호
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• pp.53-67
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• 2022

The purpose of this study was to compare the appearance similarity between a 3D virtual wedding dress, and a model wearing real dress, and production efficiency, and the possibility of achieving similar results with 3D digital technology. Five wedding dresses for small weddings under the theme of 'Dream Series', were designed and produced in virtual and real dresses to quantitatively compare and analyze the appearance similarity and production efficiency. Experts compared the appearance similarity on the silhouettes, colors, materials, and details, and production efficiency was compared with time and cost. Based on our results, 3D virtual images of four out of the five dresses were similar to the real images. Our efficiency evaluation results showed that the manufacturing time was 45.4% shorter, and the manufacturing cost was 46.1% less than the existing method. This indicated that the wedding dress manufacturing process using 3D virtual software was time and cost saving competitive. Our results also confirmed that 3D virtual software technology has the potential to increase the efficiency of designing and production, and therefore an increase in competitiveness and sales of wedding dresses. Furthermore, 3D technology allows consumers to select and order wedding dresses online through 3D virtual software. This is a great advantage, and it highlights the significance of this research study.

• 한국통신학회논문지
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• 제37권1A호
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• pp.57-63
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• 2012

본 논문에서는 양안식 3차원 디스플레이 장치에 사용가능한 실시간 가상시점 영상을 생성방법을 제안한다. 제안하는 방법은 변이 탐색 (disparity estimation) 과정에서 중복되거나 불필요한 계산을 제거하기 위해, 변이맵 탐색 위치를 가상시점과 동일한 위치로 설정한다. 또한, 전역 방법을 사용한 변이맵 탐색 과정은 정확도는 높지만 복잡한 계산량이 문제이기 때문에 최적화 과정에서 변이값이 수렴하는 위치를 탐색하고 정보 갱신을 멈추는 방법을 사용하였다. 이렇게 얻어진 가상시점의 변이맵은 실제 참조가 가능한 영역인지 판단하는 수렴 조건 판단 (convergence check) 절차를 거쳐 영상을 합성한다. 영상 합성을 위한 모든 과정은 실시간 처리를 위하여 단일 명령 복수 쓰레드 (Single Instruction Multiple Threads) 구조인 그래픽 처리장치(GPU)를 활용한 프로그래밍을 통해 고속화를 이루었다. 실험 결과를 통해 제안하는 방법이 합성 영상의 화질을 유지하면서도 실시간으로 가상시점 영상을 합성한 것을 확인할 수 있었다.

• 디지털콘텐츠학회 논문지
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• 제19권4호
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• pp.605-613
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• 2018

본 논문에서는 가상현실 기술로 전 세계를 도보 여행할 수 있는 시스템을 제안한다. 가상 여행 콘텐츠에 대한 가상현실 이용자들의 관심이 높으나 기존의 가상 여행 콘텐츠는 체험할 수 있는 공간이 한정되어 있고 상호작용성이 부족한 문제가 있었다. 기존 콘텐츠의 단점인 현실감 부족과 제한된 공간의 문제를 해결하고자 본 시스템에서는 구글 스트리트 뷰 이미지를 사용하여 가상 공간을 생성하였으며 사용자는 실제 거리 이미지를 통해 현실적인 체험이 가능하고 구글 스트리트 뷰 이미지에서 제공하는 방대한 지역을 여행할 수 있다. 또한 가상공간 안에서 사용자의 상호작용성을 높이고 몰입감을 극대화 하기 위하여 가상현실 헤드셋과 트레드밀 장비를 사용하여 사용자가 실제로 도보를 하며 가상공간을 이동할 수 있도록 하였다. 실제 관광 명소에서 산길과 골목길까지 자연스러운 도보 여행이 가능한 본 시스템의 활용으로 사용자들의 여가 활동에 크게 기여할 것으로 기대된다.

• 한국의류학회지
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• 제41권6호
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• pp.1085-1097
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• 2017

In the era of new media, images hold an important position as episteme to express and convey ideas. Fashion films provide dynamic and unique fashion images, differentiated from prior fashion media as a representational tool for showing a realistic fashion image only; consequently, their production and spread are increasing rapidly as a new fashion media. This study identifies the meaning and type of fashion images in fashion films based on the concept of Deleuze's image that help discover distinctive characteristics of fashion films as a new fashion media of an expressive tool. Literature research was conducted on new media, concepts and types of images by Deleuze to analyze types of new media images. According to research, fashion image in fashion film is defined as a fashion event; consequently, three types of new media images are derived. As the result of the empirical study, fashion images in fashion films are classified by images of realistic movement, variable time, and virtual experience. The results of the consideration show that fashion films expressed fashion through temporality and narrative, senses, and diegesis. Fashion images of new media in fashion films portray fashion as a process that transcends reality and imagination.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -1
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• pp.631-634
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• 2002

In this paper, we propose an improved optical security system using three phase-encoded images and the principle of interference. This optical system based on a Mach-Zehnder interferometer consists of one phase-encoded virtual image to be encrypted and two phase-encoded images, encrypting image and decrypting image, where every pixel in the three images has a phase value of '0' and '$\pi$'. The proposed encryption is performed by the multiplication of an encrypting image and a phase-encoded virtual image which dose not contain any information from the decrypted image. Therefore, even if the unauthorized users steal and analyze the encrypted image, they cannot reconstruct the required image. This virtual image protects the original image from counterfeiting and unauthorized access.. The decryption of the original image is simply performed by interfering between a reference wave and a direct pixel-to-pixel mapping image of the encrypted image with a decrypting image. Both computer simulations and optical experiments confirmed the effectiveness of the proposed optical technique for optical security applications.

