TY - GEN
T1 - Polarization-cum-energy metric for footstep detection using vector-sensor
AU - Venkatraman, Divya
AU - Reddy, Vinod V.
AU - Khong, Andy W.H.
AU - Ng, B. P.
PY - 2011
Y1 - 2011
N2 - We address the problem of human footstep detection using data recorded by a single tri-axial geophone. It is observed that footstep signature recorded using a vector-sensor is characterized by signal polarization, which, when exploited effectively, has the capability to identify footsteps at increasing source-sensor distances compared to existing techniques. We quantify the effect of signal polarization by fitting a great-arc using spherical linear interpolation (SLERP) to the data vectors after normalization. Furthermore, the signal polarization metric, which provides extended detection range, is combined with signal energy to form a robust polarization-cum-energy metric for efficient detection. Experimental results are presented to substantiate the performance of this technique.
AB - We address the problem of human footstep detection using data recorded by a single tri-axial geophone. It is observed that footstep signature recorded using a vector-sensor is characterized by signal polarization, which, when exploited effectively, has the capability to identify footsteps at increasing source-sensor distances compared to existing techniques. We quantify the effect of signal polarization by fitting a great-arc using spherical linear interpolation (SLERP) to the data vectors after normalization. Furthermore, the signal polarization metric, which provides extended detection range, is combined with signal energy to form a robust polarization-cum-energy metric for efficient detection. Experimental results are presented to substantiate the performance of this technique.
KW - Footstep detection
KW - polarization
KW - vector-sensor
UR - http://www.scopus.com/inward/record.url?scp=84855771902&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84855771902&partnerID=8YFLogxK
U2 - 10.1109/THS.2011.6107870
DO - 10.1109/THS.2011.6107870
M3 - Conference contribution
AN - SCOPUS:84855771902
SN - 9781457713750
T3 - 2011 IEEE International Conference on Technologies for Homeland Security, HST 2011
SP - 196
EP - 201
BT - 2011 IEEE International Conference on Technologies for Homeland Security, HST 2011
T2 - 11th IEEE International Conference on Technologies for Homeland Security, HST 2011
Y2 - 15 November 2011 through 17 November 2011
ER -