Make model read relative to __file__

pose_estimator.py

@@ -1,7 +1,7 @@
 """Estimate head pose according to the facial landmarks"""
 import cv2
 import numpy as np
-
+import os
 
 class PoseEstimator:
     """Estimate head pose according to the facial landmarks"""
@@ -19,7 +19,8 @@ class PoseEstimator:
             (150.0, -150.0, -125.0)      # Mouth right corner
         ]) / 4.5
 
-        self.model_points_68 = self._get_full_model_points()
+        default_model = os.path.join(os.path.dirname(__file__), 'assets/model.txt')
+        self.model_points_68 = self._get_full_model_points(default_model)
 
         # Camera internals
         self.focal_length = self.size[1]
@@ -39,7 +40,7 @@ class PoseEstimator:
         # self.r_vec = None
         # self.t_vec = None
 
-    def _get_full_model_points(self, filename='assets/model.txt'):
+    def _get_full_model_points(self, filename):
         """Get all 68 3D model points from file"""
         raw_value = []
         with open(filename) as file: