• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.6
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• pp.143-151
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• 2014

Recently, as smartphones are widespread, a variety of user's information is created and managed in smartphones. Especially the location information can show the user's position at a specific time and the user's area of interest, which could be very useful during criminal investigation. Although the location information plays an important role in solving the crimes such as serial murder, rape and arson cases, there is a lack of research on location information for digital forensics. In this paper, we analyze the location information from logs, images, and applications on android, and we suggest the integrated model for analyzing location information. The proposed model may be useful in criminal investigation by improving the efficiency of data analysis and providing information about a criminal case.

• Digital Contents
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• no.10 s.113
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• pp.88-91
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• 2002

기술력만 있으면 투자자들의 발길이 끊이지 않아 행복한 비명을 질렀던 벤처기업에게 꿈같던 시절이 있었다. 하지만 각종 게이트가 터지며 거품은 빠지고, 그럴듯한 수익모델 하나 갖추지 못한 닷컴기업들은 인수합병되거나 흔적도 없이 사라져갔다. 대부분의 인터넷 기업들의 최고의 수익모델로 꼽은 것은 '인터넷 광고'. 웹사이트를 방문하는 많은 회원수와 페이지뷰만으로 광고주들의 시선을 끌 수 있었기 때문이다. 인터넷 광고의 침체기를 극복하고 시장회복의 단초를 보인 2001년 4/4분기의 회복세는 2002년 1/4분기와 2/4분기에도 이어졌다. 약9개월정도 연속적으로 인터넷 광고의 성장세가 이어졌으며, 지난 2/4분기까지의 결과를 살펴보면, 대부분의 인터넷 매체들은 실적 호조를 이루었으며, 주요 매체들은 사상 최고의 광고 수주 실적을 보이기도 했다. 새로운 도약을 준비하는 인터넷 기업들이 '비즈니스 모델'에 대해 취재했다. 그 첫 번째로 '인터넷 광고' 시장을 점검해 보았다.

• Proceedings of the Korea Contents Association Conference
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• 2019.05a
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• pp.373-374
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• 2019

애니메이션 영웅 캐릭터는 캐릭터의 한 카테고리로서 캐릭터 특유의 특징과 함께 전통적 이데올로기를 암묵적으로 전달하고 있다. 이들 애니메이션 영웅이 전달하는 전통적 메시지는 문화적 개성에 대한 심벌을 재해석하여 관객들에게 전통문화가 거부감없이 쉽게 받아들여지도록 하는 것이다. 애니메이션 <백사(White Snake, 2019)>는 중국에서 잘 알려진 백소정과 허선의 사랑이야기를 소재로 한것으로서 전통사상과 전통의상을 살리면서도 스토리텔링과 이미지 컨셉, 애니메이팅등의 시각적 요소들을 글로벌한 공감대를 얻을 수 있도록 노력한 흔적들을 보여주고 있다. 본문에서는 동양 애니메이션에서의 히어로 캐릭터와 디즈니 캐릭터 간의 차이점과 그 가치를 애니메이션<백사>를 통해 분석해보고 이를 통해 애니메이션 창작에 미치는 영향과 역할을 도출해보려 하였다.

• 한국HCI학회:학술대회논문집
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• 2008.02a
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• pp.39-44
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• 2008

This paper proposes a real-time geometric correction system based on a projector to project digital images onto deformable surface. Markers use to trace lots of corresponding points would spoil the projected image when the projector projects a digital image onto the surface because they leave marks on the surface. In addition, it is difficult to build a real-time geometric correction system since bottlenecks occur through the process of the geometric correction for projecting images. In this paper, we use invisible infrared markers and a vertex shader of GPU using Cg TookKit of NVIDIA in order to eliminate disadvantage and bottlenecks in the process of markers recognition so that it is possible to project natural correction images in real-time. As a result, this system overlays an interactive virtual texture onto the real paper by using the geometric transformation. Therefore, it is possible to develop variation of AR(Augmented Reality) based on digital contents systems.

• Journal of the Korea Society of Computer and Information
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• v.26 no.12
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• pp.111-121
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• 2021

As the main carrier of information, digital image is becoming more and more important. However, with the popularity of image acquisition equipment and the rapid development of image editing software, in recent years, digital image counterfeiting incidents have emerged one after another, which not only reduces the credibility of images, but also brings great negative impacts to society and individuals. Image copy-paste tampering is one of the most common types of image tampering, which is easy to operate and effective, and is often used to change the semantic information of digital images. In this paper, a method to protect the authenticity and integrity of image content by studying the tamper detection method of image copy and paste was proposed. In view of the excellent learning and analysis ability of deep learning, two tamper detection methods based on deep learning were proposed, which use the traces left by image processing operations to distinguish the tampered area from the original area in the image. A series of experimental results verified the rationality of the theoretical basis, the accuracy of tampering detection, location and classification.

