Image Scaling Method

public static void main(String[] args) {
        int[][] img = {
            {1,1,1,1,1,0,0,0,0,0},
            {1,1,1,1,1,0,0,0,0,0},
            {1,1,1,1,1,0,0,0,0,0},
            {1,1,1,1,1,0,0,0,0,0},
            {1,1,1,1,1,0,0,0,0,0},
            {1,1,1,1,1,0,0,0,0,0},
            {1,1,1,1,1,0,0,0,0,0},
            {1,1,1,1,1,0,0,0,0,0},
            {1,1,1,1,1,0,0,0,0,0},
            {1,1,1,1,1,0,0,0,0,0},
            {1,1,1,1,1,0,0,0,0,0},
            {1,1,1,1,1,0,0,0,0,0}
        };

        int[][] res = scale(img, 4, 4);
        // here res.length = 12(height) and res[0].length = 10(width)
        for (int i = 0; i < res[0].length; i++) {
            for (int j = 0; j < res.length; j++) {
                System.out.print(res[i][j] + " ");
            }
            System.out.println("");
        }
    }

    /*
    * Params:
    *   img => Image Matrix of RGB value
    *   w2 => New Width
    *   h2 => New Height
    */
    public static int[][] scale(int[][] img, int w2, int h2){
        int w1 = img.length;
        int h1 = img[0].length;
        int[][] output = new int[w2][h2];
        double x_ratio = (double)w1/w2;
        double y_ratio = (double)h1/h2;
        for(int i=0; i< w2; i++){
            for (int j = 0; j < h2; j++) {
                int rgb = img[(int)Math.floor(i*x_ratio)][(int)Math.floor(j*y_ratio)];
                output[i][j] = rgb;
            }
        }
        return output;
    }