OpenCV报错求助：cv2.face无createLBPHFaceRecognizer属性（Python3.6+OpenCV3.4）

Hey there, let's work through this error you're facing with OpenCV 3.4 and Python 3.6. I've dealt with this exact issue before, so here's what you need to do:

1. Correct the API Method Name #

First off, the method name changed between OpenCV 2.x and 3.x. In OpenCV 3.4, the LBPH face recognizer is created using cv2.face.LBPHFaceRecognizer_create() — not cv2.face.createLBPHFaceRecognizer() (that's the old 2.x syntax). Update your code to use the 3.x method and see if that resolves the error right away.

2. Ensure Matching Versions of OpenCV and opencv-contrib-python #

Even if you installed opencv-contrib-python, a version mismatch between the main opencv-python package and the contrib package can cause missing modules. Here's how to fix that:

• First, uninstall any existing OpenCV packages to start fresh:

  pip uninstall opencv-python opencv-contrib-python -y
  

• Then install the exact 3.4.x versions compatible with Python 3.6. The latest stable 3.4 release that works with Python 3.6 is 3.4.15.55:

  pip install opencv-python==3.4.15.55 opencv-contrib-python==3.4.15.55
  

3. Verify the Installation #

Run this quick test script to confirm everything is set up correctly:

import cv2

# Check OpenCV version
print(f"OpenCV version: {cv2.__version__}")

# Try creating the LBPH recognizer
try:
    recognizer = cv2.face.LBPHFaceRecognizer_create()
    print("Successfully created LBPHFaceRecognizer!")
except AttributeError as e:
    print(f"Error still occurs: {e}")

If the script prints the 3.4.15.55 version and the success message, you're good to go!

内容的提问来源于stack exchange，提问作者Anirudh