3[3]R N Czerwinski,D L Jones,et al.Ultrasound speckle reduction by directional median filtering[A].Proc.of IEEE Int.Conf.Image Processing[C].Wasington,DC,1995.358-361.
4[4]T Loupas,W N Mcdicken,et al.An adaptive weighted median filter for speckle suppression in medical ultrasonic images[J].IEEE Trans.Circuits Syst.,1989,36(1):129-135.
5[5]R N Czerwinski,D L Jones,et al.An approach to boundary detection in ultrasound imaging[A].Proc.of IEEE Ultrasonic Symp [C].Baltimore,MD,1993.951-955.
6[6]R N Czerwinski,D L Jones,et al.Edge detection in ultrasound speckle noise[A].Proc.of IEEE Int.Conf.Image Processing[C].Austin,TX,1994.304-308.
7[7]R N Czerwinski,D L Jones,et al.Detection of lines and boundaries in speckle images-application to medical ultrasound[J].IEEE Trans.Med.Imag.,1999,18(2):126-136.
9[9]S Ghofrani,M R Jahed-Motlagh,et al.An adaptive speckle suppression filter based on Nakagami distribution[A].Proc.of IEEE Int.Conf.Trends in Communications[C].Bratislava,slovakia,2001.84-87.
10[10]K Z Abd-Elmoniem,Y M Kadah,et al.Real time adaptive ultrasound reduction and coherence enhancement[A].Proc.of the IEEE Int.Conf.on Image Processing[C].Vancouvea,BC,Canada,2000.172-175.
