Detecting questionable observers using face track clustering

We introduce the questionable observer detection problem: Given a collection of videos of crowds, determine which individuals appear unusually often across the set of videos. The algorithm proposed here detects these individuals by clustering sequences of face images. To provide robustness to sensor...

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Bibliographic Details
Main Authors: Barr, Jeremiah R, Bowyer, Kevin W, Flynn, Patrick J
Format: Conference Proceeding
Language:English
Subjects:
Clustering algorithms
Detection algorithms
Face
Face recognition
Feature extraction
Observers
Videos
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Description
Summary:We introduce the questionable observer detection problem: Given a collection of videos of crowds, determine which individuals appear unusually often across the set of videos. The algorithm proposed here detects these individuals by clustering sequences of face images. To provide robustness to sensor noise, facial expression and resolution variations, blur, and intermittent occlusions, we merge similar face image sequences from the same video and discard outlying face patterns prior to clustering. We present experiments on a challenging video dataset. The results show that the proposed method can surpass the performance of a clustering algorithm based on the VeriLook face recognition software by Neurotechnology both in terms of the detection rate and the false detection frequency.
ISSN:1550-5790
2642-9381
DOI:10.1109/WACV.2011.5711501