Figure 5

Segmentations of four models for four images with multiple objects of inhomogeneous intensities or inside holes, starting with a constant function${\mathbf{\psi }}_{\mathbf{0}}\mathbf{=}\mathbf{2}$. (a)-(d): original images. (e)-(h): results of the Canny algorithm (left to right: $\sigma =1,T=\left[0\text{.06,}0.17\right]$; $\sigma =2,T=\left[0\text{.05,}0.4\right]$; $\sigma =1,T=\left[0\text{.006,}0.3\right]$; $\sigma =1,T=\left[0\text{.006,}0.02\right]$). (i)-(l): results of the CV model (left to right: ${\lambda }_1=3.5$with 500 iterations, $\nu =0.015\times 255\times 255$ with 500 iterations, 10, 300 iterations). (m)-(p): results of the RSF model (left to right: ${\lambda }_1=1.2$with 600 iterations, $\nu =0.01\times 255\times 255$with 500 iterations, 500 iterations, ${\lambda }_1=1.5,\nu =0.002\times 255\times 255$ with 240 iterations). (q)-(t): results of our model (left to right: 21, 15, 10, 45 iterations). (u) and (x): 3D plots of final level set functions.