How to fix ?

[sinyoung-park]

hi, i'm using colab. and the colab ,the colab is using python3.10.
i want use Grad-CAM. and i read the document the Grad-CAM and i modify code.

!pip install "grad-cam">=1.3.6
!python tools/visualization/vis_cam.py
/content/mmpretrain/pcldata/potentialcore230522/test_set/class_16slm/16slm_3002.png
/content/mmpretrain/configs/resnet/resnet34_8xb32_in1k_custom.py
/content/mmpretrain/resnet34_8xb32_in1k_custom/epoch_25.pth
--target-layers='backbone.layer3.4.relu'
--method='GradCAM'

but. the reuslt is Loads checkpoint by local backend from path: /content/mmpretrain/resnet34_8xb32_in1k_custom/epoch_25.pth
Automatically choose the last norm layer "backbone.layer4.2.bn2" as the target layer.
QObject::moveToThread: Current thread (0xf30eea0) is not the object's thread (0xc2a16e0).
Cannot move to target thread (0xf30eea0)

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/usr/local/lib/python3.10/dist-packages/cv2/qt/plugins" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: xcb.
and i found the /usr/local/lib/python3.10/dist-packages/cv2/qt/plugins path. but the libqxcb.sofile is not existed.
so i run this code.

import shutil
import os

cv2_path = os.path.dirname(cv2.file)
plugin_path = os.path.join(cv2_path, "qt", "plugins")
platform_path = os.path.join(plugin_path, "platforms")
os.makedirs(platform_path, exist_ok=True)
shutil.copy("/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so", platform_path)

and the result is /usr/local/lib/python3.10/dist-packages/cv2/qt/plugins/platforms/libqxcb.so .
so i think i solve this problem. but the code is still have same error. how can i do? please help me.

[Ezra-Yu]

Reinstalling the application may fix this problem

Have you tried to reinstall OpenCV?

[sinyoung-park]

yes. i reinstall the Open CV...i will try again..