• Journal of information and communication convergence engineering
• /
• 제17권1호
• /
• pp.67-73
• /
• 2019

In the current era of digital technology, and with the help of existing software, digital photo manipulation is becoming easier and faster. One example of this is the development of powerful image processing software that makes it easy for a digital image to be manipulated and edited. It is therefore very important to protect and maintain public trust in digital images. Several methods have been developed to detect image manipulation. In this paper, we compare two methods for detecting image duplication due to copy-move actions, namely the polar coordinate system and the histogram of oriented gradients methods. The former is a method based on the transfer of a Cartesian image to a polar form, making it easy to tell whether there are objects that have undergone a copy/move in an image, while the latter is a method for retrieving information related to the distribution, which uses a target in the local area as a tool to represent the shape of the target. We compare the accuracy, speed and memory usage of these two methods.

• 정보처리학회논문지:소프트웨어 및 데이터공학
• /
• 제10권3호
• /
• pp.109-114
• /
• 2021

GAN(Generative Adversarial Network, 생성적 적대 신경망)은 이미지 생성모델로서 생성기 네트워크와 판별기 네트워크로 구성되며 실제 같은 이미지를 생성한다. GAN에 의해 생성된 이미지는 실제 이미지와 유사해야 하므로 생성된 이미지와 실제 이미지의 손실 오차를 최소화하는 손실함수(loss function)를 사용한다. 그러나 GAN의 손실함수는 이미지를 생성하는 학습을 불안정하게 만들어 이미지의 품질을 떨어뜨린다는 문제점이 있다. 이러한 문제를 해결하기 위해 본 논문에서는 GAN 관련 연구를 분석하고 에지 검출(edge detection)을 이용한 eGAN(edge GAN)을 제안한다. 실험 결과 eGAN 모델이 기존의 GAN 모델보다 성능이 개선되었다.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
• /
• pp.792-797
• /
• 2002

In the following paper two algorithms, suitable for the analysis of panchromatic data as provided by KOMPSAT-1 will be presented. One is a texture analysis which will be used to create a settlement mask based on the variations of gray values. The other is a fusion algorithm which allows the combination of high resolution panchromatic data with medium resolution multispectral data. The procedure developed for this purpose uses the spatial information present in the high resolution image to spatially enhance the low resolution image, while keeping the distortion of the multispectral information to a minimum. This makes it possible to use the fusion results for standard multispecatral classification routines. The procedures presented here can be automated to large extent, making them suitable for a standard processing routine of satellite data.

• 한국정보통신학회:학술대회논문집
• /
• 한국해양정보통신학회 2002년도 춘계종합학술대회
• /
• pp.590-593
• /
• 2002

본 논문은 그레이영상에 대해 2D 스플라인 보간법과 2D 웨이블릿 변환을 적용하여 영상모핑을 실현한 연구이다. 프레임 간 특징 점 지정에 스플라인 함수로 B-스플라인 보간법을, 생성되는 중간 영상에 웨이블릿 변환 기법을 적용하였다. 그 결과 스플라인에 의해 유동적인 곡선변형과 웨이블릿 변환에 의해 블럭킹 열화가 제거되어 중간 영상들의 자연스러운 모핑이 이뤄졌다.

• 국제학술발표논문집
• /
• The 1th International Conference on Construction Engineering and Project Management
• /
• pp.503-508
• /
• 2005

In the modern, distributed and dynamic construction environment it is important to exchange information from different sources and in different data formats in order to improve the processes supported by these systems. Previous research has demonstrated that (i) a significant percentage of construction data is stored in semi-structured or unstructured data formats (ii) locating and identifying such data that are needed for the important decision making processes is a very hard and time-consuming task. In this paper, an automated methodology for the classification and retrieval of construction images in AEC/FM model based systems will be presented. Specifically, a combination of techniques from the areas of image processing, computer vision, and content-based image retrieval have been deployed to develop a method that can retrieve related construction site image data from components of a project model.

• 한국콘텐츠학회논문지
• /
• 제7권8호
• /
• pp.134-141
• /
• 2007

3D 애니메이션 작업의 결과물을 출력하는데 있어서 동영상 파일로의 렌더링이 가능하지만 대부분의 프로덕션에서는 Image Sequence 렌더링 방식을 택하고 있다. 이러한 Image Sequence 렌더링 방식은 최종 영상물 제작을 위한 합성에 있어서 중요한 과정이다. 이러한 Image Sequence 렌더링 방식에는 다양한 Format의 이미지 형태들이 사용되는데 그 대표적인 것으로서 TGA format을 들 수가 있다. 하지만 TGA format 방식의 이미지가 이러한 과정에서 최적인가에 대한 의문점이 제기되어지고, 3D 프로그램마다 고유의 이미지 format을 가지고 있다는 점에서 이에 대한 연구가 필요하다. 본 연구에서는 Alias 사의 Maya를 중심으로 이러한 Image Sequence format에 대한 압축률, 선명도, 합성 시 필요한 Alpha Channel의 보존성, Z-Depth에 관한 Information에 관하여 연구하고자 한다. 이 연구의 결과는 3D 애니메이션을 Pipeline에 Image Sequence format에 대한 가이드 라인을 제공해주는데 목적이 있다.

