237 research outputs found

    Polytopes, Feasible Regions and Occlusions in the n-view Reconstruction Problem

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    This paper assesses the question, given a arbitrary point in P3, can it be reconstructed by a given camera orbit? We show that a solution to this problem can be found by intersecting the frustrums of the cameras in the sequence creating a polyhedron that bounds the area in P3 observed by all cameras. For a projective set of cameras this can be considered as an expansion of the chetral inequalities. We also show an exception to this basic principle is encounted when the point in P3 is occluded. Thus giving a weak condition for occlusion of an arbitrary point in P3

    A Closed Form Solution to the Reconstruction and Multi-View Constraints of the Degree d Apparent Contour

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    This paper presents a novel theoretical approach to calculating the apparent contour of a smooth surface. The problem is formulated as a dual space intersection of algebraic tangent cones, which we will consider to be the members of degree d hypersurfaces. The well known theoretical foundation for multi-view geometry is extended in light of this to solve the problems of triangulation and forming multi-view matching constraints for degree d apparent contours

    Blind Spot Safety System

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    The Blind spot safety system is a driver assistant which it will safeguard you when you switch lanes and prevent you from missing the hazard in your blind spot. Although shoulder checking is mandatory in North America, some still ignore this rule or forget to do so, furthermore in some country shoulder checks aren’t required. Certain vehicles have interior designs which limit vision and even with a shoulder check changing lanes can still be dangerous and uncertain for the driver. Therefore our system will help the drive avoid hitting other road users when they switch lanes.&nbsp

    The scope for pavement porters: addressing the challenges of last-mile parcel delivery in London

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    The UK parcel sector generated almost £9 billion in revenue in 2015, with growth expected to increase by 15.6% in 2019 and is characterized by many independent players competing in an ‘everyone-delivers-everywhere’ culture leading to much replication of vehicle activity. With road space in urban centers being increasingly reallocated to pavement widening, bus and cycle lanes, there is growing interest in alternative solutions to the last-mile delivery problem. We make three contributions in this paper: firstly, through empirical analysis using carrier operational datasets, we quantify the characteristics of last-mile parcel operations and demonstrate the reliance placed on walking which can make up over 60% of the round time; secondly we introduce the concept of ‘portering’ where vans rendezvous with porters who operate within specific ‘patches’ to service consignees on-foot, potentially saving 86% in driving distance on some rounds; finally, we highlight the wider practical issues and optimization challenges associated with operating driving and portering rounds in inner urban areas

    Business cycle synchronisation in EMU: Can fiscal policy bring member-countries closer?

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    The present study adds to the literature on the impact of fiscal policy on business cycle synchronisation. Specifically, it investigates the effects of fiscal policy on business cycle synchronisation between the 10 EMU member-countries and the aggregate EMU12-wide business cycle, using a time-varying framework. The findings suggest that fiscal policy has important effects on business cycle synchronisation for all 10 EMU countries. Hence, fiscal policy is shown to have the potential to be supportive of macroeconomic stabilisation in the Eurozone. However the evidence reveals that none of the countries under examination consistently use fiscal policy to promote business cycle synchronisation
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