• Journal of Korea Society of Digital Industry and Information Management
• /
• v.5 no.2
• /
• pp.167-176
• /
• 2009

In this paper, a system that detects driver's drowsiness has been implemented based on the automatic extraction and the tracking of pupils. The research also focuses on the compensation of illumination and reduction of background noises that naturally exist in the driving condition. The system, that is based on the principle of Haar-like feature, automatically collects data from areas of driver's face and eyes among the complex background. Then, it makes decision of driver's drowsiness by using recognition of characteristics of pupils area, detection of pupils, and their movements. The implemented system has been evaluated and verified the practical uses for the prevention of driver's drowsiness.

• The Journal of Korean Academy of Prosthodontics
• /
• v.35 no.1
• /
• pp.211-220
• /
• 1997

This article describes verticsal dimension in its histologic and clinical aspect. Determination of correct vertical dimension of occlusion is one of the most important steps in prosthodontic rehabilitation. It is considered essential for improvement of facial esthetics and stomatognatic functions. Many techniques have been sued for measurement of the vertical dimension in dentulous and edentulous patients : pre-extraction record, physiologic rest position, swallowing, phonetics, esthetics, etc. But, there is no universally accepted or completely accurate method. Though a great deal of energy has been spent trying to find the exact position of the mandible, there is an controversial aspect of vetical dimension.

• Proceedings of the Korean Institute of Intelligent Systems Conference
• /
• 2001.12a
• /
• pp.299-302
• /
• 2001

The statistical analysis of the feature extraction and the neural networks are proposed to recognize a human face. In the preprocessing step, the normalized skin color map with Gaussian functions is employed to extract the region of face candidate. The feature information in the region of the face candidate is used to detect the face region. In the recognition step, as a tested, the 120 images of 10 persons are trained by the backpropagation algorithm. The images of each person are obtained from the various direction, pose, and facial expression. Input variables of the neural networks are the geometrical feature information and the feature information that comes from the eigenface spaces. The simulation results of$.$10 persons show that the proposed method yields high recognition rates.

• Journal of KIISE:Computing Practices and Letters
• /
• v.15 no.9
• /
• pp.705-709
• /
• 2009

In this paper, we propose 3d face modeling using two orthogonal views of 2D face images and automatically facial feature extraction. Th proposed technique consists of 2 parts, personalization of 3d face model and texture mapping.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.24 no.3
• /
• pp.651-659
• /
• 1997

This report presents a case of adolescent patient who had multiple impacted teeth and no systemic disease, and was treated with removable and fixed orthodontic appliances. The results obtained through these cases were summarized as follows : 1. Even in the case without systemic disease, there can be the delayed eruption of multiple teeth 2. If the root formation is not completed, root have no excessive curvature, axial inclination of the tooth is not excessive, and there is eruption space, the tooth can be induced to normal occlusion. 3. Since esthetically proper occlusion and dentition was acquired by recovery of the impacted teeth to normal occlusion, the prosthodontic treatment after extraction of the impacted teeth was less needed. 4. This treatment brought psychological stability to pubertal patient who was interested in his facial profile.

• The Journal of the Korean dental association
• /
• v.25 no.11 s.222
• /
• pp.1069-1077
• /
• 1987

Two brothers aged 15 1/6 and 12 2/3 years were diagnosed as Class I malocclusion with ectopic eruption of the upper left central incisor in the elder brother and etopic eruption in the upper right second premolar in the younger. All 4 second molars were extracted at the same time in both brothers. The treatment results were as follows. 1. In the elder brother, the third molars were fully erupted and their angulations were excellent at 3 years post-treatment. 2. In the younger brother, the lower right third molar was mesially erupted and upper third molars were still undergoing eruption at 3 years post-treatment. 3. Assessment of panex films of both brothers at aged 15 showed an earlier eruption of the third molars in the younger brother. 4. A longer post-treatment supervision of the third molars was required in the younger brother. 5. The facial probiles were enhanced and the ectopic eruptions were corrected in both brothers.

• Journal of Oral Medicine and Pain
• /
• v.9 no.1
• /
• pp.29-33
• /
• 1984

Dental mercury was injected accidentally to left upper buccal mucosa of a 16-year-old girl by charlatan in order to anesthetize a tooth for extraction; thereafter,injected elemental mercury was almost removed by drug adimnistration and surgical operations.One year have passed, still, there are many scaffered small radiopaque white globular cimages in dental, maxillo-facial, and chest radiographs. Redish swollen gingiva and mobility of left upper central incisor which is adjacent to mercury injection site are oral manifestations in this mercury poisoning case. Recently, the patient complains of metallic taste, gastric discomfort and abdominal pain which are thought to be symptoms of mercury poisoning, but there seems to be no serious sequelae now.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2001.05a
• /
• pp.656-659
• /
• 2001

Human have a notable ability to recognize faces, which is one of the most common visual feature in our environment. In regarding face pattern, just like other natural object, a geometrical interpretation of face is difficult to achieve. In this paper, we present wavelet based approach to extract the face features. Proposed approach is similar to the feature based scheme, where the feature is derived from the intensity data without detecting any knowledge of the significant feature. Topological graphs are involved to represent some relations between facial features. In our experiments, proposed approach is less sensitive to the intensity variation.

• Proceedings of the Korean Information Science Society Conference
• /
• 2001.04b
• /
• pp.517-519
• /
• 2001

본 논문에서는 신원 확인 시스템을 위한 얼굴 영역 탐지 및 얼굴 구성 요소들을 추출하는 방법을 제안한다. 이 방법은 신원 확인을 위해 사용자가 시스템을 조작할 때, 움직임이 발생한다는 점과 눈 영역이 주위 영역에 비하여 뚜렷하게 어두운 화소들로 구성되어 있다는 점에 착안하였다. CCD 카메라로부터 입력되는 동영상에서 차영상 기법을 이용하여 얼굴 영역을 탐지하고, 탐지된 얼굴 영역 내에서 가장 안정적인 검출 결과를 보이는 눈 영역을 추출한다. 그리고 추출된 두 눈의 위치를 이용하여 전체 얼굴의 기울기를 보정한 수, 제안하는 가변 Ratio Template을 이용하여 검출된 얼굴영역을 검증하며 코, 입과 같은 다른 얼굴 구성 요소들을 추출한다. 이 방법은 명암의 변화에 따라 유동적인 결과를 산출해내는 이진화 과정을 거치지 않으므로 국부적인 조명이 밝기 변화나 얼굴의 기울기 변화와 같은 얼굴 인식의 제약점에 강인한 특징을 가진다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2005.11a
• /
• pp.697-700
• /
• 2005

컴퓨터 비전 기술의 발달에 따라 사용자 인터페이스, 사용자 인증, 보안 등 여러 가지 응용에서 얼굴 정보를 사용하려는 많은 연구가 이루어지고 있다. 얼굴 정보를 이용하는데 있어서, 눈, 코, 입술과 같이 얼굴의 특징을 효과적으로 추출할 필요가 있다. 본 논문에서는 적응성을 갖는 여러 가지 정보를 결합함으로써 조명의 변화가 있는 경우에도 얼굴을 특징을 견고하게 추출할 수 있는 방법을 제안한다.