OpenCV自带方法遍历目录下文件

以前一直用C语言遍历目录下图像文件来获取图像名称，才知道opencv自带的类Directory实现了这个功能。

Directory定义于contrib.hpp（v2.0以上），定义很简单就三个函数：

class CV_EXPORTS Directory
{
public:
	static std::vector GetListFiles  ( const std::string& path, const std::string & exten = "*", bool addPath = true );
	static std::vector GetListFilesR ( const std::string& path, const std::string & exten = "*", bool addPath = true );
	static std::vector GetListFolders( const std::string& path, const std::string & exten = "*", bool addPath = true );
};

使用起来也很简单：

// Use opencv built-in methods to get image filenames of specified folder.

#include 
using namespace std;

#include 
#include 
#include 
using namespace cv;

int main(int argc, char* argv[])
{
	string dir_path = "D:\\opencv_pic\\test\\";
	Directory dir;
	vector 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:"<

结果：