• Title/Summary/Keyword: Facial analysis

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A Study On The Facial Recognition System Using Principle Component Analysis (주성분 분석을 이용한 얼굴인식 연구)

  • 이성록;박윤경;조창석
    • Proceedings of the Korea Multimedia Society Conference
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    • 2003.11a
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    • pp.302-305
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    • 2003
  • 카메라를 이용하여 얼굴을 인식하는 방법은 현재까지 털러 가지 접근 방법들이 제시되어 왔지만, 제약 조건 없고 안정적인 인식 방법은 아직 도출되지 않은 상태이다. 본 연구에서는 얼굴영역을 몇 개의 주성분 변수로 변환하여 영상의 명암, 얼굴위치와 무관하게 얼굴의 영역을 추출할 수 있는 시스템을 연구하였고, 10명 이내의 소규모 집단과 실내 환경을 전제 조건으로 하여 응용하였다.

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An Automatic Smile Analysis System for Smile Self-training (자가 미소 훈련을 위한 자동 미소 분석 시스템)

  • Song, Won-Chang;Kang, Sun-Kyung;Jung, Tae-Sung
    • Journal of Korea Multimedia Society
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    • v.14 no.11
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    • pp.1373-1382
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    • 2011
  • In this study, we propose an automated smile analysis system for self smile training. The proposed system detects the face area from the input image with the AdaBoost algorithm, followed by identifying facial features based on the face shape model generated by using an ASM(active shpae model). Once facial features are identified, the lip line and teeth area necessary for smile analysis are detected. It is necessary to judge the relationship between the lip line and teeth for smiling degree analysis, and to this end, the second differentiation of the teeth image is carried out, and then individual the teeth areas are identified by means of histogram projection on the vertical axis and horizontal axis. An analysis of the lip line and individual the teeth areas allows for an automated analysis of smiling degree of users, enabling users to check their smiling degree on a real time basis. The developed system in this study exhibited an error of 8.6% or below, compared to previous smile analysis results released by dental clinics for smile training, and it is expected to be used directly by users for smile training.

Video Analysis System for Action and Emotion Detection by Object with Hierarchical Clustering based Re-ID (계층적 군집화 기반 Re-ID를 활용한 객체별 행동 및 표정 검출용 영상 분석 시스템)

  • Lee, Sang-Hyun;Yang, Seong-Hun;Oh, Seung-Jin;Kang, Jinbeom
    • Journal of Intelligence and Information Systems
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    • v.28 no.1
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    • pp.89-106
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    • 2022
  • Recently, the amount of video data collected from smartphones, CCTVs, black boxes, and high-definition cameras has increased rapidly. According to the increasing video data, the requirements for analysis and utilization are increasing. Due to the lack of skilled manpower to analyze videos in many industries, machine learning and artificial intelligence are actively used to assist manpower. In this situation, the demand for various computer vision technologies such as object detection and tracking, action detection, emotion detection, and Re-ID also increased rapidly. However, the object detection and tracking technology has many difficulties that degrade performance, such as re-appearance after the object's departure from the video recording location, and occlusion. Accordingly, action and emotion detection models based on object detection and tracking models also have difficulties in extracting data for each object. In addition, deep learning architectures consist of various models suffer from performance degradation due to bottlenects and lack of optimization. In this study, we propose an video analysis system consists of YOLOv5 based DeepSORT object tracking model, SlowFast based action recognition model, Torchreid based Re-ID model, and AWS Rekognition which is emotion recognition service. Proposed model uses single-linkage hierarchical clustering based Re-ID and some processing method which maximize hardware throughput. It has higher accuracy than the performance of the re-identification model using simple metrics, near real-time processing performance, and prevents tracking failure due to object departure and re-emergence, occlusion, etc. By continuously linking the action and facial emotion detection results of each object to the same object, it is possible to efficiently analyze videos. The re-identification model extracts a feature vector from the bounding box of object image detected by the object tracking model for each frame, and applies the single-linkage hierarchical clustering from the past frame using the extracted feature vectors to identify the same object that failed to track. Through the above process, it is possible to re-track the same object that has failed to tracking in the case of re-appearance or occlusion after leaving the video location. As a result, action and facial emotion detection results of the newly recognized object due to the tracking fails can be linked to those of the object that appeared in the past. On the other hand, as a way to improve processing performance, we introduce Bounding Box Queue by Object and Feature Queue method that can reduce RAM memory requirements while maximizing GPU memory throughput. Also we introduce the IoF(Intersection over Face) algorithm that allows facial emotion recognized through AWS Rekognition to be linked with object tracking information. The academic significance of this study is that the two-stage re-identification model can have real-time performance even in a high-cost environment that performs action and facial emotion detection according to processing techniques without reducing the accuracy by using simple metrics to achieve real-time performance. The practical implication of this study is that in various industrial fields that require action and facial emotion detection but have many difficulties due to the fails in object tracking can analyze videos effectively through proposed model. Proposed model which has high accuracy of retrace and processing performance can be used in various fields such as intelligent monitoring, observation services and behavioral or psychological analysis services where the integration of tracking information and extracted metadata creates greate industrial and business value. In the future, in order to measure the object tracking performance more precisely, there is a need to conduct an experiment using the MOT Challenge dataset, which is data used by many international conferences. We will investigate the problem that the IoF algorithm cannot solve to develop an additional complementary algorithm. In addition, we plan to conduct additional research to apply this model to various fields' dataset related to intelligent video analysis.

