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Moving Objects Detection at an Intersection by Sequential Background Extraction
Shin-ichiro Sonoda,Joo Kooi Tan,Hyoungseop Kim,Seiji Ishikawa,Takashi Morie 제어로봇시스템학회 2011 제어로봇시스템학회 국제학술대회 논문집 Vol.2011 No.10
Recently, there are many traffic accidents in turning right at an intersection. They are mainly caused by a driver’s oversight of pedestrians and motorcycles that are occluded by oncoming cars. Therefore a system is necessary to detect moving objects such as oncoming cars and pedestrians at an intersection, and warn a vehicle driver. This paper describes a technique for detecting moving objects in turning right at an intersection when vehicle is stopping. Moving objects are detected by Mixture of Gaussians (MoG). In addition, we distinguish cars from pedestrians using the difference of the area size and the aspect ratio of detected objects. The object which is classified as a pedestrian is tracked using Lucas-Kanade Tracker. If the detected cars and pedestrians overlap or a car completely obscures pedestrians, we perform the estimation of pedestrian’s location by using the information on past frames. By doing this, it is possible to detect pedestrians that drivers are actually difficult to see. The performance of the proposed technique was examined employing car videos and satisfactory results were obtained.
( Kimio Ushijima ),( Shuji Takemoto ),( Kouichiro Kawano ),( Shin Nishio ),( Atsumu Terada ),( Naotake Tsuda ),( Gonosuke Sonoda ),( Syun Ichiro Ota ),( Toshiharu Kamura ) 대한산부인과학회 2012 Obstetrics & Gynecology Science Vol.55 No.4
Type III radical abdominal hysterectomy (RAH) is standard care for early stage cervical cancer. For the past few decades, there has been a remarkable shift from surgery to radiation, in the treatment choice for stage 1b2 and 2b cervical cancer in Japan. It is still controversial, however because some of those cases recommended RAH as a suitable treatment strategy. About 8% to 10% of RAH are abandoned because of tumor status. Recent preoperative screening cannot always detect them preoperatively. Various kinds of new surgical instruments, such as bipolar scissors and the electro vessel sealing system LigaSure have contributed to reducing the operation time and blood loss, in performing RAH. Furthermore, various kinds of devices are on the market. Surgeons should choose suitable instruments depending on the state of the disease and the patient.