1 1 2

1

2

hmainText

Ncol

=height

mainText

4

2XNcol

10s

Kopt

=

1 1 . . . 11 1 . . . 1

�

AND OR

Ar

Ar

=w

horA

r

=h

w

Df

Df

=N

f

N

Dc

Dc

=N

extractedC

NtotalC

[00110011110011100] 0 12 4 3