Title :
P1A-3 Real-Time Estimation of Lateral Displacement Using Time Domain Cross Correlation with Prior Estimates
Author :
Zahiri-Azar, R. ; Salcudean, S.E.
Author_Institution :
Robotics & Control Lab., British Columbia Univ., Vancouver, BC
Abstract :
Time domain cross correlation with prior estimates (TDPE) has been recently introduced for high frame rate real-time speckle tracking. TDPE uses prior displacement estimates of neighboring windows to speed up computation. A correlation monitoring technique is then used to verify the estimated displacement and if needed a recovery search is triggered to find the correct displacement. In this paper we extend the idea of TDPE to 2D motion tracking to estimate both the axial and the lateral component of the motion in real-time
Keywords :
acoustic signal processing; elastic moduli measurement; motion estimation; ultrasonic imaging; ultrasonic measurement; 2D motion tracking; TDPE; axial motion component; correlation monitoring technique; lateral motion component; real time lateral displacement estimation; recovery search; speckle tracking; time domain cross correlation with prior estimates; Capacitive sensors; Computational efficiency; Decorrelation; Frequency estimation; Monitoring; Motion estimation; Radio frequency; State estimation; Tracking; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 2006. IEEE
Conference_Location :
Vancouver, BC
Print_ISBN :
1-4244-0201-8
Electronic_ISBN :
1051-0117
DOI :
10.1109/ULTSYM.2006.309
