• Title/Summary/Keyword: profile face

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A Study on the Individual Authentication Using Facial Information For Online Lecture (가상강의에 적용을 위한 얼굴영상정보를 이용한 개인 인증 방법에 관한 연구)

  • 김동현;권중장
    • Proceedings of the IEEK Conference
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    • 2000.11c
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    • pp.117-120
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    • 2000
  • In this paper, we suggest an authentication system for online lecture using facial information and a face recognition algorithm base on relation of face. First, a facial area on complex background is detected using color information. Second, features are extracted with edge profile. Third, compare it with the value of original facial image in database. By experiments, we know that the proposed system is an useful method for online lecture authentication system.

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Enhancement of a parabolic face working accuracy using volumetric error compensation of NC milling machine (NC 밀링머신의 Volumetric 오차보상을 통한 포물면 가공의 정밀도 향상)

  • 이찬호;정을섭;이응석;김성청
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.05a
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    • pp.917-921
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    • 2000
  • One of the major limitations of productivity and quality in machining is machining accuracy of the machine tools. The machining accuracy is affected by geometric, volumetric errors of the machine tools. This paper suggests the enhancement method of machining accuracy for precision machining of high quality metal reflection mirror or optics lens, etc. In this paper, we study 1) the compensation of linear pitch error with NC controller compensation function using laser interferometer measurement, 2) the method for enhancing the accuracy of NC milling machining by modeling and compensation of volumetric error, 3) the generation of the parabolic face profile. And the method is verified by the parabolic face machining experiment with a vertical three axes NC milling machine. After this study, we will inspect using On-machine measurement and study the repetitive machining by a compensated path

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Active Shape Model with Directional Profile (방향성 프로파일을 적용한 능동형태 모델)

  • Kim, Jeong Yeop
    • Journal of Korea Multimedia Society
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    • v.20 no.11
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    • pp.1720-1728
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    • 2017
  • Active shape model is widely used in the field of image processing especially on arbitrary meaningful shape extraction from single gray level image. Cootes et. al. showed efficient detection of variable shape from image by using covariance and mean shape from learning. There are two stages of learning and testing. Hahn applied enhanced shape alignment method rather than using Cootes's rotation and scale scheme. Hahn did not modified the profile itself. In this paper, the method using directional one dimensional profile is proposed to enhance Cootes's one dimensional profile and the shape alignment algorithm of Hahn is combined. The performance of the proposed method was superior to Cootes's and Hahn's. Average landmark estimation error for each image was 27.72 pixels and 39.46 for Cootes's and 33.73 for Hahn's each.

Fluid flow profile in the "orthotropic plate+compressible viscous fluid+rigid wall" system under the action of the moving load on the plate

  • Akbarov, Surkay D.;Huseynova, Tarana V.
    • Coupled systems mechanics
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    • v.9 no.3
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    • pp.289-309
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    • 2020
  • The paper studies the fluid flow profile contained between the orthotropic plate and rigid wall under the action of the moving load on the plate and main attention is focused on the fluid velocity profile in the load moving direction. It is assumed that the plate material is orthotropic one and the fluid is viscous and barotropic compressible. The plane-strain state in the plate and the plane flow of the fluid is considered. The motion of the plate is described by utilizing the exact equations of elastodynamics for anisotropic bodies, however, the flow of the fluid by utilizing the linearized Navier-Stokes equations. For the solution of the corresponding boundary value problem, the moving coordinate system associated with the moving load is introduced, after which the exponential Fourier transformation is employed with respect to the coordinate which indicates the distance of the material points from the moving load. The exact analytical expressions for the Fourier transforms of the sought values are obtained, the originals of which are determined numerically. Presented numerical results and their analyses are focused on the question of how the moving load acting on the face plane of the plate which is not in the contact with the fluid can cause the fluid flow and what type profile has this flow along the thickness direction of the strip filled by the fluid and, finally, how this profile changes ahead and behind with the distance of the moving load.

The short-term morphological changes of the beach and dune using by terrestrial LIDAR (지상 라이다를 이용한 단기간 해빈과 해안사구의 지형변화 연구)

  • Shin, Dae Seob;Seo, Jong Cheol
    • Journal of The Geomorphological Association of Korea
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    • v.18 no.4
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    • pp.283-296
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    • 2011
  • The aim of this study is to analyze the short-term changes of beach and dune morphology at Hwajin beach, Korea using by terrestrial LIDAR. Based on ArcInfo as point cloud obtained through precise analyzing studying area twice (1st : Sep 1. 2010, 2nd : Oct 2nd. 2010) by terrestrial LIDAR, alteration of beach and dune was analyzed at DEM, of which cell size is about 10cm. Consequently, during the studying period, coastlines at studying area moved backward and reduced the area of coastal zone. In a section change, the north beach moved backward with more eroded beach face and the middle section of south beach moved forward with more deposited beach face. Considering all the section changes of beach at studying area, beach section during the 1st measurement period can be defined as a summer profile, and it can be explained that the temporary storm profile was formed by the strong wave created during studying period. As a result of analyzing the alteration of beach area by terrestrial LIDAR, alteration of narrow area was able to be analyzed in detail by class of 'centimeter' and the time was able to be shortened.

