Merge branch 'take-a-picture-from-a-webcam' into 'master'

Added ability to take a picture from a webcam

Right now I just have a main method in FacialRec that is doing this.

Current functionality:
* When run, starts a video feed from the webcam
* If user presses spacebar, takes a picture and displays it
  * If user presses ESC or spacebar, return to video feed
* If user presses ESC, exit application

We might want to divide some of this into classes. Let me know what you think.

See merge request !1

CMakeLists.txt

+cmake_minimum_required(VERSION 2.8)
+project(FaceRecognition)
+find_package(OpenCV)
+include_directories(${OpenCV_INCLUDE_DIRS})
+add_executable(FaceRecognition FacialRec.cpp)
+target_link_libraries(FaceRecognition ${OpenCV_LIBS})

FacialRec.cpp

 //This is our project
 //Change made by Jon
 
+#include <iostream>
+
+#include "opencv2/imgproc/imgproc.hpp"
+#include "opencv2/highgui/highgui.hpp"
+
+using namespace std;
+using namespace cv;
+
+Mat picture;
+char key;
+
 class FacialRec {
 
+};
+
+int main() {
+	//Starting the video
+	VideoCapture videoCapture(0);
+
+	if (!videoCapture.isOpened()) {
+		cout << "Unable to open video file." << endl;
+		return 1;
+	}
+
+	namedWindow("Webcam", CV_WINDOW_AUTOSIZE);
+
+	while(true) {
+		Mat frame;
+		videoCapture.retrieve(frame);
+		bool success = videoCapture.read(frame);
+		if (!success) {
+			cout << "Could not read from video file" << endl;
+			return 1;
+		}
+
+		imshow("Webcam", frame);
+		key = waitKey(30);
+
+		if (key == 27) { //escape key pressed: stop program
+			cout << "ESC pressed. Program closing..." << endl;
+			break;
+		} else if (key == ' ') { //spacebar pressed: take a picture
+			picture = frame;
+			key = -1;
+
+			while (true) {
+				imshow("Webcam", picture);
+				
+				key = waitKey(30);
+				
+				if (key == 27 || key == 32) {
+					cout << "ESC or SPACE pressed. Returning to video..." << endl;
+					break;
+				}
+			}
+		}
+
+	}
+	
+	return 0;
 }

README.txt

+Current functionality:
+-When run, starts a video feed from the webcam
+-If user presses spacebar, takes a picture and displays it
+--If user presses ESC or spacebar, return to video feed
+-If user presses ESC, exit application
+
+Compiling the project from command line:
+
+(FOR MAC)
+
+>>cd <path/to/application/folder>
+>>/Applications/CMake.app/Contents/bin/cmake .
+>>make