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Python - Eye blink detection project

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Replace Green Screen using OpenCV- Python

Last Updated :12 Jul, 2025

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Prerequisites:OpenCV Python Tutorial
OpenCV (Open Source Computer Vision) is a computer vision library that contains various functions to perform operations on pictures or videos. This library is cross-platform that is it is available on multiple programming languages such as Python, C++, etc.
Green Screen removal is used in the VFX industry for changing the scenes. Here, we will useOpenCV - Pythonto do the same.

Approach:

Import all necessary libraries
Load the images or videos
Resize the images and the videos to the same size
Load the upper and lower BGR values of the green color
Apply the mask and then use bitwise_and
Subtract bitwise_and from the original green screen image
Check for matrix value 0 after subtraction and replace it by the second image
You get the desired results.

Below is the implementation.

Python3

importcv2importnumpyasnpvideo=cv2.VideoCapture("green.mp4")image=cv2.imread("bg.jpeg")whileTrue:ret,frame=video.read()frame=cv2.resize(frame,(640,480))image=cv2.resize(image,(640,480))u_green=np.array([104,153,70])l_green=np.array([30,30,0])mask=cv2.inRange(frame,l_green,u_green)res=cv2.bitwise_and(frame,frame,mask=mask)f=frame-resf=np.where(f==0,image,f)cv2.imshow("video",frame)cv2.imshow("mask",f)ifcv2.waitKey(25)==27:breakvideo.release()cv2.destroyAllWindows()

Output:

Screenshot-from-2020-04-21-22-42-28-copy

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Prerequisites: Python GUI â€“ tkinter, Create a Voice Recorder using Python Python provides various tools and can be used for various purposes. One such purpose is recording voice. It can be done using the sounddevice module. This recorded file can be saved using the soundfile module Module NeededSoun

Create a Sideshow application in Python

In this article, we will create a slideshow application i.e we can see the next image without changing it manually or by clicking.Â Modules Required:Tkinter: The tkinter package (â€œTk interfaceâ€) is the standard Python interface to the Tk GUI toolkit.Pillow: The Python Imaging Library adds image proc

Visiting Card Scanner GUI Application using Python

Python is an emerging programming language that consists of many in-built modules and libraries. Which provides support to many web and agile applications. Due to its clean and concise syntax behavior, many gigantic and renowned organizations like Instagram, Netflix so-and-so forth are working in Py

Turtle Projects

Create digital clock using Python-Turtle

Turtle is a special feature of Python. Using Turtle, we can easily draw on a drawing board. First, we import the turtle module. Then create a window, next we create a turtle object and using the turtle methods we can draw in the drawing board. Prerequisites: Turtle Programming in Python Installation

Draw a Tic Tac Toe Board using Python-Turtle

The Task Here is to Make a Tic Tac Toe board layout using Turtle Graphics in Python. For that lets first know what is Turtle Graphics. Turtle graphics In computer graphics, turtle graphics are vector graphics using a relative cursor upon a Cartesian plane. Turtle is drawing board like feature which

Draw Chess Board Using Turtle in Python

Prerequisite: Turtle Programming Basics Turtle is an inbuilt module in Python. It provides drawing using a screen (cardboard) and turtle (pen). To draw something on the screen, we need to move the turtle (pen). To move turtle, there are some functions i.e forward(), backward(), etc. For drawing Ches

Draw an Olympic Symbol in Python using Turtle

Prerequisites: Turtle Programming in Python The Olympic rings are five interlaced rings, colored blue, yellow, black, green, and red on a white field. As shown in the below image. Approach:import Turtle moduleset the thickness for each ringdraw each circle with specific coordinates Below is the impl

Draw Rainbow using Turtle Graphics in Python

Turtle is an inbuilt module in Python. It provides:Â Drawing using a screen (cardboard).Turtle (pen). To draw something on the screen, we need to move the turtle (pen), and to move the turtle, there are some functions like the forward(), backward(), etc. Prerequisite: Turtle Programming Basics Draw

