• 반도체디스플레이기술학회지
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• 제15권2호
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• pp.61-65
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• 2016

Facial feature detection is a fundamental function in the field of computer vision such as security, bio-metrics, 3D modeling, and face recognition. There are many algorithms for the function, active shape model is one of the most popular local texture models. This paper addresses issues related to face detection, and implements an efficient extraction algorithm for extracting the facial feature points to use on iOS platform. In this paper, we extend the original ASM algorithm to improve its performance by four modifications. First, to detect a face and to initialize the shape model, we apply a face detection API provided from iOS CoreImage framework. Second, we construct a weighted local structure model for landmarks to utilize the edge points of the face contour. Third, we build a modified model definition and fitting more landmarks than the classical ASM. And last, we extend and build two-dimensional profile model for detecting faces within input images. The proposed algorithm is evaluated on experimental test set containing over 500 face images, and found to successfully extract facial feature points, clearly outperforming the original ASM.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2018년도 추계학술대회
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• pp.184-185
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• 2018

개인의 얼굴 표정을 인식하고 그 사람에게 적합한 음악을 재생하는 시스템 인 Face Song Player가 제공됩니다. 얼굴 윤곽선 정보를 학습하고 평균을 추출하여 얼굴 모양 정보를 획득합니다. MUCT DB는 학습을위한 DB로 사용되었습니다. 얼굴 표정을 인식하기 위해 표정이 없는 이미지를 기반으로 각 표현의 특성 차이를 사용하여 알고리즘을 설계했습니다.

• 한국인터넷방송통신학회논문지
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• 제14권3호
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• pp.89-97
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• 2014

본 논문에서는 운전자의 졸음 판단에 필요한 눈 깜빡임과 하품에 대해 실시간 빈도수 측정 프로그램을 제안한다. 사용자의 눈과 입의 개폐 빈도수 측정을 위해서 CCD 카메라 영상을 기반으로 OpenCV를 이용하여 얼굴을 검출한 후, 검출된 얼굴을 기반으로 눈동자 영역 추출 기술인 CDF(Cumulative Distribution Function)를 사용하여 눈의 위치를 찾아서 활성 윤곽(Active Contour) 기술을 이용하여 눈과 입의 영역을 추출한다. 추출된 눈과 입의 영역을 본 프로그램을 이용하여 각 각의 개폐 빈도수를 측정하며 결과 값을 분석하여 사용자의 졸음 판단을 위한 기반 기술로 활용한다.

• 화약ㆍ발파
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• 제20권2호
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• pp.7-19
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• 2002

The cut is placed high up in the section, the 1st sloping holes below the cut, and divided all the holes located below the 1st sloping holes into a certain area with longitudinal section, to lower pollution made from tunnel blasting. With the sequential blasting machine, after I first blasted holes around the cut holes by a pre-splitting method, blasted the cut area and the 1st sloping holes. The 1st and 2nd sloping holes divided areas are initiated gradually to free face upwards made by the cut. Especially, I pre-splinted contour holes previous blast the before sloping holes from the contours. The ground vibration from the earth surface just over the advance face decreased about 42.0% compare with the down blasting method under the condition of equal charge weight per delay. I controlled the crack and over break of the mother rock by pre-splitting contour holes before blast the first sloping holes from the contours. The peak values of noise and air blast by blasting decreased about 10dB more than the down blasting method. the noise and air blast diminished gradually as a round. The throw distance of the fly rock was decreased about 55%.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제26권2호
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• pp.204-210
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• 2000

The mandibular contour determines the shape of the lower part of the face and thus influences the appearance of the face. A patient with a large, squarish, or broad face who desires a small, round, or slender face can undergo mandibular contouring surgery to reduce the width of the lower face. The successful correction of a prominent mandibular angle by conventional angle ostectomy has been reported. But, in the majority of patients with a widened facial appearance, both the mandibular angle and part of the mandibular body anterior to it are protuberant laterally, so both must be resected. The purpose of this study is to introduce a new method of performing mandibular contouring surgery, more effectively and easily, and to reduce postoperative complication and evaluate its results. We treated 6 patients who has prominent mandibular angle using multiple step osteotomy with angle-splitting ostectomy. The advantages of this new method are as following. (1) easily performable (2) effective mandibular contouring surgery by reducing the width of lower face (3) producing a natural relief of the mandibular angle (4) low risk of soft tissue damage and complications (5) shortening of the operation time. etc.