Contemporary Diagnosis and Orthodontic Treatment in Orthognathic Surgery (임상가를 위한 특집 3 - 악교정 수술환자의 진단과 교정치료)

  • Baik, Hyoung-Seon
    • The Journal of the Korean dental association
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    • v.50 no.2
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    • pp.72-82
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    • 2012
  • Recently in treatment planning for orthognathic surgery, 3-dimensional analysis using CBCT can give more detailed information that cannot be achieved with 2-dimensional cephalograms. Also, laser Scanning and 3D camera can show 3-dimensional information on soft tissue changes as well as hard tissue changes in orthognathic surgery patients. In other words, soft tissue changes in lateral facial area as well as mid facial area can be quantitatively calculated. To bring out the best results from orthognathic surgery, close interaction between orthodontist and oral surgeon is needed and well treated pre-surgical orthodontics can simplify orthognathic surgical plan that also results in good long-term stability. In surgery-first cases, more thoughtful diagnosis and pre-operative preparation will be needed to prevent complicated problems.

Analysis of Advertisement Types of Global Fashion Brands : A study focused on the trends of photo image components and styles of expression in global fashion advertisements. (글로벌 패션브랜드 광고의 유형 분석 - 패션광고 사진이미지 구성요소와 표현형식을 중심으로 -)

  • Chang, Gyeong-Hae
    • Journal of the Korea Fashion and Costume Design Association
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    • v.19 no.4
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    • pp.17-27
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    • 2017
  • This study analyzes the trends of photo image components and forms of expression in global fashion advertising photos. First, photo image components are classified into seven categories: location (indoor-outdoor), the model's movement, pose, facial expression, gender, race and number of models. The forms of expression are classified into six categories: direct expression, sensual expression, symbolic expression, storytelling expression, dramatic expression, and sexual expression. With the aforementioned classifications, the trends were studied for three years from 2013 to 2015. The analysis result indicates the following: for the details of photo image components, the portion of indoor photos, static poses and conscious facial expressions was over 60% of the total for every season of the 3 years, while there was a slight increase in the number of models and the diversity of races. For the forms of expression, the sensual expression showed the largest portion accounting for over 50% of the total, followed by direct expression and storytelling expression. The findings from this study show that the trends of photo image components and forms of expression in global fashion advertisements are changing. Therefore, domestic companies will need to develop photo image components and forms of expression in line with the changing global fashion advertisement trends.

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Factors affecting smile esthetics in adults with different types of anterior overjet malocclusion

  • Cheng, Hsin-Chung;Cheng, Pei-Chin
    • The korean journal of orthodontics
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    • v.47 no.1
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    • pp.31-38
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    • 2017
  • Objective: This study aimed to quantitatively assess the relationship of smile esthetic variables with various types of malocclusion, and identify the cephalometric factors affecting smile measurements. Methods: This retrospective study included 106 patients who were treated with retention at the orthodontic department of Taipei Medical University Hospital. Hard-tissue variables were measured using lateral cephalographic tracings, and nine smile esthetic variables were measured using facial photographs. The patients were divided into three groups according to their overjet (< 0, 0-4, and > 4 mm). An analysis of variance was conducted to compare the pretreatment cephalometric variables and smile esthetic variables among the three groups. Multiple linear regression analysis was performed to identify the cephalometric factors affecting the smile measurements in each group. Results: Except the upper midline and buccal corridor ratio, all of the smile measurements differed significantly among the three groups before orthodontic treatment. Some of the smile characteristics were correlated with the cephalometric measurements in different types of malocclusion. The overjet was the major factor influencing the smile pattern in all three types of malocclusion. Conclusions: Smile characteristics differ between different types of malocclusion; the smile may be influenced by skeletal pattern, dental procumbency, or facial type. These findings indicate that establishment of an optimal horizontal anterior teeth relationship is the key to improving the smile characteristics in different types of malocclusion.

