added an example of using cv::VideoCapture to read image sequences like 000.pmg,…

added an example of using cv::VideoCapture to read image sequences like 000.pmg, 001.png ... 100.png etc.

samples/cpp/starter_image_sequence.cpp

+/*
+* starter_image_sequence.cpp
+*
+*  Created on: July 23, 2012
+*      Author: Kevin Hughes
+*
+* A simple example of how to use the built in functionality of cv::VideoCapture to handle
+* sequences of images. Image sequences are a common way to distribute data sets for various
+* computer vision problems, for example the change detection data set from CVPR 2012
+* http://www.changedetection.net/
+*
+*/
+
+#include <opencv2/core/core.hpp>
+#include <opencv2/highgui/highgui.hpp>
+
+#include <iostream>
+
+using namespace cv;
+using namespace std;
+
+void help(char** argv) 
+{
+    cout << "\nThis program gets you started reading a sequence of images using cv::VideoCapture.\n"
+         << "Image sequences are a common way to distribute video data sets for computer vision.\n"
+         << "Usage: " << argv[0] << " <path to the first image in the sequence>\n"
+         << "example: " << argv[0] << " right%%02d.jpg\n"
+         << "q,Q,esc -- quit\n"
+         << "\tThis is a starter sample, to get you up and going in a copy pasta fashion\n"
+         << endl;
+}
+
+int main(int argc, char** argv)
+{
+    if(argc != 2) 
+    {
+        help(argv);
+        return 1;
+    }
+
+    string arg = argv[1];
+    VideoCapture sequence(arg);
+    if (!sequence.isOpened())
+    {
+        cerr << "Failed to open Image Sequence!\n" << endl;
+        return 1;
+    }
+    
+    Mat image;
+    namedWindow("Image | q or esc to quit", CV_WINDOW_NORMAL);
+    
+    for(;;)
+    {
+        sequence >> image;
+        if(image.empty())
+        {
+            cout << "End of Sequence" << endl;
+            break;
+        }
+        
+        imshow("image | q or esc to quit", image);
+
+        char key = (char)waitKey(500);
+        if(key == 'q' || key == 'Q' || key == 27)
+            break;
+    }
+
+    return 0;
+}