• 제목/요약/키워드: Facial analysis

검색결과 1,118건 처리시간 0.023초

악안면 기형의 상하악골 전후방적 위치관계에 대한 McNamara Analysis와 Delaire Analysis의 기준선 비교연구 (Comparative Analysis of the Reference Lines on McNamara's and Delaire's Analyses for the Anterior and Posterior Facial Relationship of Maxillofacial Deformity)

  • 정승원;김소미;변성수;박형식;정영수
    • Maxillofacial Plastic and Reconstructive Surgery
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    • 제33권4호
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    • pp.331-336
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    • 2011
  • Purpose: McNamara and Delaire analyses are two commonly used analytic methods, yet, they differ in their theoretic concepts and different reference lines are used for ideal surgical prediction. Therefore, the use of different analytic methods may result in different surgical plans. The purpose of this study was to compare the anterior and posterior relationship of the maxilla and mandible by using McNamara and Delaire analysis. Methods: 30 Korean patients (15 male and 15 female) who had visited the Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, for dentofacial evaluation were studied by using McNamara's and Delaire's analyses. Results: On the maxillary analysis, 26 out of 30 patients (86.7%) were in accordance. On the mandibular analysis, 20 out of 30 patients (66.7%) were in accordance. On the maxillary analysis, McNamara's analysis showed an average of 0.36 mm greater amount of prognathism compared to Delaire's analysis, and this was not statistically significant. On the mandibular analysis, McNamara's analysis showed an average of 6.03 mm greater amount of prognathism compared to Delaire's analysis, and this was statistically significant. On the mandibular analysis, 26 out of 30 patients (86.7%) showed a greater amount of prognathism on McNamara's analysis compared to that of Delaire's analysis. The remaining 4 patients (13.3%) showed the same amount of prognathism on both analyses. Conclusion: These results may serve as a reference for surgeons when determining which analytic method is to be used for optimal surgical results.

이질적 얼굴인식을 위한 심층 정준상관분석을 이용한 지역적 얼굴 특징 학습 방법 (Local Feature Learning using Deep Canonical Correlation Analysis for Heterogeneous Face Recognition)

  • 최여름;김형일;노용만
    • 한국멀티미디어학회논문지
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    • 제19권5호
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    • pp.848-855
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    • 2016
  • Face recognition has received a great deal of attention for the wide range of applications in real-world scenario. In this scenario, mismatches (so called heterogeneity) in terms of resolution and illumination between gallery and test face images are inevitable due to the different capturing conditions. In order to deal with the mismatch problem, we propose a local feature learning method using deep canonical correlation analysis (DCCA) for heterogeneous face recognition. By the DCCA, we can effectively reduce the mismatch between the gallery and the test face images. Furthermore, the proposed local feature learned by the DCCA is able to enhance the discriminative power by using facial local structure information. Through the experiments on two different scenarios (i.e., matching near-infrared to visible face images and matching low-resolution to high-resolution face images), we could validate the effectiveness of the proposed method in terms of recognition accuracy using publicly available databases.

Energy-Efficient Biometrics-Based Remote User Authentication for Mobile Multimedia IoT Application

  • Lee, Sungju;Sa, Jaewon;Cho, Hyeonjoong;Park, Daihee
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제11권12호
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    • pp.6152-6168
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    • 2017
  • Recently, the biometric-based authentication systems such as FIDO (Fast Identity Online) are increased in mobile computing environments. The biometric-based authentication systems are performed on the mobile devices with the battery, the improving energy efficiency is important issue. In the case, the size of images (i.e., face, fingerprint, iris, and etc.) affects both recognition accuracy and energy consumption, and hence the tradeoff analysis between the both recognition accuracy and energy consumption is necessary. In this paper, we propose an energy-efficient way to authenticate based on biometric information with tradeoff analysis between the both recognition accuracy and energy consumption in multimedia IoT (Internet of Things) transmission environments. We select the facial information among biometric information, and especially consider the multicore-based mobile devices. Based on our experimental results, we prove that the proposed approach can enhance the energy efficiency of GABOR+LBP+GRAY VALUE, GABOR+LBP, GABOR, and LBP by factors of 6.8, 3.6, 3.6, and 2.4 over the baseline, respectively, while satisfying user's face recognition accuracy.

