Filling Polygons in a 2D Matrix

Hello,

I am having a problem filling arbitrary “polygons” within a 2D matrix with a particular value. Any help would be greatly appreciated.

Basically, I have large 2D matrix filled with 0’s and 1’s. The 1’s form the edges of polygons within the matrix. Given a particular index/point within the matrix, I want to fill the area around it (bounded by 1’s) with a particular value.

E.g.

Matrix =

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

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

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

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

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

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

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

If I select a point within the matrix (will be a 0), for this example (4,11) and select a flood value of 8. I want the output to be

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

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

0 0 0 0 0 0 1 8 8 8 8 8 8 1 1 1 1 1 1

0 0 0 0 0 0 0 1 8 8 8 8 8 1 0 0 0 0 0

1 1 1 1 1 1 1 1 1 8 8 8 8 1 0 0 0 0 0

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

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Thanks in advance,

Andrew