• 한국콘텐츠학회:학술대회논문집
• /
• 한국콘텐츠학회 2005년도 추계 종합학술대회 논문집
• /
• pp.131-136
• /
• 2005

3D 애니메이션 작업의 결과물을 출력하는데 있어서 동영상 파일로의 렌더링이 가능하지만 대부분의 프로덕션에서는 Image Sequence 렌더링 방식을 택하고 있다. 이러한 Image Sequence 렌더링 방식은 최종 영상물 제작을 위한 합성에 있어서 중요한 과정이다. 이러한 Image Sequence 렌더링 방식에는 다양한 Format의 이미지 형태들이 사용되는데 그 대표적인 것으로서 TGA format을 들 수가 있다. 하지만 TGA format 방식의 이미지가 이러한 과정에서 최적인가에 대한 의문점이 제기되어지고, 3D 프로그램마다 고유의 이미지 format을 가지고 있다는 점에서 이에 대한 연구가 필요하다. 본 연구에서는 Alias 사의 Maya를 중심으로 이러한 Image Sequence format에 대한 압축률, 선명도, 합성시 필요한 Alpha Channel 의 보존성, Z-Depth에 관한 Information에 관하여 연구하고자 한다. 이 연구의 결과는 3D 애니메이션을 Pipeline에 Image Sequence forma떼 대한 가이드라인을 제공해주는데 목적이 있다.

• 한국의상디자인학회지
• /
• 제13권1호
• /
• pp.59-71
• /
• 2011

As an exaggerated-shoulder becomes a growing trend women's clothing, the crescent shaped sleeve with parallel style lines in the arm hole is a highly used women's sleeve pattern. This study develops and provides an applicable method for making the crescent shaped power shoulder sleeve. An efficient basic method for making the 2 piece crescent shaped sleeve was developed and the sensory appearance test was carried out with experimental clothes. There are two principles for making the crescent shaped sleeve: having a style line in the sleeve and pasting part of the cut arm hole of the bodice to the sleeve. The latter would be more convenient for a 2 piece sleeve, mostly used for jackets. The crescent shaped sleeve used in power shoulder jackets should set the shoulder angle as you wish to extend and raise the shoulder point of the bodice and sleeve to the same height. For a stronger power shoulder image, a 3 piece sleeve has a better appearance. Also, the height of the shoulder has to be enhanced with a shoulder pad for a more stable sleeve.

• 한국가구학회지
• /
• 제19권2호
• /
• pp.141-150
• /
• 2008

Exploring on two major questions: 'Why do we feel more love for certain objects?' and 'How can design use this knowledge to realize design sustainability?', this article presents an alternative way of approaching the problem of design sustainability from the perspective that our relationships with design objects are of an extended mode of social relations. Recent discussions on design sustainability have transformed the notion of the problem by seeing it as a problem of our basic perception of design objects and our relationships with them. In this light, I propose that design sustainability could not be achieved solely by approaching from a mechanistic perspective, but by re-framing the way we see and relate things around us and by supporting our changes and actions to move forward a more sustainable notion of our relationships with the objects. As a way to realize design sustainability, I propose that design should involve story-making quality that supports our initiatives to build more affectional relations with objects by seeing the objects as entities of communication that tell stories of us, thus reflect our identities and meanings of our lives. Proceeding on the exploration of the subject, I present some of conceptual outlines in forms of an image diary, an interplay-able furniture unit, and a performance instruction that suggest a way for a special story-making process and thus a stronger emotional tie with the objects.

• 복식
• /
• 제56권6호
• /
• pp.33-44
• /
• 2006

With the basis of objective truth by the subjective sensibility and the Rock art's history and the molding the Rock arts image motive, the conclusion like this; The first, Rock art express the imagination variety as symbols of abundance, fecundity, stable lift's present mourning and absolute respect and the spirit. The second, the new motives are developed by making formative images with deeply understanding essential side in the Rock arts. With this, the pattern is repeated with making motive's repeat units and the new pattern is developed by 45-angle iteration. These cultural products were used to produce necktie, scarf, and clothing making commonly efficient use in actual life- with 3D simulation. Through developing Rock art pattern, it is great the possibility of development for expressing Korea images with making an excavation. A competitive design as to the international period can be developed with applying to the variety department-cultural products development.