Image Processing Reference

In-Depth Information

(4)

(5)

In Equation
(4)
, S
C
(
I
T
,
I
V
) is the similarity between an ST-image
I
T
and
I
V
.
I
T
is a template

ST-image.
I
V
is a part of ST-image from a video. NCol(
I
Tp
,
I
Vp
) is the normalized correlation

between
I
Tp
and
I
Vp
over a video
V
. The normalized correlation is normalized on the pair of the

template ST-image and the ST-image from a video over the video. Th
p
is the threshold.
p
is one

of
x
and
y
that represent the
X
-direction motion and
Y
-direction motion. This similarity meas-

ure is scalar.

Equation
(5)
is the formal definition of NCol. SD is a standard derivation over the video
V
.

Col is the correlation.

4.2 Similarity Measure in Motion Space-Time Image Based on

Absolute Differences

We use the absolute difference as the measure of similarity in the motion description. In the

case, we have two-dimensional absolute differences. They are the absolute differences based

on both of
X
-direction motion and
Y
-direction motion. If there is a similar motion between the

template and the retrieved part of the ST image, both of the two absolute differences are small.

We use the similarity measure shown in the following equation:

(6)

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