adding two simple templates

samples/cpp/starter_imagelist.cpp

@@ -0,0 +1,78 @@
+/*
+ * starter_imagelist.cpp
+ *
+ *  Created on: Nov 23, 2010
+ *      Author: Ethan Rublee
+ *
+ * A starter sample for using opencv, load up an imagelist
+ * that was generated with imagelist_creator.cpp
+ * easy as CV_PI right?
+ */
+#include <opencv2/opencv.hpp>
+#include <vector>
+
+using namespace cv;
+using namespace std;
+
+//hide the local functions in an unnamed namespace
+namespace
+{
+void help(char** av)
+{
+  cout << "usage:" << av[0] << " image_list.yaml\n"
+       << "\tThis is a starter sample, to get you up and going in a copy pasta fashion.\n"
+       << "\tThe program reads in an list of images from a yaml or xml file and displays\n"
+       << "one at a time\n"
+       << "\tTry running imagelist_creator to generate a list of images." << endl;
+
+}
+
+bool readStringList(const string& filename, vector<string>& l)
+{
+  l.resize(0);
+  FileStorage fs(filename, FileStorage::READ);
+  if (!fs.isOpened())
+    return false;
+  FileNode n = fs.getFirstTopLevelNode();
+  if (n.type() != FileNode::SEQ)
+    return false;
+  FileNodeIterator it = n.begin(), it_end = n.end();
+  for (; it != it_end; ++it)
+    l.push_back((string)*it);
+  return true;
+}
+
+int process(vector<string> images)
+{
+  namedWindow("image",CV_WINDOW_KEEPRATIO); //resizable window;
+  for (size_t i = 0; i < images.size(); i++)
+  {
+    Mat image = imread(images[i], CV_LOAD_IMAGE_GRAYSCALE); // do grayscale processing?
+    imshow("image",image);
+    cout << "Press a key to see the next image in the list." << endl;
+    waitKey(); // wait indefinitely for a key to be pressed
+  }
+  return 0;
+}
+
+}
+
+int main(int ac, char** av)
+{
+
+  if (ac != 2)
+  {
+    help(av);
+    return 1;
+  }
+  std::string arg = av[1];
+  vector<string> imagelist;
+
+  if (!readStringList(arg,imagelist))
+  {   
+    cerr << "Failed to read image list" << endl;
+    return 1;
+  }
+
+  return process(imagelist);
+}