Saving detected facial landmarks into a file - c++

Question

I'm trying to import facial landmark points from webcam or video
using dlib into a file . I can display all detected landmarks on the terminal
but it is only saving the first and second landmark ponits (x,y) into the
output file , and not saving all the detected landmarks into
the output file
#include <dlib/opencv.h>
#include <opencv2/highgui/highgui.hpp>
#include <dlib/image_processing/frontal_face_detector.h>
#include <dlib/image_processing/render_face_detections.h>
#include <dlib/image_processing.h>
#include <dlib/gui_widgets.h>
using namespace dlib;
using namespace std;
int main()
{
try
{
cv::VideoCapture cap(0);
if (!cap.isOpened())
{
cerr << "Unable to connect to camera" << endl;
return 1;
}
image_window win;
frontal_face_detector detector = get_frontal_face_detector();
shape_predictor pose_model;
deserialize("shape_predictor_68_face_landmarks.dat") >> pose_model;
while(!win.is_closed())
{
// Grab a frame
cv::Mat temp;
cap >> temp;
cv_image<bgr_pixel> cimg(temp);
std::vector<rectangle> faces = detector(cimg);
std::vector<full_object_detection> shapes;
for (unsigned long i = 0; i < faces.size(); ++i)
{
full_object_detection shape = pose_model(cimg, faces[i]);
cout << "number of parts: "<< shape.num_parts() << endl;
cout << "pixel position of first part: " << shape.part(0) << endl;
cout << "pixel position of second part: " << shape.part(1) << endl;
shapes.push_back(pose_model(cimg, faces[i]));
const full_object_detection& d = shapes[0];
ofstream outputfile;
outputfile.open("data1.txt");
outputfile<< shape.part(0).x() << " " << shape.part(0).y() << endl;
outputfile<< shape.part(1).x() << " " << shape.part(1).y() << endl;
}
win.clear_overlay();
win.set_image(cimg);
win.add_overlay(render_face_detections(shapes));
}
}
catch(serialization_error& e)
{
cout << "You need dlib's default face landmarking model file to run this example." << endl;
cout << "You can get it from the following URL: " << endl;
cout << " http://dlib.net/files/shape_predictor_68_face_landmarks.dat.bz2" << endl;
cout << endl << e.what() << endl;
}
catch(exception& e)
{
cout << e.what() << endl;
}
}

Answer 1

Am I wrong or you want to save all landmarks when you have only:
ofstream outputfile;
outputfile.open("data1.txt");
outputfile<< shape.part(0).x() << " " << shape.part(0).y() << endl;
outputfile<< shape.part(1).x() << " " << shape.part(1).y() << endl;
And even not closing the file correctly. Try with for statement.