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모바일 엣지향 손 포즈 인식 어플리케이션을 위한 인식률 향상 방법
임바다(bada lim),이재성(Jaesung Lee) 대한전자공학회 2020 대한전자공학회 학술대회 Vol.2020 No.8
Recently, demand for non-contact IT technology is rapidly increasing due to Corona-19. However, the risk of virus infection remains because current kiosks require finger contact to screen. With the development of deep learning technology, the recognition rate of images and videos has almost reached that of humans. However, in order to obtain that rate, server- (or cloud-) level computing power is required. A kiosk is produced on demand (custom design), and each store has different contents that its device should learn. Therefore, it is often difficult to utilize server-class computing power. This paper proposes two image-preprocessing methods to overcome the recognition rate decrease that can occur when the hand pose recognition function is implemented through a camera and edge computing of a store kiosk. The recognition rate is increased 46∼86% and 32∼63%, through shadow removal and face masking, respectively. Therefore, it might be possible to implement the hand pose recognition function having the server-level recognition rate only with the edge computing power.
지구자기장 기반 실내측위기술의 건설현장 적용 가능성 검토
김현민 ( Kim Hyeonmin ),이창우 ( Lee Changwoo ),김형준 ( Kim Hyungjun ),이창수 ( Lee Changsu ),임바다 ( Lim Bada ),조훈희 ( Cho Hunhee ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.1
Despite the acuuracy, stability, and economic feasibility of geomagnetic field-based indoor positioning, its applicability in construction sites needs to be thoroughly discussed due to the issue of distortion of geomagnetic fields around ferromagnetic objects such as rebars. In this study, the possibility of applying the geomagnetic field-based indoor positioning in construction sites was reviewed through the Student’s t-test after measuring the changes in geomagnetic field values depending on the presence or absence of rebars. The statistical analysis revealed that there is a high probability (over 80%) of significant changes in geomagnetic field values when measuring points are located within 60cm from the rebars. On the other hand, the probability of minimal changes in geomagnetic field values is over 90% when measuring points are located more than 60cm from the rebars. This suggests the application of geomagnetic-based indoor positioning in construction sites would be possible if the issue of distortion in geomagnetic field values near rebars within 60cm is resolved.