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Fig. 21 The effect of the initialization on the segmentation accuracy of 12 CT images (ESP) using
A
1,
A
3, and ours.
x
0
and
y
0
represent
the initial point
in the X-direction and Y-direction
respectively w.r.t. the center of the object
2
n
Fig. 22 Segmentation results of an ESP CT slice with (a) no noise, noise variances (b)
= 0.1,
r
2
n
2
n
(c)
r
= 0.5. (i) The original gray level image with various noise levels. The
results of (ii) only the intensity based segmentation, (iii) the initial segmentation f
based on the
intensity and spatial interaction models, (iv) proposed method integrating three models (intensity,
interaction, and shape)
= 0.25, and (d)
r
