Mediapipe FACEMESH_IRISES坐标

Question

我正在使用mediapipe在静态图像中找到眼睛虹膜的坐标。我有下一个代码来做这个。在结束时，我运行print(''，face_landmarks)，并且有所有的坐标x，y，z。如果我运行print(''，mp_face_mesh.FACEMESH_IRISES)，我只有Iris点的索引，如next：

({(475,476)，(477,474)，(469,470)，(472,469)，(471,472)，(474,475)，(476,477)，(470,471)})

如何获得坐标而不是每个虹膜点的索引？

from multiprocessing import connection
import cv2
import mediapipe as mp
import sys
mp_drawing = mp.solutions.drawing_utils
mp_drawing_styles = mp.solutions.drawing_styles
mp_face_mesh = mp.solutions.face_mesh
IMAGE_FILES = [("pic1.jpg")]
drawing_spec = mp_drawing.DrawingSpec(thickness=1, circle_radius=1)
with mp_face_mesh.FaceMesh(
    static_image_mode=True,
    max_num_faces=1,
    refine_landmarks=True,
    min_detection_confidence=0.5) as face_mesh:
  for idx, file in enumerate(IMAGE_FILES):
    image = cv2.imread(file)
    results = face_mesh.process(cv2.cvtColor(image, cv2.COLOR_BGR2RGB))
    if not results.multi_face_landmarks:
      continue
    annotated_image = image.copy()
    for face_landmarks in results.multi_face_landmarks:
      mp_drawing.draw_landmarks(
          image=annotated_image,
          landmark_list=face_landmarks,   
          connections=mp_face_mesh.FACEMESH_IRISES,
          landmark_drawing_spec=None,
          connection_drawing_spec=mp_drawing_styles
          .get_default_face_mesh_iris_connections_style())
      mp_face_mesh

Answer 1

从0到467为人脸标志，468 ~ 477为虹膜标志。假设索引468和473是左、右虹膜中心点。你可以得到他们的3D坐标

(lm_left_iris.x, lm_left_iris.y, lm_left_iris.z) = face_landmarks.landmark[468]
(lm_right_iris.x, lm_right_iris.y, lm_right_iris.z) = face_landmarks.landmark[473]