Effect of Sophorae Radix-Skin Lotion on Acne (고삼(苦蔘) 추출물을 함유한 화장수의 여드름에 대한 효과)

  • Baek, Sang-Chul;Jo, Eun-Hee;Mendgerel, Mendgerel;Park, Min-Cheol
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.24 no.1
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    • pp.111-120
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    • 2011
  • Background & Objective : Sophorae Radix has been known as an useful plant with anti-inflammatory and anti-bacterial activity. Therefore, Sophorae Radix is expected to mitigate and prevent acne by inhibiting the activity of the sebaceous glands and acne bacterium. To evaluate anti-inflammation effect of Sophorae Radix, we applied Sophorae Radix-skin lotion on the patients with acne. Methods : The Sophorae Radix-skin lotion was prepared by dissolving 1% ethanol extract of Sophorae Radix in skin lotion vehicle and treated 2 times everyday for 4 weeks on faces. Follow-up was performed with Janus facial analysis system. Results : Sophorae Radix-skin lotion reduced sebum and porphyrin. However, the Sophorae Radix-skin lotion didn't significantly reduced sebum and porphyrin compared with skin lotion vehicle control group. Conclusion : These results showed that the Sophorae Radix-skin lotion could be used as a pharmaceutical material with anti-inflammatory effects by reducing sebum and porphyrin in acne patient with further clinical research.

Measurement and Analysis of Arousal While Experiencing Light-Field Display Device

  • Choi, Hyun-Jun;Kim, Noo-Ree;Park, Hyun-Rin
    • Journal of information and communication convergence engineering
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    • v.18 no.3
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    • pp.188-193
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    • 2020
  • In this paper, we examine whether the 3D image experience through a light-field display device showed the difference in the arousal of the user compared with the 2D image experience. For our experiment, the Looking GlassTM (LG) was used as a lightfield display device that provided 3D images, and 2D images were provided by digital and printed images. The subject's facial behavior during each media experience was recorded for analysis and the degree of arousal was measured by FaceReaderTM. As a result, the first image presented in the first order among the three kinds of images showed that there was a statistical difference in the degree of arousal between the three media. However, no significant differences were found between the three media in the other images. This may be because the arousal did not increase from the experience of the second image through the LG, owing to habituation. In conclusion, the 3D imaging experience may appear in the beginning, but does not continue.

Face Recognition using Extended Center-Symmetric Pattern and 2D-PCA (Extended Center-Symmetric Pattern과 2D-PCA를 이용한 얼굴인식)

  • Lee, Hyeon Gu;Kim, Dong Ju
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.9 no.2
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    • pp.111-119
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    • 2013
  • Face recognition has recently become one of the most popular research areas in the fields of computer vision, machine learning, and pattern recognition because it spans numerous applications, such as access control, surveillance, security, credit-card verification, and criminal identification. In this paper, we propose a simple descriptor called an ECSP(Extended Center-Symmetric Pattern) for illumination-robust face recognition. The ECSP operator encodes the texture information of a local face region by emphasizing diagonal components of a previous CS-LBP(Center-Symmetric Local Binary Pattern). Here, the diagonal components are emphasized because facial textures along the diagonal direction contain much more information than those of other directions. The facial texture information of the ECSP operator is then used as the input image of an image covariance-based feature extraction algorithm such as 2D-PCA(Two-Dimensional Principal Component Analysis). Performance evaluation of the proposed approach was carried out using various binary pattern operators and recognition algorithms on the Yale B database. The experimental results demonstrated that the proposed approach achieved better recognition accuracy than other approaches, and we confirmed that the proposed approach is effective against illumination variation.

Design of Two-Dimensional Robust Face Recognition System Realized with the Aid of Facial Symmetry with Illumination Variation (얼굴의 대칭성을 이용하여 조명 변화에 강인한 2차원 얼굴 인식 시스템 설계)

  • Kim, Jong-Bum;Oh, Sung-Kwun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.7
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    • pp.1104-1113
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    • 2015
  • In this paper, we propose Two-Dimensional Robust Face Recognition System Realized with the Aid of Facial Symmetry with Illumination Variation. Preprocessing process is carried out to obtain mirror image which means new image rearranged by using difference between light and shade of right and left face based on a vertical axis of original face image. After image preprocessing, high dimensional image data is transformed to low-dimensional feature data through 2-directional and 2-dimensional Principal Component Analysis (2D)2PCA, which is one of dimensional reduction techniques. Polynomial-based Radial Basis Function Neural Network pattern classifier is used for face recognition. While FCM clustering is applied in the hidden layer, connection weights are defined as a linear polynomial function. In addition, the coefficients of linear function are learned through Weighted Least Square Estimation(WLSE). The Structural as well as parametric factors of the proposed classifier are optimized by using Particle Swarm Optimization(PSO). In the experiment, Yale B data is employed in order to confirm the advantage of the proposed methodology designed in the diverse illumination variation