finding interior region

Hi I have the following code and have some output as follows:

I =

     0     1     1     1     1     1     0
     1     0     0     0     0     0     1
     1     0     1     1     1     0     1
     1     0     1     1     1     0     1
     1     0     0     0     0     0     1
     0     1     1     1     1     1     0

K>> boundary = bwboundaries(I,8,'noholes'); K>> boundary

boundary =

    [19x2 double]
    [ 7x2 double]

here is two boundary, I need to know how to determine which boundary is interior, Here [ 7x2 double] is in interior region of [19x2 double]. How to determine that easily?

Can anybody help?

Thanks

Answer 1

[Andrei Bobrov]

>> [B,L] = bwboundaries(I,8,'noholes')
B = 
    [19x2 double]
    [ 7x2 double]
L =
     0     1     1     1     1     1     0
     1     0     0     0     0     0     1
     1     0     2     2     2     0     1
     1     0     2     2     2     0     1
     1     0     0     0     0     0     1
     0     1     1     1     1     1     0
>>

B{1} -> label 1 (L == 1)

B{2} -> label 2 (L == 2)

EDIT 2

>> [B,L,N,A] = bwboundaries(I,8,'noholes')
B = 
    [19x2 double]
    [ 7x2 double]
L =
     0     1     1     1     1     1     0
     1     0     0     0     0     0     1
     1     0     2     2     2     0     1
     1     0     2     2     2     0     1
     1     0     0     0     0     0     1
     0     1     1     1     1     1     0
N =
     2
A =
   (2,1)        1
>> full(A)
ans =
     0     0
     1     0

Having label 2 (number row A = 2) inside label 1(column number 1of matrix A)

[Mohammad Golam Kibria]

It will give the position but I need to know is there any

idea to compare that label2 is inside lable1

[Andrei Bobrov]

Dear Mohammad! Please reading help function 'bwboundaries'.

[Mohammad Golam Kibria]

Thanks, Now It is clear

Answer 2

[Sean de Wolski]

You could also do an

Ibwnoholes = imfill(I,'holes');

which will fill the holes and then that boundary won't show up.