טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentBrand Yulia
SubjectTransitive Re-Identification
DepartmentDepartment of Electrical Engineering
Supervisors Professor Michael Lindenbaum
Dr. Tamar Avraham
Full Thesis textFull thesis text - English Version


Abstract

Person re-identification accuracy can be substantially improved given a training set that demonstrates changes in appearances associated with the two non-overlapping cameras involved. Here we test whether this advantage can be maintained when directly annotated training sets are not available for all camera pairs at the site. Given training sets capturing correspondences between cameras A and B and a different training set capturing correspondences between cameras B and C, the Transitive Re-IDentification algorithm (TRID) suggested here provides a classifier for (A, C) appearance pairs. The proposed method is based on statistical modeling and uses a marginalization process for the inference. This approach significantly reduces the annotation effort inherent in a learning system, from O(N2) to O(N), for a site containing N cameras. Moreover, when adding camera (N), only one inter-camera training set is required for establishing all correspondences. In our experiments we found that the method is effective and more accurate than the competing camera-invariant approach.