reviloera / learnopencv

Learn OpenCV : C++ and Python Examples

LearnOpenCV

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

Want to become an expert in AI? AI Courses by OpenCV is a great place to start.

List of Blog Posts

Blog Post
Super Resolution in OpenCV
Improving Illumination in Night Time Images	Code
Video Classification and Human Activity Recognition	Code
How to use OpenCV DNN Module with Nvidia GPU on Windows	Code
How to use OpenCV DNN Module with NVIDIA GPUs	Code
Code OpenCV in Visual Studio
Install OpenCV on Windows – C++ / Python	Code
Face Recognition with ArcFace	Code
Background Subtraction with OpenCV and BGS Libraries	Code
RAFT: Optical Flow estimation using Deep Learning	Code
Making A Low-Cost Stereo Camera Using OpenCV	Code
Optical Flow in OpenCV (C++/Python)	Code
Introduction to Epipolar Geometry and Stereo Vision	Code
Classification With Localization: Convert any keras Classifier to a Detector	Code
Photoshop Filters in OpenCV	Code
Tetris Game using OpenCV Python	Code
Image Classification with OpenCV for Android	Code
Image Classification with OpenCV Java	Code
PyTorch to Tensorflow Model Conversion	Code
Snake Game with OpenCV Python	Code
Stanford MRNet Challenge: Classifying Knee MRIs	Code
Experiment Logging with TensorBoard and wandb	Code
Understanding Lens Distortion	Code
Image Matting with state-of-the-art Method “F, B, Alpha Matting”	Code
Bag Of Tricks For Image Classification - Let's check if it is working or not	Code
Getting Started with OpenCV CUDA Module	Code
Training a Custom Object Detector with DLIB & Making Gesture Controlled Applications	Code
How To Run Inference Using TensorRT C++ API	Code
Using Facial Landmarks for Overlaying Faces with Medical Masks	Code
Tensorboard with PyTorch Lightning	Code
Otsu's Thresholding with OpenCV	Code
PyTorch-to-CoreML-model-conversion	Code
Playing Rock, Paper, Scissors with AI	Code
CNN Receptive Field Computation Using Backprop with TensorFlow	Code
CNN Fully Convolutional Image Classification with TensorFlow	Code
How to convert a model from PyTorch to TensorRT and speed up inference	Code
Efficient image loading	Code
Graph Convolutional Networks: Model Relations In Data	Code
Getting Started with Federated Learning with PyTorch and PySyft	Code
Creating a Virtual Pen & Eraser	Code
Getting Started with PyTorch Lightning	Code
Multi-Label Image Classification with PyTorch: Image Tagging	Code
Funny Mirrors Using OpenCV	code
t-SNE for ResNet feature visualization	Code
Multi-Label Image Classification with Pytorch	Code
CNN Receptive Field Computation Using Backprop	Code
CNN Receptive Field Computation Using Backprop with TensorFlow	Code
Augmented Reality using AruCo Markers in OpenCV(C++ and Python)	Code
Fully Convolutional Image Classification on Arbitrary Sized Image	Code
Camera Calibration using OpenCV	Code
Geometry of Image Formation
Ensuring Training Reproducibility in Pytorch
Gaze Tracking
Simple Background Estimation in Videos Using OpenCV	Code
Applications of Foreground-Background separation with Semantic Segmentation	Code
EfficientNet: Theory + Code	Code
PyTorch for Beginners: Mask R-CNN Instance Segmentation with PyTorch	Code
PyTorch for Beginners: Faster R-CNN Object Detection with PyTorch	Code
PyTorch for Beginners: Semantic Segmentation using torchvision	Code
PyTorch for Beginners: Comparison of pre-trained models for Image Classification	Code
PyTorch for Beginners: Basics	Code
PyTorch Model Inference using ONNX and Caffe2	Code
