批量读取某一文件下所有图片或者其他文件

只要利用void getFiles(string path, vector& files)这个函数就可以了，前提是工程中一定要加#include

#include <opencv2/opencv.hpp>  
#include <opencv2/highgui/highgui.hpp>  
#include <opencv2/core/core.hpp>  
#include <io.h> //查找文件相关函数


using namespace std;
using namespace cv;

Mat g_SrcImage;
int main()
{
    void getFiles(string path, vector<string>& files);
    char * filePath = "E:\\SVM_train_data\\positive\\train";
    vector<string> files;
    getFiles(filePath, files);
    int number = files.size();
    printf("图片个数为%d\n", number);
    for (int i = 0; i < number; i++)
    {
        cout << files[i].c_str() << endl;
        g_SrcImage = imread(files[i].c_str());
        imshow("11", g_SrcImage);
        waitKey(500);
    }
    getchar();
}

void getFiles(string path, vector<string>& files)
{
    intptr_t   hFile = 0;
    struct _finddata_t fileinfo;
    string p;
    if ((hFile = _findfirst(p.assign(path).append("\\*").c_str(), &fileinfo)) != -1)
    {
        do
        {
            if ((fileinfo.attrib &  _A_SUBDIR))
            {
                if (strcmp(fileinfo.name, ".") != 0 && strcmp(fileinfo.name, "..") != 0)
                    getFiles(p.assign(path).append("\\").append(fileinfo.name), files);
            }
            else
            {
                files.push_back(p.assign(path).append("\\").append(fileinfo.name));
            }
        } while (_findnext(hFile, &fileinfo) == 0);

        _findclose(hFile);
    }
}

效果图