• 대한치과교정학회지
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• 제6권1호
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• pp.79-82
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• 1976

This study was undertaken to investigate the values of the cephalometric standards of Korean children which consisted of 57 boys and 61 girls with normal occlusion and harmony of the facial musculature. The following conclusions were obtained. 1) The relatively vertical inclination of nasal bone and flat contour of the frontal bone contribute to the flattening of the upper face. 2) Slight lack of chin prominence characterizes the lower face while procumbent incisors and their alveolar bone dominate the middle face. 3) A caudal skull base inclination is probably the most specific feature for Korean.

• Archives of Reconstructive Microsurgery
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• 제23권1호
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• pp.40-43
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• 2014

A submental artery perforator flap was applied to the defect site after surgical excision of basal cell carcinoma on the right lower face. Three points were beneficial: it was perfect for assuring the safe margin of the mandibular branch of the facial nerve as well as intact platysma muscle, functionally; harvesting the flap was much easier than that of submental artery flap, surgically; and the color and contour were well matched aesthetically.

• 한국멀티미디어학회논문지
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• 제11권12호
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• pp.1676-1687
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• 2008

In this paper, we proposed a new multi-view human recognition method based on face and gait features detection algorithm. For getting the position of moving object, we used the different of two consecutive frames. And then, base on the extracted object, the first important characteristic, walking direction, will be determined by using the contour of head and shoulder region. If this individual appears in camera with frontal direction, we will use the face features for recognition. The face detection technique is based on the combination of skin color and Haar-like feature whereas eigen-images and PCA are used in the recognition stage. In the other case, if the walking direction is frontal view, gait features will be used. To evaluate the effect of this proposed and compare with another method, we also present some simulation results which are performed in indoor and outdoor environment. Experimental result shows that the proposed algorithm has better recognition efficiency than the conventional sing]e view recognition method.

• Archives of Plastic Surgery
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• 제36권4호
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• pp.475-480
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• 2009

Purpose: To correct the facial asymmetry and to achieve symmetry and balance, not only the soft tissue restoration of deficits but also creation and facial contour line such as mandible border and angle is important. Micro fat graft has limitation such as high resorption rate and somewhat limited ability to emphasize the rigid bony characteristics of the mandible angle due to its innate soft consistency. We have investigated the advantages of dermal fat graft over micro fat graft to correct asymmetry of the lower face in patients who had undergone mandibular reconstruction or distraction, using comparative analysis. Methods: Total of 12 patients were enrolled in our study: 6 micro fat graft and 6 dermal fat graft. Postoperative results were compared and analyzed at immediate postoperative period and more than 1 year later in each group with photographs, and analysised with image J program. Result: No complications were noted both in the micro fat type and the dermal fat type of procedures such as fat necrosis or micro calcifications. All of the patients who received micro fat graft, however had considerable amount of fat resorption after the procedure which led to two additional fat graft procedures. Although minor contour obliteration due to contracture was seen in patients who had undergone dermal fat graft procedure, no definite resorption was found even after more than one year follow-up. Results of dermal fat graft patients were satisfactory in terms of mandible angle symmetry. Secondary revision was necessary in one case due to overcorrection using dermal fat graft. Conclusion: The dermal fat graft has many advantages over the conventionally more popular micro fat graft to correct asymmetry of the lower face following mandible reconstruction owing to its lower resoption rate, more effective in emphasizing the natural curvilinear anatomical contours of the mandible angle and body and lower complication rates such as fat necrosis or micro calcifications.

• 대한두경부종양학회지
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• 제10권2호
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• pp.163-170
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• 1994

Segmental mandibulectomy causes severe functional disability and cosmetic problem. Many methods of reconstruction have been used but none of these procedures provides the ideal solution. There has been increased interest in the possibility of preserving a portion of the mandible and still carrying out a adequate tumor resection. We experienced four cases of marginal with sagittal mandibulectomy in patients with floor of mouth. buccal. and soft palate carcinoma, and sagittal mandibulectomy in 8 patients with tonsillar carcinoma and a case of marginal mandibulectomy in tonsillar cancer patient. In all cases mandible facing the tumor were successfully resected and repair of the mandible. postoperative facial contour were satisfactory. We think. that these sagittal procedures are oncologically sound in its removal of tumor. biomechanically secure and maximize postoperative rehabilitation while maintaining the normal contour of the face.