Image Classification Using Transfer Learning in PyTorch	Code
Hangman: Creating games in OpenCV	Code
Image Inpainting with OpenCV (C++/Python)	Code
Hough Transform with OpenCV (C++/Python)	Code
Xeus-Cling: Run C++ code in Jupyter Notebook	Code
Gender & Age Classification using OpenCV Deep Learning ( C++/Python )	Code
Invisibility Cloak using Color Detection and Segmentation with OpenCV	Code
Fast Image Downloader for Open Images V4 (Python)	Code
Deep Learning based Text Detection Using OpenCV (C++/Python)	Code
Video Stabilization Using Point Feature Matching in OpenCV	Code
Training YOLOv3 : Deep Learning based Custom Object Detector	Code
Using OpenVINO with OpenCV	Code
Duplicate Search on Quora Dataset	Code
Shape Matching using Hu Moments (C++/Python)	Code
Install OpenCV 4 on CentOS (C++ and Python)	Code
Install OpenCV 3.4.4 on CentOS (C++ and Python)	Code
Install OpenCV 3.4.4 on Red Hat (C++ and Python)	Code
Install OpenCV 4 on Red Hat (C++ and Python)	Code
Install OpenCV 4 on macOS (C++ and Python)	Code
Install OpenCV 3.4.4 on Raspberry Pi	Code
Install OpenCV 3.4.4 on macOS (C++ and Python)	Code
OpenCV QR Code Scanner (C++ and Python)	Code
Install OpenCV 3.4.4 on Windows (C++ and Python)	Code
Install OpenCV 3.4.4 on Ubuntu 16.04 (C++ and Python)	Code
Install OpenCV 3.4.4 on Ubuntu 18.04 (C++ and Python)	Code
Universal Sentence Encoder	Code
Install OpenCV 4 on Raspberry Pi	Code
Install OpenCV 4 on Windows (C++ and Python)	Code
Hand Keypoint Detection using Deep Learning and OpenCV	Code
Deep learning based Object Detection and Instance Segmentation using Mask R-CNN in OpenCV (Python / C++)	Code
Install OpenCV 4 on Ubuntu 18.04 (C++ and Python)	Code
Install OpenCV 4 on Ubuntu 16.04 (C++ and Python)	Code
Multi-Person Pose Estimation in OpenCV using OpenPose	Code
Heatmap for Logo Detection using OpenCV (Python)	Code
Deep Learning based Object Detection using YOLOv3 with OpenCV ( Python / C++ )	Code
Convex Hull using OpenCV in Python and C++	Code
MultiTracker : Multiple Object Tracking using OpenCV (C++/Python)	Code
Convolutional Neural Network based Image Colorization using OpenCV	Code
SVM using scikit-learn	Code
GOTURN: Deep Learning based Object Tracking	Code
Find the Center of a Blob (Centroid) using OpenCV (C++/Python)	Code
Support Vector Machines (SVM)	Code
Batch Normalization in Deep Networks	Code
Deep Learning based Character Classification using Synthetic Dataset	Code
Image Quality Assessment : BRISQUE	Code
Understanding AlexNet
Deep Learning based Text Recognition (OCR) using Tesseract and OpenCV	Code
Deep Learning based Human Pose Estimation using OpenCV ( C++ / Python )	Code
Number of Parameters and Tensor Sizes in a Convolutional Neural Network (CNN)
How to convert your OpenCV C++ code into a Python module	Code
CV4Faces : Best Project Award 2018
Facemark : Facial Landmark Detection using OpenCV	Code
Image Alignment (Feature Based) using OpenCV (C++/Python)	Code
Barcode and QR code Scanner using ZBar and OpenCV	Code
Keras Tutorial : Fine-tuning using pre-trained models	Code
OpenCV Transparent API
Face Reconstruction using EigenFaces (C++/Python)	Code
Eigenface using OpenCV (C++/Python)	Code
Principal Component Analysis
Keras Tutorial : Transfer Learning using pre-trained models	Code
Keras Tutorial : Using pre-trained Imagenet models	Code
Technical Aspects of a Digital SLR
Using Harry Potter interactive wand with OpenCV to create magic
Install OpenCV 3 and Dlib on Windows ( Python only )
Image Classification using Convolutional Neural Networks in Keras	Code
