OpenCV

Topic	Replies	Views	Activity
Useful Links (Read First!) Before asking a question in the forum, check out some of these resources and see if you can find a common answer. Documentation Tutorials Super Helpful Wiki Bugs and Issues Here are some additional useful links. Of…	0	25269	February 26, 2021
Welcome to OpenCV Forum!	33	17240	February 10, 2024
Build OpenCV 5 with CMake failed build	3	62	July 1, 2026
Wide-baseline stereo on circles grid, enormous stereo RMS calib3d , calib	11	67	June 26, 2026
Microsoft made std::mutex constexpr in the STL for VS17.10 and later windows , build	1	18	June 24, 2026
Asymmetric Circle Grid Calibration Python calib3d	7	2702	June 7, 2025
This implementation keps failing silently, but the repo readme says it works fine. The controller for my robot keeps crashing when this function is triggered Python programming	1	19	June 19, 2026
Calculation of pipe dimensions, pipe geometry segmentation	1	55	June 17, 2026
ArUco detection on macOS (AVFoundation → OpenCV 4) intermittently returns no markers — sanity check on params/pipeline? aruco	4	40	June 17, 2026
Real-Time Detection of Vertical Tongue Movements via Mobile Camera — Choosing the Right Approach Python	1	46	June 17, 2026
Pip install opencv-python (still in old version) Python	1	58	June 17, 2026
Using OpenCV with Embarcadero Delphi 10.3.3 (Object Pascal) delphi , pascal	11	7197	June 12, 2026
Fine tuning image selctions Python ocr	1	41	June 9, 2026
cv::VideoCapture.read(frame) with CAP FFMPEG and hardware acceleration adds two black lines C++ videoio	0	41	June 8, 2026
Laser pattern rangefinding using a diffraction grating Python calib3d , raspberrypi	10	141	June 7, 2026
OpenCV Raspicam Ubuntu 24 Server Python raspberrypi , video-streaming	2	52	June 5, 2026
Can't Read YUV HDMI IN with VideoCapture Python videoio	5	69	June 2, 2026
AR rock climbing wall Python	3	99	May 30, 2026
Matchtemplate SQDIFF has minValue != 0 for identical image/template imgproc	4	44	May 29, 2026
Introducing PureCV: A Pure Rust Port of OpenCV Projects rust	4	463	May 29, 2026
Stereo Calibration: Very high radial distortion coefficients calib3d	3	46	May 26, 2026
Why doesn't OpenCV officially compile the OpenVINO version anymore?	0	34	May 25, 2026
cv::VideoCapture.isOpen() returns TRUE even on some errors (bug?) C++ videoio	1	56	May 19, 2026
Opencv camera calibration C++ calib3d	5	186	May 19, 2026
Can't read mp4 on alma linux ( = RHEL) system C++ videoio	4	59	May 19, 2026
Computer Vision Task programming	0	47	May 16, 2026
ArUco relative displacement measurement between markers - precision issues when object rotates C++ aruco	5	77	May 15, 2026
OpenCV with CUDA for C++ help C++ build , cuda	0	88	May 12, 2026
How to distinguish exterior wall outline lines from hatch, dimension, and view-crop lines in architectural elevation PDFs?	4	58	May 11, 2026
OpenCV 4.12.0 CMake Shows freetype2: NO / harfbuzz: NO (vcpkg, VS2022, Windows 11) C++ windows , build , freetype , vcpkg	1	252	May 9, 2026

Useful Links (Read First!)

Before asking a question in the forum, check out some of these resources and see if you can find a common answer. Documentation Tutorials Super Helpful Wiki Bugs and Issues Here are some additional useful links. Of…