Assessment of Oral Health Impact Profile 14 for the ADL Inpatients in Geriatrics Hospital (노인요양병원 입원 ADL환자의 OHIP(Oral Health Impact Profile)14평가)

  • Kim, Jung-Sool;Lee, Byung-Ho
    • Journal of dental hygiene science
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    • v.9 no.3
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    • pp.303-310
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    • 2009
  • The purpose of this study was to evaluated for its validity and assessment of oral health impact profile 14 as a tool for evaluating of life related with oral health status for the ADL inpatients in geriatrics hospital and as a basic data for establishing geriatric oral health policies. The sample of this study consisted of 120 in ADL inpatients in geriatrics hospital in Pusan and Ulsan city, through face-to-face interviews of sample extraction method. In conclusion, the analysis results of the short OHIP14 forms have an effect on necessity of cure, filled teeth and current oral stale, spouse, intension. Through this results, OHIP14 could be used as an indicator to measure the quality of life related with oral health status for the ADL inpatients in geriatrics hospital as well as elderly general people.

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A STUDY ON THE FACIAL ESTHETIC PREFERENCES AMONG KOREAN YOUTHS: ASSESSMENT OF PROFILE PREFERENCES (한국 젊은이의 안면미 선호경향에 관한 연구 : 얼굴의 측모평가를 중심으로)

  • Song, Sejin;Choi, Ik-chan
    • The korean journal of orthodontics
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    • v.22 no.4 s.39
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    • pp.881-920
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    • 1992
  • This study was designed to assess profile preferences among Korean youths in the year 1992. Facial esthetics was evaluated by means of silhouette profiles, eliminating the influence of a number of aspects that may affect judgment when normal lateral photographs are used. The main points of preference to be clarified here are as follows. First, on facial convexity, Second, on nasion depth, Third, on mentolabial sulcus depth, Fourth, on the position of upper and lower lips, Fifth, on facial type according to Angle's classification of malocclusion, Sixth, on Song's tangents. The 54 subjects printed in questionnaire as black and white silhouettes were selected from 300 tracings from cephalometric radiographs of people whose age ranging from 11 to 20 years. Photographs of six female subjects were retouched by computer graphic software and printed in color and black/white photographs which were used for adaptation of eyes of participants in selecting profiles in silhouette. They constitute 2 questions. The 54 subjects were grouped as 22 questions, each of them composed of 6 subjects, according to the aspects to be clarified. Twenty four questions in total were asked to assess profile preferences. For the assessment, the profile line, the facial esthetic triangle, Song's tangents, and Angle's classification of malocclusion were introduced. The profile line is composed of 11 component points which are Trichion, Glabella, Nasion, Pronasale, Subnasale, Labrale superius, Stomion, Labrale inferius, Supramentale, Pogonion, and Gnathion. The facial esthetic triangle is composed of 3 tangents: A-tangent which is the tangent of dorsum of nose, B-tangent which is the line passing through Sn and Ls, and C-tangent which is drawn on the turning point of the curve which lies between mentolabial sulcus (Sm) and pogonion (Pg). Angle's classification has 3 types of malocclusion which are Class I, Class II, and Class III. Class II malocclusion is subdivided into Division 1 and Division 2. The participants of the survey were composed of 861 college students (448 male students, 413 female students) whose majors grouped as Fine Arts. Liberal Arts, and Natural Sciences, and whose mean age 21.8 years. The statistics program SPSS/PC + of SPSS Inc. was used to analyze answers of participants. Crosstabulation, Chi-square test, and Kendall test were done. The conclusions are as follows: First, Korean youths have a tendency to prefer the slightly convex face to the flat or concave face. Second, they prefer a moderately deep nasion. Third, they prefer a moderately deep mentolabial sulcus. Fourth, they prefer the position of lips which are near to Ricketts' E-line. The position of the upper lip which is slightly posterior to E-line is preferred. The upper lip which lies too far anterior or posterior to the lower lip is not perferred. Fifth, they prefer most, according to Angle's Classification of Malocclusion, Class I facial profile which has a slight inclination to Class II division 2. The order of preference is Class I, Class II division 2, Class III, and Class II division 1. Sixth, they prefer the type 2 and 3 of Song's tangents. The facial profile within which A-and B-tangent meet is preferred. The facial profile which has Cotangent that .meets with A-tangent slightly posterior to the crossing point of A-and B-tangent or that parallels with B-tangent is preferred.

