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Introduction Recently, I was assigned a task to create a web automation script at work. This was my first attempt at writing such a script. While some basic operations were manageable using Selenium alone, automating slider captcha verification proved to be challenging. After combining Selenium with OpenCV, I was able to solve this problem succ ...

DoWhy Library for Causal Inference The DoWhy library provides a structured approach to causal inference, enabling researchers to estimate causal effects from observational data. Installation: pip install dowhy Basic usage example: import numpy as np import pandas as pd from dowhy import CausalModel import dowhy.datasets # Generate synthetic d ...

Understanding QR Codes Barcode systems encompass both one-dimensional and two-dimensional formats. The traditional linear barcodes found on retail products represent the one-dimensional variety, while QR codes constitute the two-dimensional category. The most prevalent QR code format is QR Code, which stands for Quick Response Code. Examining a ...

Problem Description During the OpenCV build process using CMake, the script attempts to download the Intel Integrated Performance Primitives (IPP) library file (e.g., ippicv_2019_lnx_intel64_general_20180723.tgz). Network restrictions often cause this download to fail, halting the configuration. Solution: Manual Download and Local Configuration ...

Overview The Ultralytcis ecosystem ships with a lightweight Annotator utility that can overlay detection masks, bounding boxes, oriented boxes, and keypoints on any image or video stream. The snippets below demonstrate typical use-cases. Interactive sweep counter on a video The following example tracks every object that crosses a user-draggable ...

Data Storage in OpenCV OpenCV provides flexible data storage through the InputArrayOfArrays interface, which can be implemented by various types: Mat, Mat_<T>, Mat_<T, m, n>, vector<T>, vector<vector<T>>, and vector<Mat>. Consider vector<vector<T>> as an example: the outer vector holds elements (i ...

This demonstration illustrates the implemantation of image restoration through inpainting algortihms using the OpenCV library. The application enables interactive masking of image regions follwoed by automated reconstruction of those areas using surrounding pixel data. The program workflow involves loading a source image, allowing users to draw ...

1. Prepare the C++ Development Environment with VSCode and MinGW-w64 Download MinGW-w64 from SourceForge. Add the bin folder (e.g., C:\Programs\mingw-w64\bin) to the system PATH. 2. Install CMake Get CMake from the official site. Add the bin directory (e.g., D:\tools\cmake-3.19.1-win64-x64\bin) to PATH. 3. Download OpenCV Sources Fetch the sour ...

Processing cryptic video sources requires a multi-stage pipeline to reveal hidden visual information. This walkthrough demonstrates a practical approach using command-line tools and computer vision libraries. Initial Video Composition Two source videos containing concealed countdown sequences were combined using FFmpeg's mixing filter. The dire ...

1. Time Handling in PyQt5 To retrieve the current system time within a PyQt5 application, use the QDateTime.currentDateTime() method. This provides a Qt-specific way to access date and time information. Alternatively, the standard Python datetime module can also be used. 2. System Performance Monitoring The psutil module allows developers to mo ...