preprocess/landmarks_detector.py

import dlib


class LandmarksDetector:
    def __init__(self, predictor_model_path):
        """
        :param predictor_model_path: path to shape_predictor_68_face_landmarks.dat file
        """
        self.detector = dlib.get_frontal_face_detector()  # cnn_face_detection_model_v1 also can be used
        self.shape_predictor = dlib.shape_predictor(predictor_model_path)

    def get_landmarks(self, img):
        # img = dlib.load_rgb_image(image) # load from path
        dets = self.detector(img, 1)

        all_faces = []
        for detection in dets:
            try:
                face_landmarks = [(item.x, item.y) for item in self.shape_predictor(img, detection).parts()]
                all_faces.append(face_landmarks)
            except:
                print("Exception in get_landmarks()!")
        return all_faces