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다각근사화와 좌표 이동을 이용한 겹친 2차원 물체 인식 및 은선 재구성
박원진,유광열,이대영 한국통신학회 1987 韓國通信學會論文誌 Vol.12 No.5
본 논문은 겹친 2차원 물체 인식과 좌표이동에 관한 실험적 시각 시스템 설계와 알고리즘에 관한 연구이다. 대상 물체는 실제 공구를 사용하였고 공구의 모양은 변하지 않으며 평편하다고 가정한다. 인식 시스템에서의 영상내의 물체의 형태는 물체의 인식에 이용되는 형태로 서술된다. 입력 데이터는 물체의 윤곽선의 순차적 배열로 감축되고 윤곽 데이터는 다각 근사화에 의해 최소한의 윤곽 꼭지점으로 줄어든다. 인식은 모델과 새로 입력된 영상과의 매칭에서 유사성을 찾는 과정이다. 다음 모델에서 겹친 물체로의 좌표이동에 의하여 은선은 재구성된다. 최상의 매칭은 유사성 검출의 최적화에 의해 얻어진다. This paper presents an experimental model-based vision system which can identify and locate objects in scenes containing multiple occluded parts. The objects are assumed to be rigid and planar parts. In any recognition system the-type of objects that might appear in the image dictates the type of knowledge that is needed to recognize the object. The data is reduced to a sequential list of points or pixels that appear on the boundary of the objects. Next the boundary of the objects is smoothed using a polygonal approximation algorithm. Recognition cosists in finding the prototype that matches model to image. Now the hidden edge is reconstructed by transition model objects into occluded objects. The best match is obtained by optimising some similarity measure.
Identification of Applications of Mobile Devices to Improve Airport BHS Maintenance
박원진,신도형,우성권,이시욱 대한토목학회 2014 KSCE JOURNAL OF CIVIL ENGINEERING Vol.18 No.5
Maintenance is increasingly becoming more extensively as facilities have become larger, more complex and more diverse. Thismovement has become considerably importance on efficient maintenance based on mobile IT (Information Technology) application. Previous studies on facility maintenance using mobile information mostly suggested its applicability based on the investigation ofindividual maintenance operations. In order to promote substantial improvement of maintenance operations, however, theapplications of mobile devices for facility maintenance should be identified thorough all phases of facility maintenance operations. This study aims to assess and identify the activities suitable for the aid from mobile devices in terms of information mobility in allphases of airport Baggage-Handling System (BHS) maintenance. To accomplish this, the interviews were conducted with themaintenance experts of Incheon International Airport BHS. From these, the 26 activities in the 6 maintenance phases were identified. Based on the assessment of the activities with respect to information mobility opportunity, 4 activities (arrival to the site, utilization offield manuals, preparation of the test sheet, and prepare of the error report) were deduced as those in which improvements withmobile devices can be introduced in terms of the efficiency of the maintenance operations and the work ease. The results of this studyare expected to contribute to the foundations of developing mobile IT systems for BHS or similar maintenance systems.
박원진 大韓成形外科學會 1997 Archives of Plastic Surgery Vol.24 No.1
The traditional transaxillary approach for breast augmentation gained popularity among plastic surgeons for its absence of scar of the breast, minimal loss of nipple sensation and theoretically decreased risk of periprosthetic infections by minimizing contact with breast tissue. The shortcomings of the traditional approach are limitation of visualization and hemostasis. Blunt dissection limits surgeons ability to precisely control the inframammary fold and lower pole of breast. This limitation may result in improper implant placement and poor aesthetic result. In order to overcome theirs disadvantages, we used endoscopic technique in transaxillary technique. With endoscopically detected transaxillary subpectoral breast augmentation, bleeding vessels are easily seen and coagulated. Visualization of the pocket allows significantly better control of the inframammary fold. We can also divide the pectoralis muscles and prepectoralis fascia under controlled visualization. From 1994 to 1996, 84 implants have been placed in 42 patients utilizing the endoscopic assisted transaxillary subpectoral augmentation mammaplasty. We used 32 textured implants and 52 smooth type implants. Follow up ranged from 2weeks to 18 months. We did not experience any hematomas, infections, capsular contractures or other complications. We obtained good aesthetic results and patient acceptance. With endoscopically assisted transaxillary subpectoral augmentation mammaplasty, we have precise control of inframammary crease and hemostasis. As we obtained good aesthetic results, here, we have described our surgical technique and brief clinical experiences.