Solving the Mystery Behind the AttributeError in OpenCV

Have you ever encountered the puzzling AttributeError: module 'cv2.cv2' has no attribute 'createLBPHFaceRecognizer' while working with OpenCV in Python? This error can be a stumbling block when you're diving into face recognition projects. But fear not! In this post, we'll demystify this error and guide you through a solution to keep your project moving forward.

Understanding the Error

First, let's understand what causes this error. OpenCV (Open Source Computer Vision Library) is a library of programming functions mainly aimed at real-time computer vision. It's a go-to for many developers working on image processing, video capture, and analysis, including face recognition tasks.

The createLBPHFaceRecognizer function is part of the face recognition features in OpenCV. However, as OpenCV evolves, its API changes, and some functions might be moved or renamed. This is precisely what happened with the createLBPHFaceRecognizer function, leading to the AttributeError.

The Solution

To resolve this issue, it's essential to know that OpenCV's face recognition functionalities were moved to a separate module named opencv_contrib. This module contains extra functionalities and algorithms that are not included in the main OpenCV package, including the face recognition features.

Here's a step-by-step guide to fix the error:

Step 1: Install opencv-contrib-python

Ensure you have the opencv-contrib-python package installed. This package includes both the main OpenCV module and the additional contributions, including the face recognition features. You can install it using pip:

pip install opencv-contrib-python

Make sure to uninstall the standard opencv-python package if it's already installed to avoid conflicts.

Step 2: Use the Correct Function Call

After installing the opencv-contrib-python package, you can access the face recognition features, including the LBPH (Local Binary Patterns Histograms) face recognizer. The function has been slightly renamed and should be accessed as follows:

import cv2

# Create an LBPH (Local Binary Patterns Histograms) Face Recognizer
face_recognizer = cv2.face.LBPHFaceRecognizer_create()

This code snippet demonstrates how to initialize the LBPH face recognizer correctly, avoiding the AttributeError.


The AttributeError: module 'cv2.cv2' has no attribute 'createLBPHFaceRecognizer' can be a frustrating hurdle when working on face recognition projects with OpenCV. However, by understanding the need to use the opencv-contrib-python package and accessing the face recognizer with the updated function call, you can easily overcome this issue.

Remember, as libraries and frameworks evolve, it's common to encounter changes in APIs and functionalities. Keeping an eye on the documentation and community updates can help you navigate these changes smoothly.

Happy coding, and may your face recognition projects be successful and error-free!