spmallick/learnopencv

LearnOpenCV

This repository contains code for Computer Vision, Deep learning, and AI research articles shared on our blog LearnOpenCV.com.

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List of Blog Posts

| Blog Post | Code| | ------------- |:-------------| | Train RF-DETR for Instance Segmentation with GPT-6 Astra | | | How 10x AI Engineers Train Models for Production: Lessons from PINTO's Face Alignment Project | | | SAM-3: What’s New, How It Works, and Why It Matters [Updated] | Code | | VGGT vs. VGGT-Ω (VGGT-Omega): A Complete Guide to Feed-Forward 3D Reconstruction | Code | | MiniCPM-o 4.5: A 9B Model That Can See, Hear, and Speak at the Same Time | Code | | Object Tracking using OpenCV (C++/Python) [Updated] | Code | | Object Detection with OpenCV 5 in C++: YOLO26 Pose and Segmentation [Updated] | Code | | Read, Write and Display a Video using OpenCV [Updated] | Code | | Histogram of Oriented Gradients Explained Using OpenCV [Updated] | Code | | Edge Detection Using OpenCV [Updated] | Code | | Read, Display and Write an Image Using OpenCV [Updated] | Code | | Cropping an Image Using OpenCV [Updated] | Code | | Image Resizing with OpenCV [Updated] | Code | | Filling Holes in an Image Using OpenCV (Python/C++) [Updated] | Code | | Barcode and QR Code Scanner Using OpenCV [Updated] | Code | | OCR Text Recognition Using Tesseract and OpenCV [Updated] | Code | | Color Spaces in OpenCV (C++ and Python) [Updated] | Code | | Human Pose Estimation with OpenCV (C++ and Python) [Updated] | Code | | Face Detection with OpenCV and Dlib (C++ and Python) [Updated] | Code | | Rotation Matrix to Euler Angles [Updated] | Code | | Hough Transform with OpenCV (C++ and Python) [Updated] | Code | | Otsu's Thresholding with OpenCV [Updated] | Code | | Stereo Camera Depth Estimation with OpenCV (Python and C++) [Updated] | Code | | Understanding Lens Distortion [Updated] | Code | | Blob Detection Using OpenCV (Python, C++) [Updated] | Code | | Homography Examples Using OpenCV (Python and C++) [Updated] | Code | | Convex Hull Using OpenCV in Python and C++ [Updated] | Code | | Hu Moments for Shape Matching with OpenCV (Python and C++) [Updated] | Code | | BRISQUE Image Quality Assessment with OpenCV [Updated] | Code | | Super Resolution in OpenCV [Updated] | Code | | Augmented Reality Using ArUco Markers in OpenCV [Updated] | Code | | Head Pose Estimation with OpenCV [Updated] | Code | | Average Face with OpenCV: C++ and Python Tutorial [Updated] | Code | | Image Alignment with ECC in OpenCV: C++ and Python [Updated] | Code | | Monocular SLAM in Python with OpenCV [Updated] | Code | | OpenCV QR Code Scanner in C++ and Python [Updated] | Code | | Optical Flow in OpenCV: Sparse and Dense Methods [Updated] | Code | | CNN-Based Image Colorization with OpenCV DNN [Updated] | Code | | Snake Game with OpenCV and Python [Updated] | Code | |Delaunay Triangulation and Voronoi Diagram using OpenCV ( C++ / Python) [Updated] | Code | | Contour Detection using OpenCV (Python/C++) [Updated] | Code | | Feature Based Image Alignment using OpenCV (C++/Python) [Updated] | Code | | Video Stabilization Using Point Feature Matching in OpenCV [Updated] | Code | |Camera Calibration using OpenCV [Updated] |Code| |Find the Center of a Blob (Centroid) using OpenCV (C++/Python) [Updated] | Code| | How to find frame rate or frames per second (fps) in OpenCV ( Python / C++ ) ? [Updated] | Code | | Install OpenCV 5 on Linux | Code | | Decoding Virat Kohli's Flick Shot: AI-Based 3D Motion Reconstruction | Code | | How to Run Object Detection with OpenCV 5 | | | World Cup 2026 Offside Technology: AI, Computer Vision, and the Connected Ball | | | AI Aced JEE Advanced 2026. Can You Trust It to Teach You? | | | How to Fine-Tune YOLO26 for Safety Gear and Sign Language Detection | Code | | How to Unlock 5 Vision Skills with the Moondream Cloud API | Code | | JEE