模块 'cv2.cv2' 没有属性 'face'

Question

In the following code, i am getting error at following step:

model = cv2.face.LBPHFaceRecognizer_create()

[

Error:

AttributeError: module 'cv2.cv2' has no attribute 'face'

Answer 1

The face module isn't actually a part of the opencv library proper. Rather, face is part of the opencv-contrib library. From the readme :

This repository [ opencv-contrib ] is intended for development of so-called "extra" modules, contributed functionality. New modules quite often do not have stable API, and they are not well-tested. Thus, they shouldn't be released as a part of official OpenCV distribution, since the library maintains binary compatibility, and tries to provide decent performance and stability.

opencv-contrib needs to be installed separately. As @james pointed out (in a now deleted comment), the current easy way to get the Python version is to just do:

pip install opencv-contrib-python

After you run the above pip call, your code should work.

Answer 2

Do this:

pip uninstall opencv_contrib_python

and install again:

pip install opencv_contrib_python