Opencv系列8_opencv批量阈值分割JPG图像并显示保存

今天药忘吃喽~ 2022-09-03 03:29 245阅读 0赞

# **实例8：opencv批量阈值分割JPG图像并显示保存** #

#include <iostream>
    #include <io.h>  // 当中含有_finddata_t
    #include <string>
    #include <vector> 
    
    #include <opencv2/core/core.hpp>
    #include <opencv2/highgui/highgui.hpp>
    #include <opencv2/imgproc/imgproc.hpp>
    
    #define NUMBER 80 //(JPG文件数量为NUMBER-1)
    
    using namespace std;
    using namespace cv;
    
    void Threshold_Demo(vector<Mat> imag)
    {
    	char ad[128] = { 0 };
    	Mat gray_src,dst;
    	const char* output_title = "binary image";//定义输出标题为二进制图像
    	for(int i=0;i<imag.size();i++)//
    	{
    		cvtColor(imag[i], gray_src, CV_BGR2GRAY);//RGB图像对象src转换为灰度图像对象gray_src
    		//imshow("GRAY", gray_src);//显示灰度图像
    		threshold(gray_src, dst, 178, 255, THRESH_BINARY);//对gray_src阈值分割，阈值设置为178
    
    		//保存阈值分割后图像
    		sprintf_s(ad, "F:\\Software\\VTK8.2.0\\vtk1\\helloVtk\\JPG_threshold\\threshold_%d.jpg", i+1);
    		imwrite(ad, dst);
    
    		namedWindow(output_title, CV_WINDOW_AUTOSIZE);
    		imshow(output_title, dst);
    		waitKey();//键盘任意键关闭
    	}
    	
    }
    int main()
    {	
    		vector<Mat> images;
    		for (int a = 1; a < NUMBER;a+=10)  // a <=Count would do one too many...
    		{
    			string filename = format("F:\\Software\\VTK8.2.0\\vtk1\\helloVtk\\JPG_images\\%d.jpg", a);//JPG文件的存储路径
    			Mat img = imread(filename); //读取图像
    			if (img.empty())      // 如果图像为空
    			{
    				cerr << "whaa " << filename << " can't be loaded!" << endl;
    				continue;   
    			} 
    			images.push_back(img);//图像保存进容器
    		}
    		//进行批量阈值分割与保存
    		Threshold_Demo(images);
    		return 0;
    }

原图像和阈值设定阈值分割后的图像：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70][] ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70 1][] ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70 2][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70 3][] ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70 4][] ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70 5][]

阈值分割后保存图像：

![20210421134731500.png][]

**[本例程配套素材见源码整理文章下载（点击进入）][Link 1]**

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20210421134322448.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/2021042113441685.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70 2]: /images/20220829/6c278915958b46db8020e83a3f1badc9.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20210421133149706.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70 4]: https://img-blog.csdnimg.cn/20210421133228731.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyODA5MDkz_size_16_color_FFFFFF_t_70 5]: /images/20220829/206cdcd2deb34e84ba86ff436fd77e9c.png
[20210421134731500.png]: /images/20220829/cb37c4b97039401597c2b52c35f0b6fe.png
[Link 1]: https://blog.csdn.net/qq_32809093/article/details/115689942