• Journal of Digital Contents Society
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• v.19 no.6
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• pp.1027-1032
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• 2018

Recently, new content for e-leisure, including e-sports and e-games, has become necessary. To meet this requirement, e-leisure mobile AR studies which track human are underway. The tracking performance at long distances is important because e-leisure mobile AR is used in outdoor environments. However, conventional mobile AR applications such as SNOW and Snapchat have the disadvantage of low tracking performance at long distances. Therefore, we propose an e-leisure mobile AR in outdoor environments. The proposed e-leisure mobile AR can estimate the position of the head in outdoor environments at long distances by using color markers and the human body ratio, and then augment a virtual object at the estimated position. The performance of the proposed e-leisure mobile AR was evaluated by measuring the tracking performance and processing time.

• The Journal of the Korea institute of electronic communication sciences
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• v.12 no.5
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• pp.923-932
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• 2017

In this paper, we propose a GRNN(: Generalized Regression Neural Network) algorithms for new eyes and face recognition identification system to solve the points that need corrective action in accordance with the existing problems of facial movements gaze upon it difficult to identify the user and. Using a Kalman filter structural information elements of a face feature to determine the authenticity of the face was estimated future location using the location information of the current head and the treatment time is relatively fast horizontal and vertical elements of the face using a histogram analysis the detected. And the light obtained by configuring the infrared illuminator pupil effects in real-time detection of the pupil, the pupil tracking was to extract the text print vector. The abstract is to be in fully-justified italicized text as it is here, below the author information.

• The KIPS Transactions:PartB
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• v.10B no.4
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• pp.465-472
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• 2003

For an effective pre-treatment process of a face input image, it is necessary to detect each of face components, calculate the face area, and estimate the rotary angle of the face. A proposed method of this study can estimate an robust result under such renditions as some different levels of illumination, variable fate sizes, fate rotation angels, and background color similar to skin color of the face. The first step of the proposed method detects the estimated face area that can be calculated by both adapted skin color Information of the band-wide HSV color coordinate converted from RGB coordinate, and skin color Information using histogram. Using the results of the former processes, we can detect a lip area within an estimated face area. After estimating a rotary angle slope of the lip area along the X axis, the method determines the face shape based on face information. After detecting eyes in face area by matching a partial template which is made with both eyes, we can estimate Y axis rotary angle by calculating the eye´s locations in three dimensional space in the reference of the face area. As a result of the experiment on various face images, the effectuality of proposed algorithm was verified.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.34 no.5
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• pp.81-87
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• 2006

In this paper, an experimental optical head tracker system is designed and constructed. The system is composed of the infrared LEDs and two infrared CCD cameras to filter out the interference of another light in the limited environment like the cockpit. Then the optical head tracker algorithm is designed by using the feature detection algorithm and the 3D motion estimation algorithm. The feature detection algorithm, used to obtain the 2D position coordinates of the features on the image plane, is implemented by using the thresholding and the masking techniques. The 3D motion estimation algorithm which estimates the motion of a pilot's head is implemented by using the extended Kalman filter (EKF). Also, we used the precise rate table to verify the performance of the experimental optical head tracker system and compared the rotational performance of this system with the inertial sensor.

• Journal of Korea Society of Industrial Information Systems
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• v.24 no.5
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• pp.129-137
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• 2019

Ubiquitous computing technology is emerging as information technology advances. In line with this, a number of studies are being carried out to increase device miniaturization and user convenience. Some of the proposed devices are user-friendly and uncomfortable with hand-held operation. To address these inconveniences, this paper proposed a virtual button that could be used in watching television. When watching a video on television, a camera is installed at the top of the TV, using the fact that the user watches the video from the front, so that the camera takes a picture of the top of the head. Extract the background and hand area separately from the filmed image, extract the outline to the extracted hand area, and detect the tip point of the finger. Detection of the end point of the finger produces a virtual button interface at the top of the image being filmed in front, and the button activates when the end point of the detected finger becomes a pointer and is located inside the button.

• Journal of the Korean Society of Physical Medicine
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• v.8 no.3
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• pp.337-342
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• 2013

PURPOSE: The Unilateral neglect is characterized by difficulty shifting attention to the side of space opposite the brain lesion and frequently reducing use of contralesional extremities. This study was to identify whether the visual deprivation was responsible for head position on unilateral neglect patient after stroke. METHODS: A patient with left middle cerebral artery infarction participated in the study. We assessed neglect using line bisection and star cancellation test. Patient was instructed to maintain correct alignment of trunk and head in a sit position. We evaluated degree of head lateral tilting and rotation. Then, patient was blocked visual input. Also, we evaluated head position in the same way. RESULTS: He scored 3 points in the line bisection test and 9 points star cancellation test. In postural evaluation, he had deviated posture such as lateral head tilting and rotation. After visual cue deprivation, patient showed different head position which was decreased degree of head tilting and rotation. CONCLUSION: For vertical body orientation, it was used multiple sensory references including the vestibular, somatosensory, and visual system. This finding suggested that abnormal posture of neglect patient could be related to the visual input. It has important clinical implications in terms of understanding the neglect.

• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.513-518
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• 2006

본 논문에서는 특별한 스튜디오 조명이 아닌 가정용 혹은 학교용 조명 하에서 동작하는 감정 표현이 가능한 그림자 놀이 도구를 소개한다. 이 놀이는 사용자의 실사로부터 추출된 가상 그림자에 사용자의 동작에 따라 실시간으로 반응하는 가상 표정 애니메이션 캐릭터를 투영한다. 이 놀이 도구는 행위전시 등의 공연 환경뿐만 아니라 가정, 학교 등의 일상 환경에서도 동작이 가능하도록 설계되었다. 따라서 가장 일반적인 조명의 하나인 가정용 형광등과 백열등 환경을 가정하였고, 배경에 대해서는 어떤 제약도 가정하지 않았다. 사용자의 실사를 구분하는 과정에는 배경 차분화 기법을 사용하였고, 빛의 산란 및 실제 그림자의 영향 등으로 인한 잡음을 최소화하기 위해 몇 가지 잡음 제거 알고리즘을 결합하여 적용하였다. 이 도구에서 가상 그림자의 표정 애니메이션은 사용자의 손동작에 따라 변화하며, 손동작 및 머리 위치의 추적을 위해 새로이 고안한 자질 기반 추적 기법을 적용하였다. 이 도구는 공연장에서의 인터렉티브 미디어 아트 전시 또는 공연, 아동 대상의 미술 교육, 예술치료 등의 분야에 활용될 수 있을 것으로 판단된다.

• Proceedings of the KIEE Conference
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• 2006.07d
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• pp.1979-1980
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• 2006

최근 인간과 유사한 휴머노이드에 대한 연구가 상당히 활발하고 그 영역이 계속해서 확대되고 있는 추세다. 휴머노이드에는 로봇의 몸체 뿐 아니라 머리 부분, 특히 시각 시스템이 매우 중요하다. 본 논문에서는 생리학적인 측면에서 인간의 눈과 목의 운동을 관찰하여 휴머노이드에 적용 가능한 능동 시각 시스템의 기구부 설계 방법을 제안하고 제어 방식을 설명한다. 기존의 팬-틸트 방식의 시각 시스템에 없는 인공 안구의 롤 회전 기능을 추가함으로써, 사람의 시각 시스템과 거의 유사한 동작 영역과 동작 속도를 보이게 된다. 소형 비전센서 모듈을 사용함으로써 시스템의 크기가 줄고 경량화 되었다. DC 모터를 엑츄에이터로 사용함으로써, 위치와 속도 제어가 가능하고, 인간 안구의 단속적 운동을 모사 할 수 있다.

• Research in Plant Disease
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• v.7 no.1
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• pp.49-55
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• 2001

Species and races of root-knot nematodes in greenhouses in southern Korea were investigated and a simple identification scheme was provided. Among 23 populations of root-knot nematodes, Meloidogyne arenaria race 2 was 59%, M. incognita race 1 was 23%, and an unknown race of M. incognita was 18%. Total length of M. arenaria juveniles was 411㎛(306-503㎛) and that of M. incognita was 384㎛(312-488㎛); however, the ranges of two species were overlapped and could not be used to distinguish the two species. Excretory pore in female head was a consistent character to differentiate M. arenaria and M. incognita.

• Korean Journal of Ichthyology
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• v.10 no.2
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• pp.250-259
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• 1998

This study was carried out to reveal the taxonomic status of the two mullets, Chelon affinis and Chelon haematocheilus from Korea by comparison of their morphological characteristics. Chelan affinis, occurred in the southern coastal area, is a distinct species characterized by having a keel on the middorsal line in front of the spinous dorsal fin. However, Chelon haematocheilus, found in the all coastal areas of Korea excluding Cheju island is easily distinguished from the former in having the deep flat head. By comparison of five groups of Chelan haematocheilus, Kunsan group is slightly differed from others in the height of anal fin and caudal peduncle length. Although Chelon affinis is similar with Chelan haematocheilus in the view of meristic characters, they are distinguished from each other in the number of pyloric caeca and lateral line scales.