how to code the following program in MATLAB 2010

Open a gray scale image file

store image height to m and width to n, respectively

declare two 2-D Matrices, namely, matrix[m][n], matrix1[m][n]

declare integer, a1=0, a2=0, a3=0, a4=0, a5=0

read pixel one by one until end of file

for(int i=0; i<m;++i)

{

for(int j=0;j<n;++j)

{

matrix[i][j] = bi.getRGB(i,j);

matrix1[i][j] = bi.getRGB(i,j);

}

}

for(int r = 1; r < m-1; r++)

{

for(int c = 1; c < n-1; c++)

{

if((((matrix[r-1][c] == a1 ) && (matrix[r][c-1] == a2 ))

&& ((matrix[r-1][c] == a4) && (matrix[r][c+1] == a2 )))

&& (((matrix[r+1][c] == a4) && (matrix[r][c-1] == a2 ))

&& ((matrix[r+1][c] == a4) && (matrix[r][c+1] == a2 )))

&& (matrix[r][c] == a5))

matrix1[r][c] = 255;

}

}

write matrix1[m][n] to another image file

In this algorithm, each and every pixel is checked with its neighbor pixels. If all neighbors are black or 0 then make the pixel white or 255. We can say the concern pixel will die.