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.
Can't open/read file: check file path/integrity - C++ - OpenCV
Jan 20, 2025 · Hello friends. The following program WORKED to read image files, but it stopped working and gave the following error: global loadsave.cpp:268 cv::findDecoder imread_ (''): can't open/read …
Download haarcascade_frontalface_default.xml - OpenCV Q&A Forum
Jul 26, 2020 · How do I do this from github? I'm using Windows/Pycharm
Opencv + CUDA + C++ - C++ - OpenCV
Jan 24, 2025 · I had difficulties building from the opencv + CUDA source code for c++. I do everything according to this guide. Build OpenCV (including Python) with CUDA on Windows: Comprehensive …
OpenCV 5 Roadmap? - opencv-50 - OpenCV
Jun 11, 2025 · OpenCV 5 is many years late. Here is a quote from one of their old announcements: “In 2020, OpenCV 5.0 is coming out with an emphasis on deep learning and better performance on …
Unable to compile CUDA Version - Python - OpenCV
Apr 25, 2025 · Hello guys. I’m during 3 days trying to make opencv to work with CUDA. I already have CUDA installed, cudnn etc. What happens: After making all process described in some youtube …
Error: OpenCV(4.11.0) error: (-5:Bad argument) in function 'imshow'
Apr 4, 2025 · I think there was an update to the input sent to opencv in version 4.11 and it especially affects Linux-based systems. The question is, how should we adjust the array inputs created with …
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 scratch then …
How to display multiple images in one window? - OpenCV Q&A Forum
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 aware of …
Eye-to-hand calibration - calib3d - OpenCV
Oct 17, 2021 · This function cv.calibrateHandEye describes an eye-in-calibration process where camera is attached to a robot arm. I want to do an eye-to-hand calibration where a camera is fixed on a …