Understanding Autoencoders using Tensorflow (Python)	Code
Best Project Award : Computer Vision for Faces
Understanding Activation Functions in Deep Learning
Image Classification using Feedforward Neural Network in Keras	Code
Exposure Fusion using OpenCV (C++/Python)	Code
Understanding Feedforward Neural Networks
High Dynamic Range (HDR) Imaging using OpenCV (C++/Python)	Code
Deep learning using Keras – The Basics	Code
Selective Search for Object Detection (C++ / Python)	Code
Installing Deep Learning Frameworks on Ubuntu with CUDA support
Parallel Pixel Access in OpenCV using forEach	Code
cvui: A GUI lib built on top of OpenCV drawing primitives	Code
Install Dlib on Windows
Install Dlib on Ubuntu
Install OpenCV3 on Ubuntu
Read, Write and Display a video using OpenCV ( C++/ Python )	Code
Install Dlib on MacOS
Install OpenCV 3 on MacOS
Install OpenCV 3 on Windows
Get OpenCV Build Information ( getBuildInformation )
Color spaces in OpenCV (C++ / Python)	Code
Neural Networks : A 30,000 Feet View for Beginners
Alpha Blending using OpenCV (C++ / Python)	Code
User stories : How readers of this blog are applying their knowledge to build applications
How to select a bounding box ( ROI ) in OpenCV (C++/Python) ?
Automatic Red Eye Remover using OpenCV (C++ / Python)	Code
Bias-Variance Tradeoff in Machine Learning
Embedded Computer Vision: Which device should you choose?
Object Tracking using OpenCV (C++/Python)	Code
Handwritten Digits Classification : An OpenCV ( C++ / Python ) Tutorial	Code
Training a better Haar and LBP cascade based Eye Detector using OpenCV
Deep Learning Book Gift Recipients
Minified OpenCV Haar and LBP Cascades	Code
Deep Learning Book Gift
Histogram of Oriented Gradients
Image Recognition and Object Detection : Part 1
Head Pose Estimation using OpenCV and Dlib	Code
Live CV : A Computer Vision Coding Application
Approximate Focal Length for Webcams and Cell Phone Cameras
Configuring Qt for OpenCV on OSX	Code
Rotation Matrix To Euler Angles	Code
Speeding up Dlib’s Facial Landmark Detector
Warp one triangle to another using OpenCV ( C++ / Python )	Code
Average Face : OpenCV ( C++ / Python ) Tutorial	Code
Face Swap using OpenCV ( C++ / Python )	Code
Face Morph Using OpenCV — C++ / Python	Code
Deep Learning Example using NVIDIA DIGITS 3 on EC2
NVIDIA DIGITS 3 on EC2
Homography Examples using OpenCV ( Python / C ++ )	Code
Filling holes in an image using OpenCV ( Python / C++ )	Code
How to find frame rate or frames per second (fps) in OpenCV ( Python / C++ ) ?	Code
Delaunay Triangulation and Voronoi Diagram using OpenCV ( C++ / Python)	Code
OpenCV (C++ vs Python) vs MATLAB for Computer Vision
Facial Landmark Detection
Why does OpenCV use BGR color format ?
Computer Vision for Predicting Facial Attractiveness	Code
applyColorMap for pseudocoloring in OpenCV ( C++ / Python )	Code
Image Alignment (ECC) in OpenCV ( C++ / Python )	Code
How to find OpenCV version in Python and C++ ?
Baidu banned from ILSVRC 2015
OpenCV Transparent API
How Computer Vision Solved the Greatest Soccer Mystery of All Time
Embedded Vision Summit 2015
Read an Image in OpenCV ( Python, C++ )	Code
Non-Photorealistic Rendering using OpenCV ( Python, C++ )	Code
Seamless Cloning using OpenCV ( Python , C++ )	Code
OpenCV Threshold ( Python , C++ )	Code
Blob Detection Using OpenCV ( Python, C++ )	Code
Turn your OpenCV Code into a Web API in under 10 minutes — Part 1
How to compile OpenCV sample Code ?
Install OpenCV 3 on Yosemite ( OSX 10.10.x )