How to Make an Indian Flag in Python

Here, we will be making "The Great Indian Flag" using Python. Python's turtle graphics module is built into the Python software installation and is part of the standard library. This means that you don't need to install anything extra to use the turtle lib. Here, we will be using many turtle functio

Draw moving object using Turtle in Python

Prerequisite: Python Turtle Basics Turtle is an inbuilt module in python. It provides drawing using a screen (cardboard) and turtle (pen). To draw something on the screen, we need to move the turtle. To move turtle, there are some functions i.e forward(), backward(), etc. 1.)Move the Object (ball)

Create a simple Animation using Turtle in Python

Turtle is a built-in Python module that provides a simple way to draw and create graphics using a virtual turtle on the screen. You can control the turtle using commands like forward() and right() to move it around and draw shapes. In this article, we'll use Turtle to create a fun animation where mu

Create a Simple Two Player Game using Turtle in Python

Prerequisites: Turtle Programming in Python TurtleMove game is basically a luck-based game. In this game two-players (Red & Blue), using their own turtle (object) play the game. How to play The game is played in the predefined grid having some boundaries. Both players move the turtle for a unit

Flipping Tiles (memory game) using Python3

Flipping tiles game can be played to test our memory. In this, we have a certain even number of tiles, in which each number/figure has a pair. The tiles are facing downwards, and we have to flip them to see them. In a turn, one flips 2 tiles, if the tiles match then they are removed. If not then the

Create pong game using Python - Turtle

Pong is one of the most famous arcade games, simulating table tennis. Each player controls a paddle in the game by dragging it vertically across the screen's left or right side. Players use their paddles to strike back and forth on the ball. Turtle is an inbuilt graphic module in Python. It uses a p

OpenCV Projects

Python | Program to extract frames using OpenCV

OpenCV comes with many powerful video editing functions. In the current scenario, techniques such as image scanning and face recognition can be accomplished using OpenCV. OpenCV library can be used to perform multiple operations on videos. Letâ€™s try to do something interesting using CV2. Take a vide

Displaying the coordinates of the points clicked on the image using Python-OpenCV

OpenCV helps us to control and manage different types of mouse events and gives us the flexibility to operate them. There are many types of mouse events. These events can be displayed by running the following code segment : import cv2 [print(i) for i in dir(cv2) if 'EVENT' in i] Output : EVENT_FLAG_

White and black dot detection using OpenCV | Python

Image processing using Python is one of the hottest topics in today's world. But image processing is a bit complex and beginners get bored in their first approach. So in this article, we have a very basic image processing python program to count black dots in white surface and white dots in the blac

Python | OpenCV BGR color palette with trackbars

OpenCV is a library of programming functions mainly aimed at real-time computer vision. In this article, Let's create a window which will contain RGB color palette with track bars. By moving the trackbars the value of RGB Colors will change b/w 0 to 255. So using the same, we can find the color with

Draw a rectangular shape and extract objects using Python's OpenCV

OpenCV is an open-source computer vision and machine learning software library. Various image processing operations such as manipulating images and applying tons of filters can be done with the help of it. It is broadly used in Object detection, Face Detection, and other Image processing tasks. Let'

Drawing with Mouse on Images using Python-OpenCV

OpenCV is a huge open-source library for computer vision, machine learning, and image processing. OpenCV supports a wide variety of programming languages like Python, C++, Java, etc. It can process images and videos to identify objects, faces, or even the handwriting of a human. In this article, we

Text Detection and Extraction using OpenCV and OCR

Optical Character Recognition (OCR) is a technology used to extract text from images which is used in applications like document digitization, license plate recognition and automated data entry. In this article, we explore how to detect and extract text from images using OpenCV for image processing

