实验三：车牌分割程序

gaohaikuo1

1. I = imread('car.jpg');
   
2. subplot(4,3,1); imshow(I);
   
3. %灰度化
   
4. I_gray = rgb2gray(I);
   
5. subplot(4,3,2); imshow(I_gray);
   
6. %I_zone = I(:,:,3)-I(:,:,1)-I(:,:,2);
   
7. I_zone = (I(:,:,3)>100)&(I(:,:,1)<100)&(I(:,:,2)<100);
   
8. subplot(4,3,3); imshow(I_zone,[]);
   
9. se = strel('disk',3);  %structure element结构元素
   
10. I_zone1 = imerode(I_zone,se);%腐蚀
    
11. I_zone2 = imdilate(I_zone1,se);%膨胀
    
12. subplot(4,3,4); imshow(I_zone2,[]);
    
13. [i,j] = find(I_zone2 == 1);
    
14. left = min(j);
    
15. right = max(j);
    
16. upper = min(i);
    
17. lower = max(i);
    
18. I_zone3 = I_gray(upper:lower,left:right);
    
19. subplot(4,3,5); imshow(I_zone3,[]);
    
20. I_bw = I_zone3 >150;
    
21. subplot(4,3,6); imshow(I_bw,[]);
    
22. I_bw1 = bwareaopen(I_bw,20);
    
23. subplot(4,3,7); imshow(I_bw1,[]);
    
24. line = 1;
    
25. %获取汉字冀
    
26. [line1,line2,line] = getEdge(line,I_bw1)
    
27. I1 = I_bw1(:,line1:line2);
    
28. subplot(4,3,8); imshow(I1,[]);
    
29. %获取字母R
    
30. [line1,line2,line] = getEdge(line,I_bw1)
    
31. I2 = I_bw1(:,line1:line2);
    
32. subplot(4,3,9); imshow(I2,[]);
    
33. [line1,line2,line] = getEdge(line,I_bw1)
    
34. I3 = I_bw1(:,line1:line2);
    
35. subplot(4,3,10); imshow(I3,[]);
    
36. [line1,line2,line] = getEdge(line,I_bw1)
    
37. I4 = I_bw1(:,line1:line2);
    
38. subplot(4,3,11); imshow(I4,[]);
    
39. [line1,line2,line] = getEdge(line,I_bw1)
    
40. I5 = I_bw1(:,line1:line2);
    
41. subplot(4,3,12); imshow(I5,[]);
    
42. [line1,line2,line] = getEdge(line,I_bw1)
    
43. I2 = I_bw1(:,line1:line2);

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gaohaikuo1

1. function [line1,line2,line ] = getEdge(line,I_bw1)
   
2. %从左边向右扫描至字符的左边缘
   
3. while sum(I_bw1(:,line)) == 0
   
4.     line = line+1;
   
5. end
   
6. line1 = line;
   
7. %从左边向右扫描至字符的右边缘
   
8. while sum(I_bw1(:,line)) > 0
   
9.     line = line+1;
   
10. end
    
11. line2 = line;

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