private int[][] dirs = new int[][]{{0,0}, {0,1}, {1,1}, {1,0}, {1,-1}, {0,-1}, {-1,0}, {-1,-1}, {-1,1}};

public int[][] imageSmoother(int[][] M) {

int lenI = M.length;

int lenJ = M[0].length;

int[][] newScale = new int[lenI][lenJ];

for (int i=0; i<lenI; i++) {

for (int j=0; j<lenJ; j++) {

int sum = 0;

int count = 0;

for (int[] dir: dirs) {

int ii = i+dir[0];

int jj = j+dir[1];

if (ii >= 0 && jj >= 0 && ii < lenI && jj < lenJ) {

sum += M[ii][jj];

count++;

}

}

newScale[i][j] = sum / count;

}

}

return newScale;

}