Title 
Observation of Airport Queue Sizes using Surveillance Cameras 
Author

Jensen, Martin Andreas Falk

Supervisor

Larsen, Rasmus (Image Analysis and Computer Graphics, Department of Informatics and Mathematical Modeling, Technical University of Denmark, DTU, DK2800 Kgs. Lyngby, Denmark)

Institution 
Technical University of Denmark, DTU, DK2800 Kgs. Lyngby, Denmark 
Thesis level 
Master's thesis 
Year 
2009 
Abstract 
This thesis deals with the development and evaluation of a system that with
the use of image analysis and mathematical modeling, can measure the size of
queues from image sequences recorded with surveillance cameras. The system
is developed with the aim of solving the image analysis problem defined by a
request from SAS Scandinavian Airlines. SAS requested a method to automatically
measure queue sizes in longer periods of time in Copenhagen Airport from
a large database of image sequences.
The problem is solved based on the assumption that queues can be identified
as foreground objects in the image sequence. The foreground segmentation of
the images is done with a modified version of the Mixture of Gaussian’s method
by Stauffer and Grimson [13] that can handle most of the dynamic changes of
the queue background in an indoor environment. The extent of the queue on
the floor plane is subsequently estimated by assuming that the height of the
queue is relatively constant and applying knowledge of the image formation in
the surveillance camera. Finally the relative size of the queue is predicted by a
linear regression model that predicts the queue size as a linear combination of
the area of the queue extent in different parts of the floor plane.
The developed system has been evaluated on two queue locations and is capable
of categorizing the queue size in long periods of time into four groups with an
average classification rate of about 85%. The classification rate can be improved
if the number of groups are reduced to three. The system can be applied on
other queue locations with few preparations. It is concluded that the developed
system can produce reliable estimates of the queue size over longer periods of
time. 
Note 
Thesis not publicly available 
Imprint 
Technical University of Denmark (DTU) : Kgs. Lyngby, Denmark 
Series 
IMMM.Sc.200970 
Admin 
Creation date: 20091209
Update date: 20091209
Source: dtu
ID: 253642
Original MXD
