DGA-Inria PhD Position at Sophia-Anitipolis, France

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DGA-Inria PhD Position at Sophia-Anitipolis, France

  • We encourage applications from outstanding candidates with strong academic backgrounds in Mathematics, Physics, Computer Science, Engineering and related fields. At Inria we seek to increase the number of women in areas where they are underrepresented and therefore explicitly encourage women to apply. Furthermore, we are committed to increasing the number of individuals with disabilities in its workforce and therefore encourage applications from such qualified individuals. Important notice: to get PhD funding from DGA it is necessary to be a European citizen.
  • For more information and/or  to apply before April 17th, 2018,  please contact :

Josiane ZERUBIA,  Inria-SAM, http://www-sop.inria.fr/members/Josiane.Zerubia/index-eng.html email: Josiane.Zerubia@inria.fr 

  • Title: Stochastic Geometry for Multiple Object Detection and Tracking in High Resolution Multi-Source Data Sets for Wide Area Surveillance Applications 
  • Abstract:

Unmanned aerial vehicles and low-orbit satellites, including cubesats, are increasingly used for wide area surveillance which results in large amounts of multisource data (videos) that have to be processed and analyzed. These sensor platforms capture vast ground areas at roughly 2 frames per second. The number of moving objects in such data is typically very high, accounting for up to thousands of objects. Multiple objects tracking has traditionally been a major area of research in the computer vision field, but this type of data poses new, specific, tracking related challenges. The large number of small objects coupled with the reduced frame rate of the video, illumination changes and image registration provide significant sources of errors. Numerous motion models and state estimation methods like the Kalman filter or the particle filter have been proposed for object tracking.

Classical trackers such as the Multiple Hypothesis Tracker or the Joint Probabilistic Data Association Filter have been employed to solve the data association problem between multiple detections. Both approaches work on a set of data association hypothesis.  A strong limitation of these methods is that past decisions cannot be updated when new information is available. One way to cope with this problem is to use a sliding temporal window to perform tracking taking into account both past and future information and hence, removing the causality of the result. Recently, a new spatio-temporal marked point process model specifically adapted to the problem of multiple objects tracking has been developed by Craciun et al. [1]. Craciun et al. use ellipses to model the objects, boats or cars for instance, adding a non-geometric mark to facilitate the association between objects in different frames. 

Nevertheless one important drawback of the above-mentioned model is that constant velocity of the moving objects is a necessary prior hypothesis to deal with the corresponding density function to be optimized. 

In this PhD thesis we propose to get rid of this constraint by extending the previous model of Paula Craciun .

[1]  P. Craciun, M. Ortner, and J. Zerubia. Joint detection and tracking of moving objects using spatio-temporal marked point processes. Proc. IEEE Winter Conference on Applications of Computer Vision, 2015.



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