Speckle suppression by adaptive nonlinear filtering
International Symposium on VIPromCom Video/Image Processing and Multimedia Communications - Trang 163-166
Tóm tắt
Using a good statistical model of speckle formation is important in designing an adaptive filter for speckle reduction in ultrasound B-scan images. Most clinical ultrasound imaging systems use a nonlinear logarithmic function to reduce the dynamic range of the input echo signal and emphasize objects with weak backscatter. The statistic of log-compressed images for Nakagami distribution was derived (Ghofrani et al. 2001) and in this paper we use the results for designing an adaptive nonlinear filter in speckle reduction. We processed two original ultrasound images of kidney and liver to demonstrate the efficiency of the designed filter.
Từ khóa
#Speckle #Adaptive filters #Ultrasonic imaging #Filtering #Dynamic range #Backscatter #Statistical distributions #Nakagami distribution #Nonlinear filters #LiverTài liệu tham khảo
zamman, 1993, A comparison of adaptive filters for edge presserving smoothing of speckle noise, IEEE
10.1109/42.251119
chen, 1994, Non gussian versus non Rayleigh statistical properties of ultrasound echo signal, IEEE Trans Ultrasonics Ferroelect Freq Contr, 41
10.1109/ULTSYM.1993.339649
kaplan, 1993, On the statistical charactrictics of log-compressed Rayleigh signals, Ultrsonics Symp Proc
mohana, 2000, general statistical model for ultrasonic back scattering from tissues, IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, 47
10.1109/42.387710
10.1109/78.852013
10.1109/42.544498
10.1049/ip-vis:19951800
healy, 1993, Speckle reduction methods in ultrasound pulse echo imaging, 29
hao, 1999, A novel Multiscale nonlinear thresholding method for ultrasonic speckle suppressing, IEEE Trans Medical Imaging, 18
evans, 1993, Speckle filtering in ultrasound images for feature extraction, Acoustic Sensing and Imaging, 29
park, 1999, Speckle filtering of SAR images besed on adaptive windowing, IEEE Proc -Vis Image Process, 146, 10.1049/ip-vis:19990550
10.1109/83.265980
10.1109/EURCON.2001.937769
medeiros, 1993, Adaptive speckle MAP filtering for SAR images using statistical clustering, IEEE