?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F755%2F&rft.title=Evaluation+of+the+Accuracy+of+a+Computer-Vision+Based+Crowd+Monitoring+System&rft.creator=Ward%2C+Jonathan&rft.creator=Antonucci%2C+Giancarlo&rft.creator=Barter%2C+Edmund&rft.creator=Brooks-Tyreman%2C+Frank&rft.creator=Connaughton%2C+Colm&rft.creator=Coughlan%2C+Michael&rft.creator=Kuhne%2C+Ronja&rft.creator=Kaiser%2C+Marcus&rft.creator=Wang%2C+Victor&rft.subject=Information+and+communication+technology&rft.description=Computer+vision+systems+can+be+used+to+measure+pedestrian+flow+rates%2C+occupancy+levels+and+queue+times.+It+is+difficult+to+assess+the+accuracy+of+such+methods+because+the+ground+truth+can+be+difficult+to+establish.+Human+counting+is+equally+prone+to+error%2C+even+when+using+video+recordings+with+no+time+constraints+and+the+support+of+sophisticated+software.%0D%0AIn+this+report%2C+we+consider+how+errors+may+arise+directly+from+the+images+recorded+by+the+cameras%2C+due+to+both+occlusion+of+people+and+image+distortion+due+to+a+fisheye+lens.+We+also+develop+a+statistical+model+of+human+counting+errors+and+attempt+to+estimate+human+accuracy+from+data.+Finally%2C+we+attempt+to+relate+human+and+computer+accuracy+on+the+basis+of+simplifying+statistical+approximations.&rft.date=2018&rft.type=Study+Group+Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F755%2F1%2Fesgi-crowdvision-draft-v1.pdf&rft.identifier=++Ward%2C+Jonathan+and+Antonucci%2C+Giancarlo+and+Barter%2C+Edmund+and+Brooks-Tyreman%2C+Frank+and+Connaughton%2C+Colm+and+Coughlan%2C+Michael+and+Kuhne%2C+Ronja+and+Kaiser%2C+Marcus+and+Wang%2C+Victor++(2018)+Evaluation+of+the+Accuracy+of+a+Computer-Vision+Based+Crowd+Monitoring+System.++%5BStudy+Group+Report%5D+++++