OpenCV - Ask OpenCV Questions, Get OpenCV Answers
Nov 3, 2025 · OpenCV (Open Source Computer Vision Library) is an open source computer vision and machine learning (AI) software library.
Download haarcascade_frontalface_default.xml - OpenCV Q&A …
Jul 26, 2020 · How do I do this from github? I'm using Windows/Pycharm
Build OpenCV with Cuda - C++ - OpenCV
Mar 7, 2025 · I am building an OpenCV library by Cmake with Cuda. My GPU and Cuda Toolkit are GTX1650 and v12.8, respectively. The command is following: cmake -G "Visual Studio 17 …
DLL load failed while importing cv2 - Python - OpenCV
Aug 29, 2023 · I may be wrong but it seems like you are mixing up two different installation methods. If you pip install you shouldn’t need to copy any dll’s accross. If you are building from …
Issue: Unable to Stream Webcam Properly in OpenCV
Dec 12, 2024 · Hi everyone, I’m trying to test if I can stream my camera feed in OpenCV. I have two cameras connected to my laptop: The built-in webcam. An external Logitech C270 …
Attribute Error: module 'cv2' has no attribute 'face' - OpenCV Q&A …
Oct 8, 2017 · The problem seems to be that python does not know to look for "face" attribute in the opencv_contrib-3.3.0 folder for some reason. Any suggestions would be very appreciated! …
OpenCV with CUDA support – unsupported visual studio version …
Mar 26, 2025 · Good morning, I am currently experiencing an issue building OpenCV with Cuda support. Following the process of using cmake to configure and generate I am building in …
OpenCV unable to recognize (any) checkerboard pattern
Apr 11, 2021 · We have been attempting to calibrate a DSLR camera for several weeks now, using literally every kind of calibration board, scene, lighting, and more. In every, single case, …
Cannot install Open-CV - Python - OpenCV
Mar 24, 2023 · Yes, I have tried updating pip. I used pip install --upgrade pip pip3 install --upgrade pip pip install --upgrade pip setuptools wheel pip3 install --upgrade pip setuptools wheel How …
How to display multiple images in one window? - OpenCV Q&A …
Since images are numpy arrays in OpenCV, we could use concatenate, vstack or hstack to help us achieve the task. The comments in the code should be self explanatory but one thing to be …