AttributeError: 模块 'cv2.cv2' 没有属性 'bgsegm

Question

import numpy as np
import cv2
cap = cv2.VideoCapture('vtest.avi')
fgbg = cv2.bgsegm.createBackgroundSubtractorMOG()
while(1):
    ret, frame = cap.read()
    fgmask = fgbg.apply(frame)
    cv2.imshow('frame',fgmask)
    k = cv2.waitKey(30) & 0xff
    if k == 27:
        break
cap.release()
cv2.destroyAllWindows()

I am getting the following error: AttributeError: module 'cv2.cv2' has no attribute 'bgsegm'.

I am using Python 3.6 with OpenCV 3.6 on windows machine. I tried using the pip install opencv-contrib-python command but still the problem remains same on my windows machine. This command helped be on Ubuntu system, but not on windows. I searched similar problems on stack but couldn't solve this issue. Can someone help me out on this? Thanks!

Answer 1

您需要安装contrib依赖项才能使其正常工作，因为它不是标准构建的一部分。

pip install opencv-contrib-python

Answer 2

Installing contrib dependencies will fix your problem:

pip install opencv-contrib-python

Alternatively, you can use the newer createBackgroundSubtractorMOG2() , which is directly available in cv2:

fgbg = cv2.createBackgroundSubtractorMOG2()

Answer 3

If you are using python3, write:

fgbg =cv2.createBackgroundSubtractorMOG2() #For python3

And not:

fgbg = cv2.bgsegm.createBackgroundSubtractorMOG()

Answer 4

Most probably this issue arises when someone tries to install multiple packages of OpenCV or even tries to install multiple packages of OpenCV in a different order.

If you read the official opencv-contrib-python installation docs there is written that you only need to install one package of OpenCV.

For example, if you need a base OpenCV module with extra contrib modules, you just need to install opencv-contrib-python with the appropriate version you want:

$ pip install opencv-contrib-python

And this will install both OpenCV and OpenCV contrib modules.

The reason for that is all the OpenCV modules use the same namespace which is cv2 and do not use the plugin architecture. So, when you install the other module, it will rewrite the existing namespace with a new module library that is being installed.

Answer 5

我用的是 3.4.2.16 版本的 OpencV，你可以试试这个版本的 OpencV

Answer 6

Write

fgbg = cv2.createBackgroundSubtractorMOG()

instead of

fgbg = cv2.bgsegm.createBackgroundSubtractorMOG()

you need not use bgsegm.