Advanced 2026: We Tested AI on the Toughest Exam | | | How to Master Qwen3-VL Embedding and Reranker for Multimodal Search | Code | | How to Master YOLOE: Real-Time Open-Vocabulary Detection Made Easy | Code | | Vision Banana: How Image Generators Are Becoming Powerful Vision Models | | | YOLO26 Keypoint Estimation: Real-Time Pose Estimation with Ultralytics | Code | | RF-DETR Segmentation: Real-Time Detection & Instance Segmentation Guide | Code | | YOLO26 Instance Segmentation: Pixel-Perfect AI at Real-Time Speed | Code | | Multi-Object Tracking with Roboflow Trackers and OpenCV | Code | | Real-Time Face Blur and Pixelation with OpenCV YuNet | Code | | Breaking the Bottleneck: Achieving Native NMS-Free Inference with YOLO26 | Code | | YOLOv26: An Object Detector Built for Real-Time Deployment | Code | | Beyond Transformers: A Deep Dive into HOPE | | | Serving SGLang: Launch a Production-Style Server | | |Deployment on Edge: LLM Serving on Jetson using vLLM|Code| |Nested Learning: Is Deep Learning Architecture an Illusion?|| | How to Build a GitHub Code-Analyser Agent for Developer Productivity | Code | | The Existential Problems in LLM Serving | | | SAM 3D: Foundation Model for Single-Image 3D Reconstruction | | | Image-GS: Adaptive Image Reconstruction using 2D Gaussians | Code | | Ultimate Guide to Vector Databases and RAG Pipeline | Code | |What Makes DeepSeek OCR So Powerful|Code| | 2D Gaussian Splatting: Geometrically Accurate Radiance Field Reconstruction | Code | | TRM: Tiny Recursive Models | Code | |Deploying ML Models on Arduino: From Blink to Think|Code| | VideoRAG: Redefining Long-Context Video Comprehension | | | AI Agent in Action: Automating Desktop Tasks with VLMs | Code | | Top VLM Evaluation Metrics for Optimal Performance Analysis | Code | |Getting Started with VLM on Jetson Nano|Code| | VLM on Edge: Worth the Hype or Just a Novelty? | Code | | AnomalyCLIP : Harnessing CLIP for Weakly-Supervised Video Anomaly Recognition | Code | | AI_for_Video_Understanding_From_Content_Moderation_to_Summarization | Code | | Video-RAG: Training-Free Retrieval for Long-Video LVLMs | Code | | Object Detection and Spatial Understanding with VLMs ft. Qwen2.5-VL | Code | | LangGraph: Building Self-Correcting RAG Agent for Code Generation | Code | | Inside Sinusoidal Position Embeddings: A Sense of Order | Code | | Inside RoPE: Rotary Magic into Position Embeddings | Code | | SimLingo-Vision-Language-Action-Model-for-Autonomous-Driving | Code | | FineTuning Gemma 3n for Medical VQA on ROCOv2 | Code | | SmolLM3 Blueprint: SOTA 3B-Parameter LLM | | | LangGraph-A-Visual-Automation-and-Summarization-Pipeline | Code | | Fine-Tuning AnomalyCLIP: Class-Agnostic Zero-Shot Anomaly Detection | Code | | SigLIP 2: DeepMind’s Multilingual Vision-Language Model | | | MedGemma: Google’s Medico VLM for Clinical QA, Imaging, and More | Code | | Nanonets-OCR-s: Enabling Rich, Structured Markdown for Document Understanding | | | Optimizing VJEPA-2: Tackling Latency & Context in Real-Time Video Classification Scripts | Code | | V-JEPA 2: Meta’s Breakthrough in AI for the Physical World | Code | | NVIDIA Cosmos Reason1: Video Understanding | Code | | GR00T N1.5 Explained | | | LLaVA | Code | | SmolVLA: Affordable & Efficient VLA Robotics on Consumer GPUs | Code | | Fine-Tuning Grounding DINO: Open-Vocabulary Object Detection | Code | | Getting Started with Qwen3 – The Thinking Expert | Code | | Inside the GPU: A Comprehensive Guide to Modern Graphics Architecture | | | Distributed Parallel Training: PyTorch | Code | | MONAI: The Definitive Framework for Medical Imaging Powered by PyTorch | | | SANA-Sprint: The One-Step Revolution in High-Quality AI Image Synthesis | | | FramePack-Video-Diffusion-but-feels-like-Image-Diffusion | Code | | Model Weights File Formats in Machine Learning | | | Unsloth: A Guide from Basics to Fine-Tuning Vision Models | [Code](https: