Funvision opencv C++ tutorials

OpenCV image and video I/O looks simple—until imread returns an empty cv::Mat or VideoWriter silently creates a 0-byte file. This practical C++ guide shows the chec…

When OpenCV 5 was finally released in June 2026, I couldn't wait to try it. It’s almost habit with new release. I have been building Opencv 2, 3, 4.x for years,…

Mastering OpenCV: Image Transformations (Resize, Crop, ROI & Filters) After I finally understood cv::Mat and memory behavior, the next step that changed everyth…

When I first started working with OpenCV in C++, I thought loading and displaying images would be trivial. I was not thinking about memory, unnecessary copy of Mat…

Have you ever spent hours debugging a stuttering 4K stream, only to realize that OpenCV’s cv::VideoCapture was not the best performing option? I’ve been there. For …