Matlab中如何只把figure中的图像区域保存为图片文件

sinmr

Matlab中如何只把figure中的图像区域保存为图片文件


[ 本帖最后由 eight 于 2008-5-14 15:29 编辑 ]

wwbeyondww

好像除了拷屏,
其它的方法都只是把图像区域保存的吧

sigma665

save as?

wwbeyondww

那就多了
edit-->copy figure
save as
export setup-->export

wxl789

alt+printscrean
这个是只拷当前活动窗口

大混子

呵呵
用qq截图
:lol

lxq

1. %%%%矩形区域选取%%%%%
   
2. hf = figure(1);
   
3. A = imread('board.tif');
   
4. A = rgb2gray(A); %-此句注释后下面的处理就相当于对真彩色图像进行
   
5. imshow(A)
   
6. rect = getrect(hf);
   
7. w = round(rect(3));
   
8. h = round(rect(4));
   
9. if w >= 1 & h >= 1
   
10. r = [rect(1),rect(1)+w,rect(1)+w,rect(1);rect(2),rect(2),rect(2)+h,rect(2)+h];
    
11. rectangle('Position',[rect(1),rect(2),w,h], 'edgecolor','red');
    
12. figure(2);
    
13. bw = roipoly(A,r(1,:),r(2,:));
    
14. AA = reshape(A, [(size(A,1)*size(A,2)), size(A,3)]);
    
15. BB = AA(bw, :);
    
16. B = reshape(BB, [h, w, size(A,3)]);
    
17. imshow(B);
    
18. end
    
19. 
    
20. %%%%任意形状区域选取%%%%%
    
21. 
    
22. clear all
    
23. A = imread('board.tif');
    
24. A = rgb2gray(A); %-此句注释后下面的处理就相当于对真彩色图像进行
    
25. figure(1)
    
26. imshow(A);
    
27. %[a,b] = ginput;
    
28. button = 1;
    
29. n = 0;
    
30. a = [];
    
31. b = [];
    
32. hold on;
    
33. while button == 1 % 输入数据点，以右键作结
    
34. [xi,yi,button] = ginput(1);
    
35. n = n + 1;
    
36. if n > 1
    
37. plot([xi,a(n-1,1)], [yi,b(n-1,1)], '-rs','LineWidth',1,...
    
38. 'MarkerEdgeColor','k',...
    
39. 'MarkerFaceColor','g',...
    
40. 'MarkerSize',10);
    
41. else
    
42. plot(xi, yi, 's','LineWidth',2,...
    
43. 'MarkerEdgeColor','k',...
    
44. 'MarkerFaceColor','g',...
    
45. 'MarkerSize',10);
    
46. end
    
47. a(n,1) = xi;
    
48. b(n,1) = yi;
    
49. end
    
50. plot([xi,a(1,1)], [yi,b(1,1)], '-rs','LineWidth',2,...
    
51. 'MarkerEdgeColor','k',...
    
52. 'MarkerFaceColor','g',...
    
53. 'MarkerSize',10);
    
54. hold off;
    
55. if length(a) >= 3
    
56. va = round(a);
    
57. vb = round(b);
    
58. 
    
59. x = 1:size(A,1);
    
60. y = 1:size(A,2);
    
61. 
    
62. [Y,X] = meshgrid(y,x);
    
63. in = inpolygon(Y(:),X(:),va,vb);
    
64. 
    
65. AA = reshape(A, [size(A,1)*size(A,2),size(A,3)]);
    
66. BB = repmat(uint8(255),size(AA));
    
67. BB(in,:) = AA(in,:);
    
68. B = reshape(BB, [size(A,1),size(A,2),size(A,3)]);
    
69. 
    
70. figure(2)
    
71. imshow(B);
    
72. end

复制代码

选自eight总结贴。

选出感兴趣的区域后，把figure文件保存为需要的格式即可。

sjh2100

以下命令仅取图像区域
f=getframe(gca);
imwrite(f.cdata,'f:\test2.png')