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Wonwoo Lee 한국의정연구회 2013 의정논총 Vol.8 No.1
By comparing the balancing strategies ‘Anti-Access’ and ‘Air-Sea Battle,’ this paper approaches the implications for the Korean Peninsula and East Asian security. China's active defense strategy proceeding to power transition in East Asia has been evaluated to cause the US's strong responses to mobilize military and diplomatic countermeasures, namely 'Pivot to Asia.' In this context, to maintain peace and the status quo, regional countries should participate in the appropriate control of the Shared Regional Hegemony which means neither accepting too much of China's assertion nor agreeing to excessive military strategies of the US. To reduce the impact of the two rival strategies, as a supporting or coordinating actor, the Republic of Korea (ROK) must properly utilize 'ROK-US-China' and 'ROK-US-Japan' triangles based on the ROK-US alliance, while she has to pursue unilateral initiatives and invite reciprocation of North Korea as a long-term strategy for cooperation. Finally, to prevent regional conflicts, regional states should establish a legally binding mechanism. The legally binding mechanism needs to pursue a middle course between the regional alliance and the multilateral security cooperation system to control the two giants’ (the US and China) unilateralism, as a kind of collective security system in East Asia.
Design and Analysis of Polarization Diversity Antenna for Mobile Terminals
Wonwoo Lee,이병호 한국전자통신연구원 2014 ETRI Journal Vol.36 No.1
This letter presents an antenna design method for anorthogonally-polarized dual antenna for use in mobile stations(MSs) and includes a verification method for improving thelink-level throughput performance of an MS that uses aproposed multiple-input multiple-output antenna. The link-levelthroughput performance of an MS is strongly related to thecorrelation between antenna branches, which is determined bythe cross polarization discrimination of the second branchantenna, both numerically and experimentally.
Silhouette Segmentation in Multiple Views
Wonwoo Lee,Woontack Woo,Boyer, E IEEE 2011 IEEE transactions on pattern analysis and machine Vol.33 No.7
<P>In this paper, we present a method for extracting consistent foreground regions when multiple views of a scene are available. We propose a framework that automatically identifies such regions in images under the assumption that, in each image, background and foreground regions present different color properties. To achieve this task, monocular color information is not sufficient and we exploit the spatial consistency constraint that several image projections of the same space region must satisfy. Combining the monocular color consistency constraint with multiview spatial constraints allows us to automatically and simultaneously segment the foreground and background regions in multiview images. In contrast to standard background subtraction methods, the proposed approach does not require a priori knowledge of the background nor user interaction. Experimental results under realistic scenarios demonstrate the effectiveness of the method for multiple camera set ups.</P>
Video-Based In Situ Tagging on Mobile Phones
Wonwoo Lee,Youngmin Park,Lepetit, V.,Woontack Woo IEEE 2011 IEEE transactions on circuits and systems for vide Vol.21 No.10
<P>We propose a novel way to augment a real-world scene with minimal user intervention on a mobile phone; the user only has to point the phone camera to the desired location of the augmentation. Our method is valid for horizontal or vertical surfaces only, but this is not a restriction in practice in manmade environments, and it avoids going through any reconstruction of the 3-D scene, which is still a delicate process on a resource-limited system like a mobile phone. Our approach is inspired by recent work on perspective patch recognition, but we adapt it for better performances on mobile phones. We reduce user interaction with real scenes by exploiting the phone accelerometers to relax the need for fronto-parallel views. As a result, we can learn a planar target in situ from arbitrary viewpoints and augment it with virtual objects in real-time on a mobile phone.</P>