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().
Image processing
Core OpenCV image operations in C++: resize, crop and ROI, colour spaces, blurring and denoising, thresholds, edges, contours and drawing.
Mastering OpenCV cv::resize: Quality & Aspect Ratios
A comprehensive guide to scaling images, maintaining aspect ratios, and understanding interpolation.
OpenCV Face Mask Overlay: detectMultiScale Guide [2025]
This tutorial demonstrates how to use OpenCV and C++ to detect faces in an image and replace them with a mask.
OpenCV matchTemplate function tutorial to find matching template in source image
matchTemplate opencv C++ tutorial to find template image in large source image. Basic description with full source code included.
Opencv 4 C++ Tutorial simple Background Subtraction
Simple OpenCV tutorial for video background substraction to separate background and moving foreground in the video.
[Source Code] OpenCV Denoising & Blur Masterclass
Smooth or blur, gaussian blur, and noise-canceling, This tutorial will learn OpenCV blur, GaussianBlur, median blur functions in C++.
OpenCV Mouse Callbacks: Select ROI & Draw [Source Code]
This c++ Opencv tutorial shows you how to draw a rectangle by mouse over the object.
[Source Code] Kalman Filter for Video Head Tracking
Opencv Kalman filter example video head tracking Example of kalman filter in Opencv with head detection and tracking.
Draw Rectangles in OpenCV C++: Full Tutorial [Code]
Opencv rectangle drawing tutorial by example in C++. Simple steps let you draw the rectangle inside the pictures and video sample.
Denoising opencv image in C++, Video is the same. Image in the loop.
The Opencv library has build-in a powerful denoising algorithm based on non-local means.
Stabilize & Denoise Slow-Mo Video [OpenCV Code]
FastMeansDenoisingColoredMulti VS just DenoisingColored in Opencv with image stabilization video example C++ tutorial and code is here
Opencv video and image noise reduction. Smart denoising of Iphone SE slow motion video.
Smart noise reduction (denoise) Iphone SE video C++ tutorial and code is here I expect that i finish this tutorial until the end of this weak.
OpenCV RGB Color Mixer Tutorial with Trackbars [C++]
Opencv C++ simple tutorial about the colors and color channels. There are a couple of tricks you can play with in Opencv.
Hough Lines & Canny Edge Detection in OpenCV [Code]
HoughLines, Canny edges, for OpenCV line detection edges detection in symple described C++ code, where all the steps are visualize and exmplayn.
Opencv tutorial, Combine two overlapping videos frames into one, MatchTemplate example
Combine two overlapping frame by simple correlation This tutorial use matchTemplate openv function to combine two images into one.
Aggregate channel features ACF Pedestrian Detector
Aggregate Channel Features for pedestrian detection: the ten LUV and gradient channels, how they are extracted with cv::Sobel, and the first results.
OpenCV C++ Sliding Window Object Detection [2025]
Opencv C++ tutorial about object detection with sliding window. A sliding window is easy to implement on a single scale and also not to much harder to…
OpenCV ROI Guide: Extract Regions of Interest [C++]
Simple opencv C++ tutorial on how to work with ROI. Code example about selecting the rectangle region of interest inside the image and cutting or…
Kalman Filter simple tracking example.
This is a simple tracking example of moving object. The basic concept is simple as following the steps Use background subtraction Code Here Draw a…