공간 제약 특성과 WPA를 이용한 얼굴 영역 검출 및 검증 방법 (Face Region Detection and Verification using both WPA and Spatially Restricted Statistic)

  • 송호근
    • 한국정보통신학회논문지
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    • 제10권3호
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    • pp.542-548
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    • 2006
  • 본 논문에서는 컬러 정지 영상을 대상으로 상반신 인물 영상이 입력되었을 때, 얼굴 영역을 추출하고 검증하는 방법을 제안한다. 본 논문의 얼굴 추출과정은 1단계로 영상 내 피부색 영역을 추출한 다음, 후보 영역들에 대한 공간적 제한조건을 이용하여 1차 얼굴 후보 영역을 결정한다. 2단계에서는 얼굴 구성 요소 중 가장 두드러진 특징으로서 눈 영역을 탐색하고, 눈 영역을 기준으로 한국인의 얼굴에 대한 구조적 통계값을 적용한다. 이로서 얼굴 포함 최소 사각형 후보 영역을 결정한다. 마지막 3단계에서는 영상 내 색상 정보와 공간 정보 그리고 구조적 통계치로부터 결정된 얼굴 후보 영역에 대하여 얼굴 영역의 텍스춰(texture)를 Wavelet Packet Analysis를 이 용해 조사함으로써 얼굴 영역을 확정하게 된다.

화장색 이미지평가와 선호도 차이 (제2보) -지각자의 연령과 거주지를 중심으로- (A Differences in Preference and Evaluation on the Image of Make-up (Part II) -Focused on Perceiver's Age & Habitant-)

  • 이연희
    • 한국의류학회지
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    • 제30권5호
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    • pp.684-698
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    • 2006
  • This study consists of the stimuli of a female model in her twenties with twenty-two different facial make-up. The subjects of this study are one thousand low hundred ninety seven purposive sampled-male and female grown-ups throughout the country. The period of the research was the December of 2004, one month, and the materials were analyzed by factor analysis, T-examination, analysis of variance, Cronbach's a, Duncan's Multiple Range Test. Here follows the result of the research. Firstly, Familiarity, Intelligence, Fitness, Charm, Tradition and Youth were came out as the result of factor analysis of make-up color image perception. Secondly, in age/lip color perception of bright skin tone, there was difference of Intelligence and Charm. In age/image make-up perception of bright skin tone, there was difference of Familiarity, Charm especially on Cool image make-up. Thirdly in habitant/lip color perception of dark skin tone, there was difference of Intelligence and Charm. In habitant/image make-up perception of bright skin tone, there was difference of Familiarity, Charm and of bright skin tone, Intelligence, Charm, Tradition and Youth. Fourthly, there were the interaction effects on the gender of perceivers and lip color and image make-up of perceivers habitant. Lastly, in preference rate, lip color was more affected by age and image make-up were more affected by perceivers habitant.

얼굴의 물리적 특성과 성격인상 (Physical Features of Faces and Personal Personality Impression)

  • 조경덕
    • 감성과학
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    • 제7권2호
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    • pp.195-201
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    • 2004
  • 본 연구에서는 얼굴의 물리적 특성과 얼굴의 성격인상과의 관계에 대하여 검토하였다. 피험자들에게는 일본인 남녀의 정지화면이 제시되었다. 피험자는 31개의 성격특성 항목에 대하여 7점 척도를 사용한 평가를 실시하였다. 요인 분석의 결과 $\ulcorner$사회적 바람직성$\lrcorner$, $\ulcorner$활동성$\lrcorner$, $\ulcorner$지성$\lrcorner$의 3요인이 추출되었다. 각각의 사진 자극에 대하여 얼굴 부분의 물리적 특성과 각 요인 득점과의 관계를 조사한 결과 남성의 얼굴에서는 눈에 대한 특징 지표와 $\ulcorner$지성$\lrcorner$ 요인이 여성의 얼굴에서는 뺨에 대한 지표와 $\ulcorner$지성$\lrcorner$ 요인, $\ulcorner$사회적 바람직성$\lrcorner$ 요인이 관계가 있었다. 이러한 결과는 얼굴의 성격인상 평가에는 그 얼굴이 남성인가 여성인가에 의해, 혹은 피험자의 성별에 의해 판단의 기초가 되는 특징이 상이함을 시사하고 있다.

