Even though this is the version of my project that I will submit for the Masters, this is by no means the final version of my project’s application. For the submission to the BBC, I will do some more changes and optimisations. I’ll discuss this in details in the “Further Development” section.



All videos of my prototypes can be found at my vimeo page here.


Below are the source files of prototype 03 written in pseudo code for easier understanding.


main.cpp 

include stuff



// Main

//--------------------------------------------------------------

open window of size 720,576

run main c++ file (testApp.cpp)


testApp.h 

Include addons like ofxOpenCv, ofxVectorMath, ofxBox2d, ofxContourUtil and ofxBlobTracker



name the blob tracker for the history of contours and blobs

name the physics world

name the happy face circle



name video grabber for the webcam or video player for movie



name colour images to store the video pixels in

name grayscale images to store the foreground and background pixels in



name contour finders to store the contours in



name variables for blur, threshold and video sizes


testApp.cpp 

// Setup
//--------------------------------------------------------------
Make background black



Setup the physics world



Create happy face 



Set dimensions of video

Set dimensions of video on which operations are performed



Set the blob tracker to work within our physics world so blobs and the happy face can interact



Setup video (or live feed)



Allocate memory for video and operations video (which is going to be smaller than the original

 to improve performance)



Setup Gaussian mixture model and allocate memory for its drawing



Initialise blur and threshold



// Update

//--------------------------------------------------------------

For each new frame of the video (or live feed) we do:



Print frames per second, blur and threshold values into the window title bar



Scale video to our operations size

Update gaussian mixture model to learn background and save it in our foreground video

We apply our blur and threshold to the foreground video



Generate contours

We track the generated blobs



Draw

//--------------------------------------------------------------

Draw original video in original size



Draw blob history:

Draw the filled contour from 20 frames ago in half transparent white

Draw the outline of the last 20 frames’ contours. Adjust transparency slightly to let the final

 contour appear the clearest and the earliest almost invisible.



Add the current contour of each blob to a linestrip in the physics world



Draw our happy face with a random colour in each frame



Happy Face Draw

//--------------------------------------------------------------

Draw the main filled circle of the face

Draw the outline of the face

Draw the filled white circles for the right and left eye

Draw the black outline of the eyes

Draw the pupils