• International Journal of Internet, Broadcasting and Communication
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• 제15권4호
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• pp.215-222
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• 2023

Augmented reality (AR), which integrates virtual media into reality, is increasingly utilized across various industrial sectors, thanks to advancements in 3D graphics and mobile device technologies. The IT industry is thus carrying out active R&D activities about AR platforms. Google plays a significant role in the AR landscape, with a focus on ARCore services. An essential aspect of ARCore is the use of anchors, which serve as reference points that help maintain the position and orientation of virtual objects within the physical environment. However, if the accuracy of anchor positioning is suboptimal when running AR content, it can significantly diminish the user's immersive experience. We are to assess the performance of these anchors in this study. To conduct the performance evaluation, virtual 3D objects, matching the shape and size of real-world objects, we strategically positioned ourselves to overlap with their physical counterparts. Images of both real and virtual objects were captured from five distinct camera trajectories, and ARCore's performance was analyzed by examining the difference between these captured images.

• 복식문화연구
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• 제25권1호
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• pp.48-63
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• 2017

When digital media and images are combined, their significant sociocultural impacts can be exercised. Therefore, this study analyzes digital images shown in such trends of digital media compared to the digital fashion from an aesthetic perspective. Research and empirical studies are focused upon to analyze the aesthetic characteristics of digital fashion. Digital Fashion comprehensively refers to fashion design using computers and software, and is considered as "Fashion Design utilizing Digital Technologies" including computer software and hardware perspectives, so that it may be renamed "Digital Fashion." The esthetic characteristics shown in the Digital Fashion defined above are analyzed according to how media philosophers conceptualize the digital image. First, from the perspective of creation, Digital Fashion Images are technical images produced by computers. Uncanny characteristics expressed through virtual images look more realistic than the actual ones used in experimental works of fashion designers. Such virtuality dynamically expresses various colors and fabric patterns through lights using digital technologies that do not yet exist in cloth form, rather in a non-material form of dynamic virtual imagery. Digital fashion images on monitors express digital fashion designs by shaping virtual images through 3D printing. Second, Digital Fashion Images from the perspective of acceptance are created through deconstruction, while fashion has only been previous viewed visually, Digital Fashion delivers immersions of visual touches as if directly experienced for accepters. Digital Fashion will continuously develop and become more influential as it converges with digital media.

• 제어로봇시스템학회논문지
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• 제15권7호
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• pp.700-710
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• 2009

A computer vision technique of estimating the location of an unmanned ground vehicle is proposed. Identifying the location of the unmaned vehicle is very important task for automatic navigation of the vehicle. Conventional positioning sensors may fail to work properly in some real situations due to internal and external interferences. Given a DSM(Digital Surface Map), location of the vehicle can be estimated by the registration of the DSM and multiview range images obtained at the vehicle. Registration of the DSM and range images yields the 3D transformation from the coordinates of the range sensor to the reference coordinates of the DSM. To estimate the vehicle position, we first register a range image to the DSM coarsely and then refine the result. For coarse registration, we employ a fast random sample matching method. After the initial position is estimated and refined, all subsequent range images are registered by applying a pair-wise registration technique between range images. To reduce the accumulation error of pair-wise registration, we periodically refine the registration between range images and the DSM. Virtual environment is established to perform several experiments using a virtual vehicle. Range images are created based on the DSM by modeling a real 3D sensor. The vehicle moves along three different path while acquiring range images. Experimental results show that registration error is about under 1.3m in average.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2001년도 추계종합학술대회
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• pp.173-176
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• 2001

본 연구에서는 요즘 학습자들의 다양한 능력 수준과 심리적 요인들을 동시에 고려하여 VRML 저작툴을 이용한 가상전시공간을 설계하였다. 감상학습을 현실감있게 하고, 상호 작용적이며, 흥미로운 학습동기를 유발하고자 Photo Vista, Object Modeler, Reality Studio 등의 3D WBI 저작툴을 이용한 Panorama Image와 3D Object 모듈을 구현하는 방법을 구현하였다. 본 연구에서는 이 가상 전시공간이 학생들의 미술교육에서 현실감있는 작품감상으로 학생들의 심미적인 면에 얼마나 많은 영향을 미치는지를 연구하고자 한다.

• Journal of Electrical Engineering and Technology
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• 제9권3호
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• pp.1016-1022
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• 2014

Kinect is a motion sensing camera released by Microsoft in November 2010 for the Xbox360 that is used to produce depth and color images. Because Kinect uses an infrared pattern, it generates holes and noises around an object's boundaries in the obtained images. The flickering phenomenon and unmatched edges also occur. In this paper, we propose a real time virtual-view video synthesis algorithm which results in a high quality virtual view by solving these problems stated above. The experimental results show that the proposed algorithm performs much better than the conventional algorithms.