Invisible Cloak using OpenCV | Python Project

Have you ever seen Harry Potter's Invisible Cloak; Was it wonderful? Have you ever wanted to wear that cloak? If Yes!! then in this post, we will build the same cloak which Harry Potter uses to become invisible. Yes, we are not building it in a real way but it is all about graphics trickery. In this

Background subtraction - OpenCV

Background subtraction is a way of eliminating the background from image. To achieve this we extract the moving foreground from the static background. Background Subtraction has several use cases in everyday life, It is being used for object segmentation, security enhancement, pedestrian tracking, c

ML | Unsupervised Face Clustering Pipeline

Live face-recognition is a problem that automated security division still face. With the advancements in Convolutions Neural Networks and specifically creative ways of Region-CNN, itâ€™s already confirmed that with our current technologies, we can opt for supervised learning options such as FaceNet, Y

Pedestrian Detection using OpenCV-Python

OpenCV is an open-source library, which is aimed at real-time computer vision. This library is developed by Intel and is cross-platform - it can support Python, C++, Java, etc. Computer Vision is a cutting edge field of Computer Science that aims to enable computers to understand what is being seen

Saving Operated Video from a webcam using OpenCV

OpenCV is a vast library that helps in providing various functions for image and video operations. With OpenCV, we can perform operations on the input video. OpenCV also allows us to save that operated video for further usage. For saving images, we use cv2.imwrite() which saves the image to a specif

Face Detection using Python and OpenCV with webcam

Face detection is a important application of computer vision that involves identifying human faces in images or videos. In this Article, we will see how to build a simple real-time face detection application using Python and OpenCV where webcam will be used as the input source.Step 1: Installing Ope

Gun Detection using Python-OpenCV

Gun Detection using Object Detection is a helpful tool to have in your repository. It forms the backbone of many fantastic industrial applications. We can use this project for real threat detection in companies or organizations.Â Prerequisites: Python OpenCVÂ OpenCV(Open Source Computer Vision Libra

Multiple Color Detection in Real-Time using Python-OpenCV

For a robot to visualize the environment, along with the object detection, detection of its color in real-time is also very important. Why this is important? : Some Real-world ApplicationsIn self-driving car, to detect the traffic signals.Multiple color detection is used in some industrial robots, t

Detecting objects of similar color in Python using OpenCV

OpenCVÂ is a library of programming functions mainly aimed at real-time computer vision. In this article, we will see how to get the objects of the same color in an image. We can select a color by slide bar which is created by the cv2 command cv2.createTrackbar. Libraries needed:OpenCV NumpyApproach:

Opening multiple color windows to capture using OpenCV in Python

OpenCV is an open source computer vision library that works with many programming languages and provides a vast scope to understand the subject of computer vision.In this example we will use OpenCV to open the camera of the system and capture the video in two different colors. Approach: With the lib

Python | Play a video in reverse mode using OpenCV

OpenCV (Open Source Computer Vision) is a computer vision library that contains various functions to perform operations on Images or videos. OpenCV's application areas include : 1) Facial recognition system 2) motion tracking 3) Artificial neural network 4) Deep neural network 5) video streaming etc

Template matching using OpenCV in Python

Template matching is a technique for finding areas of an image that are similar to a patch (template).Â A patch is a small image with certain features. The goal of template matching is to find the patch/template in an image.Â To find it, the user has to give two input images:Â Source Image (S)Â - The im

Cartooning an Image using OpenCV - Python

Instead of sketching images by hand we can use OpenCV to convert a image into cartoon image. In this tutorial you'll learn how to turn any image into a cartoon. We will apply a series of steps like:Smoothing the image (like a painting)Detecting edges (like a sketch)Combining both to get a cartoon ef

Vehicle detection using OpenCV Python

Vehicle detection is an important application of computer vision that helps in monitoring traffic, automating parking systems and surveillance systems. In this article, weâ€™ll implement a simple vehicle detection system using Python and OpenCV using a pre-trained Haar Cascade classifier and we will g

Count number of Faces using Python - OpenCV

Prerequisites: Face detection using dlib and openCV In this article, we will use image processing to detect and count the number of faces. We are not supposed to get all the features of the face. Instead, the objective is to obtain the bounding box through some methods i.e. coordinates of the face i

Live Webcam Drawing using OpenCV

Let us see how to draw the movement of objects captured by the webcam using OpenCV. Our program takes the video input from the webcam and tracks the objects we are moving. After identifying the objects, it will make contours precisely. After that, it will print all your drawing on the output screen.

