Java 对二值化图片识别连通域

Posted 2020-10-19 zdmein

用Java 对 已经 二值化了的图片 标记连通域

每块的连通域都标记不一样的数字

 1     public static void main(String [] args) throws IOException {
 2         //二值化
 3         BufferedImage image = ImageIO.read(new File("F:/MyCode/LianTongYu/specialGray.jpg"));
 4         int w = image.getWidth();
 5         int h = image.getHeight();
 6 
 7         int rgb = image.getRGB(0, 0);
 8         int arr[][] = new int[h][w];
 9                  // 获取图片每一像素点的灰度值
10                  for (int i = 0; i < h; i++) {
11                          for (int j = 0; j < w; j++) {
12                                  // getRGB()返回默认的RGB颜色模型(十进制)
13                               //  arr[i][j] = image.getRGB(i, j) == -1 ？0 : 1 ;//该点的灰度值
14                              int tmp= image.getRGB(j, i);
15                              arr[i][j] =tmp==-1? 0:1;
16                              }
17                     }
18         int res=getCount(arr);
19         System.out.println(res);
20     }
21 
22     public static int getCount(int[][] A) {
23         int result = 0;
24         for (int i = 0; i < A.length; i++) {
25             for (int j = 0; j < A[0].length; j++) {
26                 if (A[i][j] == 1) {
27                     result++;
28                     erase(A, i, j,result+1);
29                 }
30             }
31         }
32 
33         // 统计数值
34         int arrsum[] = new int [result+2];
35         // 读取矩阵
36         for (int i = 0; i < A.length; i++) {
37             for (int j = 0; j < A[0].length; j++) {
38                 if(A[i][j]!=0)
39                 arrsum[A[i][j]]+=1;
40                System.out.print(A[i][j]+" ");
41                 }
42                 System.out.println();
43             }
44  
45             //输出统计的数值
46         for (int i = 0; i < arrsum.length; i++) {
47             System.out.println(arrsum[i]);
48         }
49 
50         return result;
51     }
52 
53     public static void erase(int[][] A, int i, int j,int res1) {
54         A[i][j] = res1;
55         while (i - 1 >= 0 && A[i - 1][j] == 1) {
56             erase(A, i - 1, j,res1);
57         }
58         while (i + 1 < A.length && A[i + 1][j] == 1) {
59             erase(A, i + 1, j,res1);
60         }
61         while (j - 1 >= 0 && A[i][j - 1] == 1) {
62             erase(A, i, j - 1,res1);
63         }
64         while (j + 1 < A[0].length && A[i][j + 1] == 1) {
65             erase(A, i, j + 1,res1);
66         }
67 
68     }
69 }

 

 

图片：

 

结果：

 

 

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