• Electronics and Telecommunications Trends
• /
• v.26 no.2
• /
• pp.61-74
• /
• 2011

증강현실은 1960년대 중반부터 시작된 기술이지만 그동안은 제한된 범위의 응용을 중심으로 고성능 고정 단말 상에서 기능을 구현하여 왔다. 그러나 최근 5년 사이 카메라와 GPS 등의 다양한 센서를 내장한 모바일 단말과 스마트폰의 보급이 확산이 되고, 빠른 모바일 인터넷을 이용한 인터넷서비스들과 융합된 다양한 기능들이 선보이면서, 모바일 증강현실 분야는 급속히 확산되고 있다. 초기의 증강현실 서비스는 가상객체를 효과적으로 보여주기 위한 관점이었다면, 최근의 모바일 증강현실 서비스들은 다양한 인터넷 서비스와 정보들을 효과적으로 브라우징하거나 센서 정보 등을 기반으로 모바일 단말을 이용해 편리한 증강 인터페이스를 사용하도록 하는 것에 보다 많은 초점을 맞추고 있다. 본 고에서는 이러한 모바일 증강현실 기술 동향과 관련 표준화 동향을 고찰함으로써 미래 모바일 증강현실 기술의 진화 방향과 그 의미를 살피고자 하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2011.10a
• /
• pp.195-196
• /
• 2011

휴대기기의 사용자 인터페이스는 사용자의 편의성에 맞춰 끊임없이 발전해 왔다. 현대의 휴대기기는 각종 센서와 다양한 기능을 이용하여 보다 확장된 서비스를 제공하며 이와 관련한 연구개발도 지속적으로 진행되고 있으며 이 분야는 지속적으로 연구개발 되어야한다. 따라서 본 연구에서는 스마트 기기의 내장된 카메라를 이용하여 3차원으로 구성된 객체를 관측하는 관측점을 제어하여 실제로 3차원 화면을 구성하는 방법을 제안하며 이를 이용해 애플리케이션의 확장된 서비스 개발에 초석을 다지는 연구개발을 목표로 하고 있다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2003.10b
• /
• pp.430-432
• /
• 2003

카메라를 내장한 휴대용 단말기의 보급과 인터넷 및 무선 네트워크의 급속한 확산으로 유비쿼터스 컴퓨팅 환경을 구체화한 새로운 서비스들이 등장하고 있다. 본 논문에서는 4개 분야의 학제간 공동연구를 통해 기존 PC 기반의 인터넷 컴퓨팅 환경에서 적용하기 어려웠던 U-Campus 서비스를 제안한다. 이는 UTOPIA 프로젝트의 일부로서 휴대용 단말기와 이미지 기반 센서인 컬러코드를 이용한 유비쿼터스 컴퓨팅형 캠퍼스 서비스이다. 현재 테스트 베드를 구축하고 U-Profile. U-Messaging 및 U-Campus Tour Guide 서비스를 제공하고 있다. 학생. 교수. 교직원 및 학교 방문자들은 U-Campus환경 하에서 다양한 정보를 PDA, 휴대전화, 스마트폰 등 휴대용 단말기를 통해서 언제, 어디서나 자연스럽게 제공 받을 수 있다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2018.10a
• /
• pp.144-146
• /
• 2018

새로운 회사, 학교에 면접을 보러가는 사람이나 신규 건물 이용자들은 그러한 복잡한 건물을 이용하기 힘들다. 이러한 문제들을 상호작용 가능한 증강현실 어플리케이션을 해결한다. 본 논문의 어플리케이션은 스마트폰의 내장 GPS와 자이로스코프, 카메라를 이용하여 최종도착지 건물의 위치와 정보를 확인 할 수 있고, 그 과정에서 증강현실 기술을 이용하여 사용자에게 효율적이고 직관적인 서비스를 제공한다.