Detect and Recognize Car License Plate from a video in real time

Recognizing a Car License Plate is a very important task for a camera surveillance-based security system. We can extract the license plate from an image using some computer vision techniques and then we can use Optical Character Recognition to recognize the license number. Here I will guide you thro

Track objects with Camshift using OpenCV

OpenCV is the huge open-source library for computer vision, machine learning, and image processing and now it plays a major role in real-time operation which is very important in todayâ€™s systems. By using it, one can process images and videos to identify objects, faces, or even the handwriting of a

Replace Green Screen using OpenCV- Python

Prerequisites: OpenCV Python TutorialOpenCV (Open Source Computer Vision) is a computer vision library that contains various functions to perform operations on pictures or videos. This library is cross-platform that is it is available on multiple programming languages such as Python, C++, etc.Green

Python - Eye blink detection project

In this tutorial you will learn about detecting a blink of human eye with the feature mappers knows as haar cascades. Here in the project, we will use the python language along with the OpenCV library for the algorithm execution and image processing respectively. The haar cascades we are going to us

Connect your android phone camera to OpenCV - Python

Prerequisites: OpenCV OpenCV is a huge open-source library for computer vision, machine learning, and image processing. OpenCV supports a wide variety of programming languages like Python, C++, Java, etc. It can process images and videos to identify objects, faces, or even the handwriting of a human

Determine The Face Tilt Using OpenCV - Python

In this article, we are going to see how to determine the face tilt using OpenCV in Python. To achieve this we will be using a popular computer vision library opencv-python. In this program with the help of the OpenCV library, we will detect faces in a live stream from a webcam or a video file and s

Right and Left Hand Detection Using Python

In this article, we are going to see how to Detect Hands using Python. We will use mediapipe and OpenCV libraries in python to detect the Right Hand and Left Hand. We will be using the Hands model from mediapipe solutions to detect hands, it is a palm detection model that operates on the full image

Brightness Control With Hand Detection using OpenCV in Python

In this article, we are going to make a Python project that uses OpenCV and Mediapipe to see hand gesture and accordingly set the brightness of the system from a range of 0-100.Â We have used a HandTracking module that tracks all points on the hand and detects hand landmarks, calculate the distance

Creating a Finger Counter Using Computer Vision and OpenCv in Python

In this article we are going to create a finger counter using Computer Vision and OpenCv. This is a simple project that can be applied in various fields such as gesture recognition, human-computer interaction and educational tools. By the end of this article you will have a working Python applicatio

Python Django Projects

Python Web Development With Django

Python Django is a web framework that allows to quickly create efficient web pages. Django is also called batteries included framework because it provides built-in features such as Django Admin Interface, default database - SQLite3, etc. When youâ€™re building a website, you always need a similar set

How to Create an App in Django ?

In Django, an app is a web application that performs a specific functionality, such as blog posts, user authentication or comments. A single Django project can consist of multiple apps, each designed to handle a particular task. Each app is a modular and reusable component that includes everything n

Weather app using Django - Python

Our task is to create a Weather app using Django that lets users enter a city name and view current weather details like temperature, humidity, and pressure. We will build this by setting up a Django project, creating a view to fetch data from the OpenWeatherMap API, and designing a simple template

Django Sign Up and login with confirmation Email | Python

Django provides a built-in authentication system that handles users, login, logout, and registration. In this article, we will implement a user registration and login system with email confirmation using Django and django-crispy-forms for elegant form rendering.Install crispy forms using the termina

