imageload.cpp

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* Image, Video, and Usabilty (IVU) Lab, http://ivulab.asu.edu , Arizona State University
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#include <opencv2\imgproc\imgproc.hpp>
#include <opencv2\highgui\highgui.hpp>
#include "Common.h"

using namespace std;
using namespace cv;

/*loads a stack of 8 images, downsamples by 4 and converts to grayscale. imgptr is an output vector for storing stack*/
void loadimages(vector<Mat>& imgptr,String entirepath)
{
   /* path for input images,if path is different from the one mentioned, change entirepath to the folder containing images*/
   //String entirepath="input/table_image_set/table5_";
	
   ostringstream indx;    
   int numimg=8;
   cout<<"Reading input image files ...."<<"\n";
   for(int i=0;i<numimg;i++)
   {

      indx<<i+1;

      String indtxt=indx.str();

      String fullpath=entirepath+indtxt[i]+".jpg";

      Mat  temp;
      temp = imread(fullpath);
      if (temp.data == NULL)
      {
         cout << "Failed to read image file: " << fullpath << endl;
         system("pause");
         exit(-1);
      }
	  /*convert 3 channel to single channel*/
      cvtColor(temp,imgptr.at(i),CV_BGR2GRAY);
	  /*downsample by a factor of 4 */
      resize(imgptr.at(i), imgptr.at(i), Size( temp.cols/4, temp.rows/4), 0.25, 0.25, INTER_LINEAR);
      temp.release();
   }
}