The following two files are needed by the draw_delaunay_triangles executable:
face_landmark_detection
shape_predictor_68_face_landmarks.dat

The first file, "face_landmark_detection" is an executable program you will need to build for your architecture. Please download and build that program first. Then make a copy of the executable in
the same directory as "draw_delaunay_triangles". Also please copy "shape_predictor_68_face_landmarks.dat" to the same directory where "draw_delaunay_triangles" is located.

To build draw_delaunay_triangles.cpp, type "make" on the command line.

To run draw_delaunay_triangles, type the following:
./draw_delaunay_triangles rob_bruce.png

If all goes well, you will see a new output file called "mesh-rob_bruce.png".