OpenCV for Hackers

Face Detection with OpenCV in Images

How to detect faces in images using the appearance-based method and the Neural Networks?

Face Detection in Videos using OpenCV

How to detect faces in videos?

#000 How to access and edit pixel values in OpenCV with Python?

Learn what images and pixels are and how to access and manipulate them using OpenCV

#001 How to read a video and access a webcam with OpenCV in Python?

Learn how to load camera frames and video files and how to create some simple video animations

#002 How to draw basic shapes and write text on images with OpenCV in Python?

In this post we are going to explain how to draw basic and more advanced shapes, as well as how to write text on images

#003 How to resize, translate, flip and rotate an image with OpenCV?

In this post, we’ll cover basic image transformations like image resizing, image translation, image rotation and image flipping

#004 How to smooth and sharpen an image in OpenCV?

Learn how to blur and sharpen images and how to create instagram like filters

#005 Image Arithmetic and Logical operations in OpenCV with Python

Learn how to perform some elementary arithmetic operations on images like addition and subtraction

#006 Morphological transformations with OpenCV in Python

Learn how to combine dilation and erosion to create more advanced image operations

#007 Color quantization using K-means clustering

Learn how we can apply machine learning theory on the pixel intensity color with the K-means clustering algorithm

# 008 How to detect faces, eyes and smiles using Haar Cascade Classifiers

Learn the theory behind the Haar cascade classifiers, and learn how to use them to detect faces, eyes and smiles with OpenCV in Python

#009 How to detect facial landmarks using DLIB and OpenCV

Learn how to detect facial landmarks in an image using dlib and OpenCV

#010 How to align faces with OpenCV in Python

Face alignment is one important step that we need to master before we start to work on some more complicated image processing tasks

#011 How to detect eye blinking in videos using dlib and OpenCV in Python

Learn how to develop a computer vision application that is capable of detecting and counting eye blinks in videos

#012 Blending and Pasting Images Using OpenCV

A fun and interesting way to blend and paste images on top of each other

#013 Optical Flow Using Horn and Schunck Method

Learn how to estimate the motion of every pixel in a video sequence by using the Optical Flow method

#014 Calculating Sparse Optical flow using Lucas Kanade method

Learn to detect moving objects in a video using the Lucas Kanade method

#015 Template matching using OpenCV in Python

Learn to identify the parts of an image that match a predefined template

#016 Feature Matching methods comparison in OpenCV

Learn to match distinctive features in images by using Brute-force and FLANN based feature matching methods