Acoustic time-frequency domain imaging.
The axial resolution of conventional acoustic micro imaging is limited by the wavelength of acoustic waves. Acoustic time-frequency domain imaging was recently proposed to overcome the wavelength limit [Zhang et al., J. Acoust. Soc. Am. 118, 3706-3720 (2005)]. A continuous wavelet transform based acoustic time-frequency domain imaging technique is investigated in this paper. Experiments are performed on real 3D data collected from microelectronic packages. Results demonstrate the proposed technique reveals more image details and enhances the image contrast in comparison with conventional time domain imaging.
General Engineering Research Institute, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, United Kingdom. g.zhang@ljmu.ac.uk
Guang-Ming
GM
Zhang
Derek R
DR
Braden
David M
DM
Harvey
David R
DR
Burton
D001695:Biology / Q000295:instrumentation / Q000379:methods*; D004581:Electronics / Q000295:instrumentation / Q000379:methods; D005583:Fourier Analysis; D008422:Materials Testing / Q000379:methods*; D008954:Models, Biological; D014465:Ultrasonics / Q000295:instrumentation / Q000379:methods*; D058067:Wavelet Analysis