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체르노프 페이스를 사용한 광역자치단체 공공도서관 운영 및 이용 분석 (Analysis of Public Library Operations and Uses of 16 Metropolitan Local Governments of Korea by Using the Chernoff Face Method)

  • 김영석
    • 한국문헌정보학회지
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    • 제51권1호
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    • pp.271-287
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    • 2017
  • 본 연구는 체르노프 페이스 방법을 사용하여 우리나라 16개 광역자치단체의 공공도서관 운영 및 이용을 분석하는데 그 목적이 있다. 체르노프 페이스를 사용한 본 연구는 문헌정보학 분야에서는 처음으로 시도되었다. 설문조사 결과에 근거하여 얼굴의 어떤 부위로 어떤 데이터를 표현할 것인가를 결정하였다. 분석 결과 8개 조사 대상 분야에서 거의 모든 영역에 걸쳐 대체로 광역자치도가 광역시보다 도서관 운영 및 이용에서 우수하였다. 즉, 광역자치도는 광역시보다 더 많은 도서관을 운영하고 있고, 더 많은 장서를 가지고 있고, 더 많은 예산과 직원을 투입하고 있다. 그리고 이러한 운영 결과는 더 많은 이용자들의 도서관 자료실 이용과 자료 대출로 이어진 것으로 보인다.

Study on hair dryer thermal vibration massage to make shaving more comfortable

  • Tian, Zhixing;You, Kwang-Bock;Bae, Myung-Jin
    • International Journal of Advanced Culture Technology
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    • 제9권2호
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    • pp.123-129
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    • 2021
  • When shaving, it is easy to suffer shaving burns, that is, facial burn irritation during shaving. The reason is that the razor blade irritates the skin. The current solution is to make the razor sharper and use a razor with a blade heating function. Although these ways can increase the comfort of shaving, they will also greatly increase shaving costs. This paper proposes using a hairdryer to massage the skin before shaving to reduce skin irritation during shaving. This is a simple, practical and low-cost method. The hair dryer's heat, sound, and wind energy have a massage effect, and they can make shaving easier and more comfortable. For analyzing shaving effect, two evaluation methods are used, which are sound spectrum analysis and mos. The sound spectrum analysis is used to analyze the working status of the razor objectively. The MOS test can reflect the subjective feelings of the subject on the shaving's comfort. The results show that the hairdryer thermal vibration massage can make the beard easier to cut, thereby reducing the irritation of the razor to the skin and improving shaving comfort.

A New Anchor Shot Detection System for News Video Indexing

  • Lee, Han-Sung;Im, Young-Hee;Park, Joo-Young;Park, Dai-Hee
    • 한국지능시스템학회:학술대회논문집
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    • 한국지능시스템학회 2007년도 추계학술대회 학술발표 논문집
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    • pp.217-220
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    • 2007
  • In this paper, we present a new anchor shot detection system which is a core step of the preprocessing process for the news video analysis. The proposed system is composed of four modules and operates sequentially: 1) skin color detection module for reducing the candidate face regions; 2) face detection module for finding the key-frames with a facial data; 3) vector representation module for the key-frame images using a non-negative matrix factorization; 4) anchor shot detection module using a support vector data description. According to our computer experiments, the proposed system shows not only the comparable accuracy to the recent other results, but also more faster detection rate than others.

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양악치조성전돌의 교정치험예 (A CASE REPORT OF ORTHODONTIC TREATMENT OF BIALVEOLAR PROTRUSION)

  • 이병태;장영일;서정훈
    • 대한치과의사협회지
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    • 제15권3호
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    • pp.199-204
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    • 1977
  • The patient, 19 years old female, complained of protrusion of upper and lower anterior teeth. Teeth lining was good except slight crowding in lower anterior teeth. Teeth lining was good except slight crowding in lower incisors, but distocclusion in the region of right buccal segment was present. Cephalometric analysis revealed normal relation between maxilla and cranial base. The labial inclination of upper and lower anterior teeth was severe, so diagnosed as bialveolar protrusion case. She was treated by means of multibanded system under the extraction of four first bicuspids. After 1 year and 4 months. She gained good interdigitation of buccal segments and attractive facial profile because the labioversion of incisors was reduced properly.

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