import java.awt.image.BufferedImage;  import java.io.File;  import javax.imageio.ImageIO;    /**   * 比较两张图片的相似度   * @author Guihua   *   */  public class BMPLoader {   // 改变成二进制码   public static String[][] getPX(String args) {    int[] rgb = new int[3];      File file = new File(args);    BufferedImage bi = null;    try {     bi = ImageIO.read(file);    } catch (Exception e) {     e.printStackTrace();    }      int width = bi.getWidth();    int height = bi.getHeight();    int minx = bi.getMinX();    int miny = bi.getMinY();    String[][] list = new String[width][height];    for (int i = minx; i < width; i++) {     for (int j = miny; j < height; j++) {      int pixel = bi.getRGB(i, j);      rgb[0] = (pixel & 0xff0000) >> 16;      rgb[1] = (pixel & 0xff00) >> 8;      rgb[2] = (pixel & 0xff);      list[i][j] = rgb[0] + "," + rgb[1] + "," + rgb[2];       }    }    return list;     }      public static void compareImage(String imgPath1, String imgPath2){    String[] images = {imgPath1, imgPath2};    if (images.length == 0) {     System.out.println("Usage >java BMPLoader ImageFile.bmp");     System.exit(0);    }      // 分析图片相似度 begin    String[][] list1 = getPX(images[0]);    String[][] list2 = getPX(images[1]);    int xiangsi = 0;    int busi = 0;    int i = 0, j = 0;    for (String[] strings : list1) {     if ((i + 1) == list1.length) {      continue;     }     for (int m=0; m<strings.length; m++) {      try {       String[] value1 = list1[i][j].toString().split(",");       String[] value2 = list2[i][j].toString().split(",");       int k = 0;       for (int n=0; n<value2.length; n++) {        if (Math.abs(Integer.parseInt(value1[k]) - Integer.parseInt(value2[k])) < 5) {         xiangsi++;        } else {         busi++;        }       }      } catch (RuntimeException e) {       continue;      }      j++;     }     i++;    }      list1 = getPX(images[1]);    list2 = getPX(images[0]);    i = 0;    j = 0;    for (String[] strings : list1) {     if ((i + 1) == list1.length) {      continue;     }     for (int m=0; m<strings.length; m++) {      try {       String[] value1 = list1[i][j].toString().split(",");       String[] value2 = list2[i][j].toString().split(",");       int k = 0;       for (int n=0; n<value2.length; n++) {        if (Math.abs(Integer.parseInt(value1[k]) - Integer.parseInt(value2[k])) < 5) {         xiangsi++;        } else {         busi++;        }       }      } catch (RuntimeException e) {       continue;      }      j++;     }     i++;    }    String baifen = "";    try {     baifen = ((Double.parseDouble(xiangsi + "") / Double.parseDouble((busi + xiangsi) + "")) + "");     baifen = baifen.substring(baifen.indexOf(".") + 1, baifen.indexOf(".") + 3);    } catch (Exception e) {     baifen = "0";    }    if (baifen.length() <= 0) {     baifen = "0";    }    if(busi == 0){     baifen="100";    }      System.out.println("相似像素数量：" + xiangsi + " 不相似像素数量：" + busi + " 相似率：" + Integer.parseInt(baifen) + "%");     }     public static void main(String[] args){    BMPLoader.compareImage("E:\\12.bmp", "E:\\1.bmp");   }  }