学步园

（一）支持win32控制台程序

void processCharSize(string path)
{
	//string path = "H:\\back\\data";
	vector<string> files;
	//文件句柄
	long   hFile   =   0;
	//文件信息
	struct _finddata_t fileinfo;
	string p;
	if((hFile = _findfirst(p.assign(path).append("\\*").c_str(),&fileinfo)) !=  -1)
	{
		do
		{
			//如果是目录,迭代之
			//如果不是,加入列表
			if((fileinfo.attrib &  _A_SUBDIR))
			{
				if(strcmp(fileinfo.name,".") != 0  &&  strcmp(fileinfo.name,"..") != 0)
					processCharSize( p.assign(path).append("\\").append(fileinfo.name)/*, files*/ );
			}
			else
			{
				//files.push_back(p.assign(path).append("\\").append(fileinfo.name) );
				string newFileName = p.assign(path).append("\\").append(fileinfo.name);

				Mat oldImg = imread(newFileName,0); // 0 代表读取的是灰度图像
				threshold(oldImg,oldImg,THRESH_OTSU | THRESH_BINARY,1)
					Mat newImg ;

				//copyMakeBorder(oldImg,newImg,2,2,2,2,BORDER_CONSTANT,Scalar(0));
				//resize(newImg,newImg,Size(20,20));		// 图像边缘填充后，再resize到指定大小

				copyMakeBorder(oldImg,newImg,1,3,1,3,BORDER_CONSTANT,Scalar(0));
				resize(newImg,newImg,Size(20,20));

				//resize(oldImg,newImg,Size(20,20));	// 直接将图像resize到指定大小
				imwrite(newFileName,newImg);
			}
		}while(_findnext(hFile, &fileinfo)  == 0);
		_findclose(hFile);
	}
}

（二）MFC应用程序支持，Win32控制台程序不支持

void GenFileNameList( CString folder, vector<CString> &list )
{
	folder.TrimRight('\\');
	folder += '\\';

	CString filename;
	CFileFind finder;
	BOOL bWork = finder.FindFile(folder+"*.*");
	vector<CString> namelist;
	while(bWork)
	{
		bWork = finder.FindNextFile();
		if(finder.IsDirectory()==FALSE && !finder.IsDots())
		{
			filename =finder.GetFileName();
			/*clazzInfo clazz;
			clazz.id = subDir;
			clazz.path = filename;*/
			list.push_back(filename);
		}
		//bWork = finder.FindNextFile(); // bWork is zero if the file found is the last one

		//if (/*finder.IsDirectory() &&*/ !finder.IsDots())
		//{
		//	//open subdir 
		//	CString subDir  = finder.GetFileName();
		//	CFileFind subFinder;
		//	BOOL subBWork = subFinder.FindFile(folder+subDir+"\\"+"*.*");
		//	while (subBWork)
		//	{
		//		subBWork = subFinder.FindNextFile();
		//		if(subFinder.IsDirectory()==FALSE && !subFinder.IsDots())
		//		{
		//			filename =subFinder.GetFileName();
		//			/*clazzInfo clazz;
		//			clazz.id = subDir;
		//			clazz.path = filename;*/
		//			list.push_back(filename);
		//		}
		//	}
		//	subFinder.Close();
		//}
	}
	finder.Close();

}

非注释部分支持单层文件夹下的文件遍历，注释掉的部分支持文件夹嵌套。