Biomedical Engineering Reference
In-Depth Information
Figure 14.
An example of computing
C
d
: (a) reference image; (b) moving image; (c) after
registering (b) to (a) the contour difference is obtained.
(
x, y
) in the current image, and the most similar block in the previous image is
at (
x
+
m, y
+
n
), then the motion vector for block (
x, y
) is (
m, n
). Hence, the
shift distance
M
d
(
I
k
,I
j
) between two neighboring images
{
I
k
,I
j
}
can be ob-
tained. (For more details, the reader is referred to Richardson [43].) For each
breast case, the total shift distance is defined as the maximum value of each
M
d
(
I
s×
8+1
,I
s×
8+9
):
M
d
= max
{k,j}
(
M
d
(
I
k
,I
j
))
.
(16)
