matlab 鼠标自定义选中图像的任意区域

偏执的太偏执、 2022-09-06 10:14 421阅读 0赞

在图片上，使用鼠标选点的方式，截取出任意形状包围的区域。

废话不多说，直接上代码：

%鼠标选中特定区域（支持单个区域选取）
    clc;clear all;close all;
    load matlab.mat
    I1=I;
    figure,imagesc(I1);
    hold on
    [x,y,flag]=ginput(1);
    m(1)=x;
    n(1)=y;
    k=2;
    while(flag==1)
        [x1,y1,flag1]=ginput(1);
        if flag1==1
            m(k)=x1;n(k)=y1;
            line([m(k-1) m(k)],[n(k-1) n(k)],'color','r');
            k=k+1;
            flag=flag1;
        else
            break
        end
    end
    line([m(k-1) m(1)],[n(k-1) n(1)],'color','r');
    BW = roipoly(I1,m,n); 
    mask=uint8(BW);
    figure,imagesc(mask);            %生成的标签
    save('C:\Users\Desktop\新建文件夹\代码\mask.mat','mask');%保存标签
    
    I2=double(I1).*double(BW);
    % figure,imagesc(I2);

结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwODE1MjM3_size_16_color_FFFFFF_t_70][]

代码来源：[https://www.ilovematlab.cn/thread-111922-1-1.html][https_www.ilovematlab.cn_thread-111922-1-1.html]

一些别的方法：[https://blog.csdn.net/u010125984/article/details/110498768][https_blog.csdn.net_u010125984_article_details_110498768]

本代码仅支持单个区域的选取，对于多个区域的选取代码请参见：

[https://download.csdn.net/download/qq\_30815237/21380236][https_download.csdn.net_download_qq_30815237_21380236]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwODE1MjM3_size_16_color_FFFFFF_t_70]: /images/20220829/15d187b73c2949f397b765cae8d21c62.png
[https_www.ilovematlab.cn_thread-111922-1-1.html]: https://www.ilovematlab.cn/thread-111922-1-1.html
[https_blog.csdn.net_u010125984_article_details_110498768]: https://blog.csdn.net/u010125984/article/details/110498768
[https_download.csdn.net_download_qq_30815237_21380236]: https://download.csdn.net/download/qq_30815237/21380236