[ ][ ] and if-statement not working in code

I have some problems in the below code regarding the if-statement and possibly the 2D arrays, which I state below:

int[][]image =
    {
        {0,0,2,0,0,0,0,0,0,0,0,2},
        {0,0,0,0,0,0,0,0,0,0,0,0},
        {0,0,5,5,5,5,5,5,5,5,0,0},
        {0,0,5,5,5,5,5,5,5,5,0,0},
        {0,0,5,5,5,5,5,5,5,5,0,0},
        {2,0,5,5,5,5,5,5,5,5,0,2},
        {0,0,5,5,5,5,5,5,5,5,0,0},
        {0,0,5,5,5,5,5,5,5,5,0,0},
        {0,0,5,5,5,5,5,5,5,5,0,0},
        {0,0,5,5,5,5,5,5,5,5,0,0},
        {0,0,0,0,0,0,0,0,0,0,0,0},
        {0,0,0,0,2,0,0,0,0,0,0,0}//assume this rectangular image
    };  

    int[][]smooth = new int[image.length][image[0].length]; //new array equal to image[][]

Notice image[][]. It is a 2D array composed of a series of numbers. Below it, I initialize an identical array: smooth[][]. Each of smooth[][]'s elements are replaced with the numerical average of the 8 bordering elements plus itself.

The edge elements in smooth[][] (elements on outside border of array) should not be changed.

I attempt to do this with if-statements, but am only half successful. The numbers on the top and left borders do not change (r == 0 || c == 0), but any number on the bottom or right border will change to become the average value.

    //compute the smoothed value of non-edge locations in smooth[][]

    for(int r=0; r<image.length-1; r++)     
    {// x-coordinate of element

    for(int c=0; c<image[r].length-1; c++)      
    { //y-coordinate of element

    int sum1 = 0;//sum of each element's 8 bordering elements and itself



    if(r == 0 || c == 0 || r == (image[c].length) || c == (image[r].length))
        smooth[r][c] = image[r][c]; 

    else        
    {

        sum1 = image[r-1][c-1] + image[r-1][c] + image[r-1][c+1]    
        + image[r][c-1] + image[r][c] + image[r][c+1] +image[r+1][c-1] 
        + image[r+1][c] + image[r+1][c+1];

        smooth[r][c]= sum1 / 9; //average of considered elements becomes new elements