How to run the code repetitively and save result separately ?

edit

If you have not very large DB of pics (10-15 pics), the most easiest way to do it, is with bat file, that call your program and parse the input parameters (argc and **argv).

The other way is to use dirrent.h That is small example, that will do the job ;)

int check_ext(string path)   //only images
{
    string ext[]={"BMP","DIB","JPEG","JPG","JPE","PNG","PBM","PGM","PPM","SR","RAS","TIFF","TIF"
            ,"bmp","dib","jpeg","jpg","jpe","png","pbm","pgm","ppm","sr","ras","tiff","tif"};
    for(unsigned int i=0;i<(sizeof(ext)/sizeof(ext[0]));i++)
    {
        if(path.substr(path.find_last_of(".") + 1) == ext[i])return 1;
    }
    return 0;
}

//someware open files
if ((dir = opendir ((path).c_str())) != NULL)
{
    while ((ent = readdir (dir)) != NULL)
    {
        if(check_ext(ent->d_name))Mat img = imread(path+"\\"+ent->d_name);
        //processing               
        imwrite(outputdir+"\\"+ent->d_name,img);
    }
}

I guess the simplest way would be some while or for loop and put some sleep at the end of the loop, so that it wait until the next execution.

For the different images, you could do it like this. Take a simple image name and always concatenate it with a number in every loop. You could use the loop variable i or just increase an int after every loop.

Could look like this in c++:

    char *imageName = "image"; 
    char *jpgN = ".jpg";
    stringstream s;
    s << imageName << i << jpgN;

Then you can use imwrite (s.str(), image);