<s>
Split	B-Algorithm
and	I-Algorithm
merge	I-Algorithm
segmentation	I-Algorithm
is	O
an	O
image	B-Algorithm
processing	I-Algorithm
technique	O
used	O
to	O
segment	B-Algorithm
an	O
image	O
.	O
</s>
<s>
The	O
technique	O
incorporates	O
a	O
quadtree	B-Data_Structure
data	O
structure	O
,	O
meaning	O
that	O
there	O
is	O
a	O
parent-child	O
node	O
relationship	O
.	O
</s>
<s>
The	O
following	O
example	O
shows	O
the	O
segmentation	B-Algorithm
of	O
a	O
gray	O
scale	O
image	O
using	O
matlab	O
.	O
</s>