• Journal of the Institute of Electronics Engineers of Korea SP
• /
• v.43 no.2 s.308
• /
• pp.19-29
• /
• 2006

As the security of personal information is becoming more important in mobile phones, we are starting to apply iris recognition technology to these devices. In conventional iris recognition, magnified iris images are required. For that, it has been necessary to use large magnified zoom & focus lens camera to capture images, but due to the requirement about low size and cost of mobile phones, the zoom & focus lens are difficult to be used. However, with rapid developments and multimedia convergence trends in mobile phones, more and more companies have built mega-pixel cameras into their mobile phones. These devices make it possible to capture a magnified iris image without zoom & focus lens. Although facial images are captured far away from the user using a mega-pixel camera, the captured iris region possesses sufficient pixel information for iris recognition. However, in this case, the eye region should be detected for accurate iris recognition in facial images. So, we propose a new fast iris detection method, which is appropriate for mobile phones based on corneal specular reflection. To detect specular reflection robustly, we propose the theoretical background of estimating the size and brightness of specular reflection based on eye, camera and illuminator models. In addition, we use the successive On/Off scheme of the illuminator to detect the optical/motion blurring and sunlight effect on input image. Experimental results show that total processing time(detecting iris region) is on average 65ms on a Samsung SCH-S2300 (with 150MHz ARM 9 CPU) mobile phone. The rate of correct iris detection is 99% (about indoor images) and 98.5% (about outdoor images).

• Journal of the Institute of Electronics Engineers of Korea SP
• /
• v.44 no.4 s.316
• /
• pp.35-43
• /
• 2007

With the current trend of digital convergence in mobile phone, imaging devices such as cameras, displays and beam-projectors have been made smaller and become into mobile phones. Especially, built-in beam-projectors (we call it mobile beam-projector hereafter) have been developed to overcome small screen size of mobile display and to provide the realistic image while watching movies or broadcasting. However, mobile beam-projector can project an original image on various colored-screen, different from general data projector with white screen, thereby degrading the image quality of projected images. Therefore, this paper proposed a method of correcting projected images on colored-screens by adapting color constancy theory that has been mainly used for illumination estimation.

• Journal of Korea Society of Industrial Information Systems
• /
• v.15 no.5
• /
• pp.119-124
• /
• 2010

In this paper planed mobile shopping system using MVLS. MVLS is based on braille system, and list this to a square color box. This is can accomplish convenience of use and encipherment of fundamental personal information. Also, this system has advantage to fast communication speed because that has little size packets. Planed system does and fit this in shopping to graft together mobile-phone, smart-phone and tablet-pc that the such MVLS and most of internal adult are possessing. User can more fast finish shopping just photographing and press the button that show on TV or PC monitor and printed materials etc. by camera of mobile phone.

• Archives of design research
• /
• v.17 no.3
• /
• pp.441-448
• /
• 2004

Mobile devices such as mobile phones or PDAs are considered as main interlace tools in ubiquitous computing environment. For searching information in mobile device, it should be possible for user to input some text as well as to control cursor for navigation. So, we should find efficient interlace method for text input in limited dimension of mobile devices. This study intends to suggest a new approach to mobile interaction using camera based virtual keyboard for text input in mobile devices. We developed a camera based virtual keyboard prototype using a PC camera and a small size LCD display. User can move the prototype in the air to control the cursor over keyboard layout in screen and input text by pressing a button. The new interaction method in this study is evaluated as competitive compared to mobile phone keypad in left input efficiency. And the new method can be operated by one hand and make it possible to design smaller device by eliminating keyboard part. The new interaction method can be applied to text input method for mobile devices requiring especially small dimension. And this method can be modified to selection and navigation method for wireless internet contents on small screen devices.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.18 no.6
• /
• pp.1379-1386
• /
• 2023

In this paper, research was conducted to prevent various safety accidents that may occur from infant carriages carrying children and to make the use of infant carriages easier. In order to prevent the baby car from running without protection, a brake function is installed on the baby car wheels using a pressure sensor and a servo motor. Then, a pressure sensor and LCD are used to determine whether the seat belt is fastened to prevent the child from falling out of the baby car. In addition, it was designed to use LCD and LED to turn on a warning light when the temperature and humidity exceed a certain level, so that infants can be in a comfortable environment when using the baby car.

• Journal of the Korea Society of Computer and Information
• /
• v.16 no.3
• /
• pp.229-236
• /
• 2011

In this paper we present light weighted English-to-Korean and Korean-to-English mobile translators on smart phones. For natural translation and higher translation quality, translation engines are hybridized with Translation Memory (TM) and Rule-based translation engine. In order to maximize the usability of the system, we combined an Optical Character Recognition (OCR) engine and Text-to-Speech (TTS) engine as a Front-End and Back-end of the mobile translators. With the BLEU and NIST evaluation metrics, the experimental results show our E-K and K-E mobile translation equality reach 72.4% and 77.7% of Google translators, respectively. This shows the quality of our mobile translators almost reaches the that of server-based machine translation to show its commercial usefulness.