# encoding: UTF-8
import glob as gb
import cv2

#Returns a list of all folders with participant numbers
img_path = gb.glob("numbers\\*.jpg") 
for path in img_path:
  img = cv2.imread(path) 
  cv2.imshow('img',img)
  cv2.waitKey(1000)

#include<opencv2\opencv.hpp>
#include<iostream>

using namespace std;
using namespace cv;

vector<Mat> read_images_in_folder(cv::String pattern);

int main()
{
  cv::String pattern = "G:/temp_picture/*.jpg";
  vector<Mat> images = read_images_in_folder(pattern);

  return 0;  
}

vector<Mat> read_images_in_folder(cv::String pattern)
{
  vector<cv::String> fn;
  glob(pattern, fn, false);

  vector<Mat> images;
  size_t count = fn.size(); //number of png files in images folder
  for (size_t i = 0; i < count; i++)
  {
    images.push_back(imread(fn[i]));
    imshow("img", imread(fn[i]));
    waitKey(1000);
  }
  return images;
}

#include<opencv2\opencv.hpp>
#include<iostream>
#include <windows.h> // for windows systems

using namespace std;
using namespace cv;

void read_files(std::vector<string> &filepaths,std::vector<string> &filenames, const string &directory);

int main()
{
  string folder = "G:/temp_picture/";
  vector<string> filepaths,filenames;
  read_files(filepaths,filenames, folder);
  for (size_t i = 0; i < filepaths.size(); ++i)
  {
    //Mat src = imread(filepaths[i]);
    Mat src = imread(folder + filenames[i]);
    if (!src.data)
      cerr << "Problem loading image!!!" << endl;
    imshow(filenames[i], src);
    waitKey(1000);
  }
  return 0;

}

void read_files(std::vector<string> &filepaths, std::vector<string> &filenames, const string &directory)
{
  HANDLE dir;
  WIN32_FIND_DATA file_data;

  if ((dir = FindFirstFile((directory + "/*").c_str(), &file_data)) == INVALID_HANDLE_VALUE)
    return; /* No files found */

  do {
    const string file_name = file_data.cFileName;
    const string file_path = directory + "/" + file_name;
    const bool is_directory = (file_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0;

    if (file_name[0] == '.')
      continue;

    if (is_directory)
      continue;

    filepaths.push_back(file_path);
    filenames.push_back(file_name);
  } while (FindNextFile(dir, &file_data));

  FindClose(dir);
} 

#include <boost/filesystem.hpp>
#include<iostream>
#include<opencv2\opencv.hpp>

using namespace cv;
using namespace std;
using namespace boost::filesystem;

void readFilenamesBoost(vector<string> &filenames, const string &folder);

int main()
{
  string folder = "G:/temp_picture/";
  vector<string> filenames;
  readFilenamesBoost(filenames, folder);
  for (size_t i = 0; i < filenames.size(); ++i)
  {
    Mat src = imread(folder + filenames[i]);

    if (!src.data)
      cerr << "Problem loading image!!!" << endl;
    imshow("img", src);
    waitKey(1000);
  }
  return 0;
}

void readFilenamesBoost(vector<string> &filenames, const string &folder)
{
  path directory(folder);
  directory_iterator itr(directory), end_itr;
  string current_file = itr->path().string();

  for (; itr != end_itr; ++itr)
  {
    if (is_regular_file(itr->path()))
    {
      string filename = itr->path().filename().string(); // returns just filename
      filenames.push_back(filename);
    }
  }
}