转自:http://blog.csdn.net/hei_ya/article/details/51387624
在生成训练集的时通常需要对文件夹中图片进行批处理,本文简要介绍图像批量读取、处理、保存的方法。
方法一:
1.生成图片描述文件
对于有多幅图像的文件夹,首先生成txt文件,保存图片路径。
在DOS模式下导入文件夹路径并生成TXT文件:
2.通过TXT批量处理图片
<span style="font-size:18px;">#include<opencv2/opencv.hpp>
#include<iostream>
#include<time.h>
#include<fstream>
using namespace std;
using namespace cv;
void main()
{
ifstream file("C:/Users/Administrator/Desktop/date/MIT/MIT人脸库/faces/face.txt");
int img_index = 0;
while (!file.eof())
{
char txt_cont[200];
file.getline(txt_cont,200);
char img_file[200],save_file[200];
sprintf(img_file, "C:/Users/Administrator/Desktop/date/MIT/MIT人脸库/faces/%s", txt_cont);
sprintf(save_file, "C:/Users/Administrator/Desktop/date/MIT/MIT人脸库/save/%d.jpg", img_index);
Mat src = imread(img_file);
img_index++;
imwrite(save_file,src);
}
}</span>
方法二:
利用Directory类实现文件夹中特定格式图像的遍历,Directory的头文件是windows.h。
#include<opencv2/opencv.hpp>
#include<iostream>
#include<vector>
#include<string>
#include <windows.h>
using namespace std;
using namespace cv;
void main()
{
Directory dir;
string path1 = "C:\\Users\\Administrator\\Desktop\\date\\MIT\\MIT人脸库\\faces";
string exten1 = "*.bmp";
vector<string> filenames = dir.GetListFiles(path1, exten1, false);
int size = filenames.size();
for (int i = 0; i < size;i++)
{
cout << filenames[i] << endl;
}
}
2. Directory类定义为
class CV_EXPORTS Directory
{
public:
static std::vector<std::string> GetListFiles ( const std::string& path, const std::string & exten = "*", bool addPath = true );
static std::vector<std::string> GetListFilesR ( const std::string& path, const std::string & exten = "*", bool addPath = true );
static std::vector<std::string> GetListFolders( const std::string& path, const std::string & exten = "*", bool addPath = true );
};
具体用法如下,使用这个类时,应该加上contrib.hpp头文件
#include <iostream>
using namespace std;
#include <opencv2\opencv.hpp>
#include <opencv2\highgui\highgui.hpp>
#include <opencv2\contrib\contrib.hpp>
using namespace cv;
int main(int argc, char* argv[])
{
string dir_path = "D:\\opencv_pic\\test\\";
Directory dir;
vector<string> fileNames = dir.GetListFiles(dir_path, "*.jpg", false);
for(int i = 0; i < fileNames.size(); i++)
{
//get image name
string fileName = fileNames[i];
string fileFullName = dir_path + fileName;
cout<<"File name:"<<fileName<<endl;
cout<<"Full path:"<<fileFullName<<endl;
//load image
IplImage* srcImg = cvLoadImage(fileFullName.c_str(), CV_LOAD_IMAGE_UNCHANGED);
cvShowImage("src", srcImg);
cvWaitKey(0);
}
return 0;
}
参考:
http://blog.csdn.net/qq_34784753/article/details/68935628