• KIPS Transactions on Computer and Communication Systems
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• v.5 no.4
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• pp.95-102
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• 2016

Computer security incident such as confidential information leak and data destruction are constantly growing and it becomes threat to information in digital devices. To respond against the incident, digital forensic techniques are also developing to help digital incident investigation. With the development of digital forensic technology, a variety of forensic artifact has been developed to trace the behavior of users. Also, a diversity of forensic tool has been developed to extract information from forensic artifact. However, there is a issue that information from forensic tools has its own forms. To solve this problem, it needs to process data when it is output from forensic tools. Then it needs to compare and analyze processed data to identify how data is related each other and interpret the implications. To reach this, it calls for effective method to store and output data in the course of data processing. This paper aims to propose DFIOC (Digital Forensic Indicators Of Compromise) that is capable of transcribing a variety of forensic artifact information effectively during incident analysis and response. DFIOC, which is XML based format, provides "Evidence" to represent various forensic artifacts in the incident investigation. Furthermore, It provides "Forensic Analysis" to report forensic analysis result and also gives "Indicator" to investigate the trace of incidence quickly. By logging data into one sheet in DFIOC format for forensic analysis process, it is capable of avoiding unnecessary data processing. Lastly, since collected information is recorded in a normalized format, data input and output becomes much easier as well as it will be convenient to use for identification of collected information and analysis of data relationship.

• Journal of Digital Convergence
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• v.12 no.2
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• pp.1-10
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• 2014

Recently, the value and the status of the digital archives that are built individually in the crossroads of oblivion and memory are due to big data has attracted attention globally is confusing. Video data that contains the cultural memory of the digital archive, such as culture, art, life, society, and social conditions of the time, it is a cultural heritage of national common expressed. Also, it remains a trace of history from the various media just like magazines, books, painting, photography, and film. Digital archive system is one of the best research results of media convergence and it has also a good opportunity to take full advantage of the new opportunities and cultural assets. The collection of infinite information of big data in perspective transient that exist at the same time compatibility of big data, it is trying to dismantle the cultural memory of us. It was asserted that must meet the criteria which can correspond to via the new digital era, will be applied to preserve the traditional media. The current image archive is necessary to accommodate proper two different directions.

• Journal of Internet Computing and Services
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• v.13 no.3
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• pp.49-59
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• 2012

Throughout developing digital technology, reproduction of image is growing better day by day. And at the same time, diverse image editing softwares are developed to manage images easily. In the process of editing images, those programs could delete or modify EXIF files which have the original image information; therefore images without the origin source are widely spread on the web site after editing. This matter could affect analysis of images due to the distortion of originality. Especially in the court of law, the source of evidence should be expressed clearly; therefore digital image EXIF file without deletion or distortion could not be the objective evidence. In this research, we try to trace the identification of a digital camera in order to solve digital images originality, and also we focus on lens distortion correction algorism which is used in digital image processing. Lens distortion correction uses mapping algorism, and at this moment it also uses interpolation algorism to prevent aliasing artifact and reconstruction artifact. At this point interpolation shows the similar mapping pattern; therefore we want to find out the interpolation evidence. We propose a minimum filter algorism in order to detect interpolation pattern and adjust the same minimum filter coefficient in two areas; one has interpolation and the second has no interpolation. Throughout DFT, we confirm frequency character between each area. Based on this result, we make the final detection map by using differences between two areas. In other words, thereby the area which has the interpolation caused by mapping is adjusted using minimum filter for detection algorism; the second area which has no interpolation tends to different frequency character.

• Journal of the Korean Institute of Landscape Architecture
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• v.46 no.2
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• pp.1-13
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• 2018

This work discusses the major roles of digital technologies in the history of landscape architectural drawing, and offers a critique of the dominant trend towards realism in recent digital landscape representations. During the period of transition from conventional drawing tools, computer technologies generally functioned as mechanical tools to imitate prior manual techniques. Specifically, the GIS was served as a mechanical tool to efficiently process the manual layer cake; CAD software generally functioned to translate physical models to two-dimensional construction documents while graphic software generally functioned as a tool to perform processes similar to those of manual collage and montage techniques. Recent digital landscape drawings tend to adopt a realistic depiction like the painting of landscape appearance. In the representations, discernible traces of cutting and assembling are removed via graphic software; thus, the complete representations are perceived as if they were a copy of an actual landscape. The realistic images are an easy way to communicate with the public. However, it is difficult to achieve a full embodiment of all of the multisensory characteristics of a landscape through these visuals. They often deceive viewers by visualizing idealized conditions of not-yet-actualized landscapes and production of the final images takes up a large portion of the overall design process. Alternatively, 3D digital modeling of landscape performance and creative uses of digital technologies during the overall design process, as well as hybridized techniques with different drawing techniques and technologies, provide the opportunity to explore various aspects of a landscape.

• Journal of Korea Game Society
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• v.15 no.4
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• pp.111-120
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• 2015

The purpose of this study is to understand the sociocultural context of the pre-game period, and how the context influenced on the identity formation of games. Games did not develop with the fixed and stable identities. Instead, games is the outcome which is conceived in the history of articulation of various discourses, technologies and social factors. The mechanical amusement devices was consumed for the urban entertainment, and made a strained relations with the society for the speculative and pathological characteristics. The mechanical amusement has extended to the electronic games in 1970s, and reached the present digital game culture.