AttributeError: module 'cv2' has no attribute 'ximgproc'

[nicolaslesquoy]

Expected behaviour

I didn't expect this error. I checked various forums about this issue, like StackOverflow or this GitHub repo and it seems to be caused by conflicting installation of opencv but I checked and I have only one version of the package installed (opencv-python)

Actual behavior

I receive the following error :

Traceback (most recent call last):
  File "[...]/pattern.py", line 7, in <module>
    ss = cv2.ximgproc.segmentation.createSelectiveSearchSegmentation()
AttributeError: module 'cv2' has no attribute 'ximgproc'

Steps to reproduce

• Run the following file

import cv2

img = cv2.imread("image.jpg")

# Create a Selective Search object
ss = cv2.ximgproc.segmentation.createSelectiveSearchSegmentation()

# Set the input image
ss.setBaseImage(img)

# Run the selective search algorithm
ss.switchToSelectiveSearchFast()
rects = ss.process()

# Show the results
for i, rect in enumerate(rects):
    x, y, w, h = rect
    cv2.rectangle(img, (x, y), (x+w, y+h), (0, 255, 0), 2)

cv2.imshow("Selective Search", img)
cv2.waitKey(0)

• operating system & architecture : I use Ubuntu 22.04 (x86-64)
• opencv-python version : opencv_python-4.7.0.72 with Python 3.10.6

I used to following methods to try to mitigate this issue:

• I uninstalled opencv-python and checked that it was not installed anymore.
• I purged the download cache of pip
• I installed opencv-python with pip.

Issue submission checklist

• This is not a generic OpenCV usage question (looking for help for coding, other usage questions, homework etc.)

• I have read the README of this repository and understand that this repository provides only an automated build toolchain for OpenCV Python packages (there is no actual OpenCV code here)

• The issue is related to the build scripts in this repository, to the pre-built binaries or is a feature request (such as "please enable this additional dependency")

• I'm using the latest version of opencv-python

[nicolaslesquoy]

So apparently the issue was that the module I needed was in opencv-contrib-python. So I will close this issue.