Figure 4

Segmentations for the noise ultrasound image (size: $\mathbf{481}\mathbf{\times }\mathbf{403}$). (a) The original image. (b) The smooth image by Gaussian low-pass filter with $\sigma =1.5$. (c) Smoothed ultrasound image with the AOS scheme ($\tau =6$, $\alpha =0.9$, twice iterations). (d) Algorithm DE-GLS. (e) Algorithm GLF-GLS. (f) CVM. (g)-(i) The segmentation counter of Algorithm DE-GLS, Algorithm GLF-GLS and CVM, respectively.