OpenCV 5 Image & Video I/O: imread, VideoCapture, VideoWriter
Learn OpenCV 5 image and video I/O in C++ with imread, imwrite, VideoCapture and VideoWriter—including silent-failure checks and complete code.
Tutorials
113 OpenCV and C++ tutorials, newest first. Every one of them has working source code.
- Install & build
- Streaming
- GStreamer
- FFmpeg
- Detection
- Faces
- Tracking
- Deep learning
- Multimodal AI
- Image processing
- Basics
- C++
- Python
- CUDA & GPU
- Performance
- Deployment
- Security
- Field notes
How to Install OpenCV 5 on Windows and Linux (CMake + MSVC)
Install OpenCV 5 on Windows or Linux using binaries or a CMake source build with MSVC, contrib modules, C++17 and a simple verification program.
OpenCV Image Transformations in C++: Resize, Crop, ROI, Filters
Learn OpenCV image transformations in C++: resize, crop, ROI, blur, Gaussian filtering and Canny—plus when shared cv::Mat data requires clone().
OpenCV cv::Mat Memory: Shallow Copy, clone and copyTo
Understand cv::Mat memory in C++: headers, shared data, reference counting, shallow copies, clone(), copyTo(), pixel access and safe image I/O.
Why I Stopped Relying on OpenCV’s VideoCapture, And You Should Too
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…
FFmpeg 8.1 'Hoare': The End of PCIe Bottlenecks with Vulkan Compute
The Evolution of GPU-Resident Pipelines: A Look at FFmpeg 8.1 "Hoare" Have you ever spent hours waiting for a high-resolution video transcode to finish…
Secure Vertex AI: Restrict API Tokens by IP [Tutorial]
Many Generative AI APIs allow you to restrict an API key or token to specific IP addresses, like Vertex AI, Google AI studio.
C++ OpenCV Object Tracking: Tutorial + Source Code [2025]
single target tracker tutorial in under 60 lines of C++. i will use a "select-and-track" approach where you can simply draw a box and track object
Automated Document Understanding Intelligence Qwen 3.5 Series and competition (Deep research doc)
Automated Document Understanding OCR applications Intelligence Qwen 3.5 Series and competition Deep research doc
One-Pixel Attacks: Why Computer Vision Security Is More Fragile Than You Think
Have you ever stared at a “Spot the Difference” puzzle and felt like your brain was melting? Same.
Agentic OCR with Gemini 3 Flash: Next-Gen Extraction
Google has just announced a step forward in intelligent document processing with the introduction of Agentic Vision for Gemini 3 flash.
Build OpenCV + FFmpeg Faster with AI Agents [2026]
In this article, I will explore how to built OpenCV with FFmpeg support, and FFmpeg libraries on Windows using the Antigravity AI IDE agent for latest…
