java获取图片每个像素点的RGB

 /**

      * 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。