/**

      * 获取图片RGB数组
      * @param filePath
      * @return
      */
public int[][] getImageGRB(String filePath) {
           File file  = new File(filePath);
           int[][] result = null;
           if (!file.exists()) {
                return result;
           }
           try {
                BufferedImage bufImg = ImageIO.read(file);
                int height = bufImg.getHeight();
                int width = bufImg.getWidth();
                result = new int[width][height];
                for (int i = 0; i < width; i++) {
                     for (int j = 0; j < height; j++) {
                           result[i][j] = bufImg.getRGB(i, j) & 0xFFFFFF;
                           System.out.println(bufImg.getRGB(i, j) & 0xFFFFFF);
                           
                     }
                }
                
           } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
           }
           
           return result;
     }

备注：应为使用getRGB(i,j)获取的该点的颜色值是ARGB，而在实际应用中使用的是RGB，所以需要将ARGB转化成RGB，即bufImg.getRGB(i, j) & 0xFFFFFF。