Reading files correctly - still not predicting the correct subject

FacialRec.cpp

@@ -73,7 +73,7 @@ int main() {
 				int i = 0;
 				while (true) {
 					filename = to_string(i);
-					string path = directory + subdirectory + filename + ".pgm";
+					string path = directory + subdirectory + filename + ".png";
 					cout << "path: " << path << endl;
 					load_image = imread(path, 1);
 
@@ -97,6 +97,18 @@ int main() {
 				}
 			}
 
+			//Check that images were read correctly
+			cout << "Images read: " << images.size() << endl;
+
+			int counter = 0;
+			for (Mat test_image : images) {
+				string window_name = format("test_image_%d", counter);
+				namedWindow(window_name, CV_WINDOW_AUTOSIZE);
+				imshow(window_name, test_image);
+				cout << "showing image " << counter << endl;
+				counter++;
+			}
+
 			//Convert to grayscale
 			picture_grayscale = picture.clone();
 			cvtColor(picture, picture_grayscale, CV_BGR2GRAY);