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A STUDY ON PROFILE CHANGE AND STABILITY OF TREATMENT AFTER WEARING FACE MASK (상악골 전방견인 장치 사용후 측모 변화 및 안정성에 대한 연구)

  • Park, Young-Chel;Shin, Ja-Young;Yu, Hyung-Seog
    • The korean journal of orthodontics
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    • v.27 no.1
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    • pp.1-20
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    • 1997
  • Skeletal Class III malocclusions are growth-related discrepancies, and the problems are more severe until growth is complete. Causes of skeletal Class III malocclusion are classified into mandibular overgrowth, maxillary deficiency, and combination of the two. Face mask has been recommended for treatment of Class III malocclusion with maxillary deficiency in the early time of growth. Numerous experiments were performed and clinical studies have been reported on face mask ; nevertheless, studies on profile changes and stability after treatment of face mask are considered to be somewhat insufficient. The author selected 50 patients who can be checked for follow-up. They had been diagnosed as skeletal Class III malocclusion with maxillary deficiency and then treated with face mask ; the sample group was divided according to sex, treatment beginning age, palatal suture opening (intraoral appliance). For each group, changing pattern of facial profile and stability of treatment observed, and comparison with 20 Korean normal children(Angle's Class I). The following results were obtained. 1. skeletal, dental, and soft tissue measurements indicated more changes in the amounts of maxillary forward movement during face mask treatment. 2. R.P.E. group showed more significant maxillofacial changes and La-Li group showed more dental changes. 3. Growth changes of maxilla induced in the treatment group during wearing face mask were much more than those of normal group. 4. Growth changes of maxilla in the treatment group after treatment of face mask were less than those of normal group. From the obtained aata, it can be concluded that there was a stimulative effect on forward growth of maxilla during the use of face mask ; however, on removal of face mask, the stimulative effect was eliminated and undergrowth tendency of maxilla resumed.

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Effect of Coning Combinations on Working Performances of Wavy Mechanical Face Seal (코닝 조합이 물결 프로파일이 가공된 미케니컬 페이스 실의 작동 성능에 미치는 영향)

  • Kim, Dong-Wook;Jin, Sung-Sik;Kim, Jun-Ho;Kim, Kyung-Woong
    • Tribology and Lubricants
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    • v.28 no.2
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    • pp.70-80
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    • 2012
  • Non-contact type mechanical face seals installed in mechanical systems prevent leakage of working fluid using thin working fluid film between stator and rotor. For that purpose, various kinds of surface profiles, grooves and conings have been applied on seal surfaces of stator and rotor to generate hydrodynamic and hydrostatic pressure. The thickness distribution of working fluid film is one of important factors which affect the working performances of mechanical face seal, and it is strongly affected by the surface height profiles of stator and rotor. Therefore, appropriate design of surface height profiles of stator and rotor is necessary to optimize the working performances and life of mechanical face seal. In this study, numerical analysis using finite volume method was conducted to estimate the working performances of wavy mechanical face seals which have 36 coning combinations. As results, minimum thickness of working fluid film, leakage volume of working fluid and friction torque in static equilibrium condition of mechanical face seal, and stiffness of working fluid film were obtained. The results show that the working performances of mechanical face seal were affected by the coning combinations which can change the thickness distribution of working fluid film and pressure distribution in sealing region of mechanical face seal.

3-D Profile Measurement System of Live Human Faces for the '93 Taejon Expo Kumdori Robot Scupltor (93 대전엑스포 꿈돌이 조각가로보트의 인물형상 측정시스템)

  • 김승우;박현구;김문상
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.19 no.3
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    • pp.670-679
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    • 1995
  • This paper presents the 3-D profile measurement system of live human faces, which was developed specially for 'KUMDORI sculptor robot' of the '93 Taejon Exposition. '93 Taejon EXPO. The basic principle for measurement adopts the slit beam projection which is a method of measuring 3-D surface profiles using geometric optics between the slit beam and the CCD camera. Since the slit beam projection consumes long measuring time, it is unfit to measure the 3-D profiles of living objects as human. Therefore, the projection type slit beam method which consumes short measuring time is newly suggested. And an algorithm to reconstruct the 3-D profile from the deformed images using finite approximated calibration is suggested and practically implemented. The projection type slit beam method was applied to spectators in a period of '93 Taejon EXPO. The measurement results show that the technique is suitable for 3-D face profile measurement on a living body.