678326.fig.009a
(a)
678326.fig.009b
(b)
678326.fig.009c
(c)
678326.fig.009d
(d)
678326.fig.009e
(e)
678326.fig.009f
(f)
678326.fig.009g
(g)
678326.fig.009h
(h)
678326.fig.009i
(i)
678326.fig.009j
(j)
678326.fig.009k
(k)
678326.fig.009l
(l)
Figure 9: Dragon image erosion (a/e/i), dilation (b/f/j), opening (c/g/k), and closing (d/h/l) with a disk of radius 3 pixels. Usual morphological gray level operations on the intensity image (a to d) and conversion to gray of the results for the color image using our method (e to h) and the method of Angulo (i to l) choosing black as the reference color.