ToDo webapp using Django

Our task is to create a simple ToDo app using Django that allows users to add, view, and delete notes. We will build this by setting up a Django project, creating a Todo model, designing forms and views to handle user input, and creating templates to display the tasks. Step-by-step, we'll implement

How to Send Email with Django

Django, a high-level Python web framework, provides built-in functionality to send emails effortlessly. Whether you're notifying users about account activations, sending password reset links, or dispatching newsletters, Djangoâ€™s robust email handling system offers a straightforward way to manage ema

Django project to create a Comments System

We will build a straightforward Django app where users can view posts and add comments, all using just two simple templates. We will learn how to set up models, handle form submissions and create clean views to power an interactive comment system. Itâ€™s perfect for getting a solid foundation with Dja

Voting System Project Using Django Framework

Project Title: Pollster (Voting System) web application using Django frameworkType of Application (Category): Web application.Introduction: We will create a pollster (voting system) web application using Django. This application will conduct a series of questions along with many choices. A user will

Determine The Face Tilt Using OpenCV - Python

In this article, we are going to see how to determine the face tilt using OpenCV in Python. To achieve this we will be using a popular computer vision library opencv-python. In this program with the help of the OpenCV library, we will detect faces in a live stream from a webcam or a video file and s

How to add Google reCAPTCHA to Django forms ?

We will learn how to integrate Google reCAPTCHA into our Django forms to protect our website from spam and automated bots. We'll cover everything from registering our site with Google, setting up the necessary keys in your Django project, to adding the reCAPTCHA widget in your forms and validating i

E-commerce Website using Django

This project deals with developing a Virtual website â€˜E-commerce Websiteâ€™. It provides the user with a list of the various products available for purchase in the store. For the convenience of online shopping, a shopping cart is provided to the user. After the selection of the goods, it is sent for t

College Management System using Django - Python Project

In this article, we are going to build College Management System using Django and will be using dbsqlite database. In the times of covid, when education has totally become digital, there comes a need for a system that can connect teachers, students, and HOD and that was the motivation behind buildin

Create Word Counter App using Django

Our task is to build a simple Django application that counts the number of words in a given text. This is a great beginner project if you have some basic knowledge of Django.Refer to the below article to know about basics of Django.Django BasicsHow to Create a Basic Project using MVT in Django ?Step

Python Text to Speech and Vice-Versa

Speak the meaning of the word using Python

The following article shows how by the use of two modules named, pyttsx3 and PyDictionary, we can make our system say out the meaning of the word given as input. It is module which speak the meaning when we want to have the meaning of the particular word. Modules neededPyDictionary: It is a Dictiona

Convert PDF File Text to Audio Speech using Python

Let us see how to read a PDF that is converting a textual PDF file into audio.Packages Used:pyttsx3: It is a Python library for Text to Speech. It has many functions which will help the machine to communicate with us. It will help the machine to speak to usPyPDF2: It will help to the text from the P

Speech Recognition in Python using Google Speech API

Speech recognition means converting spoken words into text. It used in various artificial intelligence applications such as home automation, speech to text, etc. In this article, youâ€™ll learn how to do basic speech recognition in Python using the Google Speech Recognition API.Step 1: Install Require

Convert Text to Speech in Python

There are several APIs available to convert text to speech in Python. One of such APIs is the Google Text to Speech API commonly known as the gTTS API. gTTS is a very easy to use tool which converts the text entered, into audio which can be saved as a mp3 file. The gTTS API supports several language

Python Text To Speech | pyttsx module

pyttsx is a cross-platform text to speech library which is platform independent. The major advantage of using this library for text-to-speech conversion is that it works offline. However, pyttsx supports only Python 2.x. Hence, we will see pyttsx3 which is modified to work on both Python 2.x and Pyt

Python: Convert Speech to text and text to Speech

Speech Recognition is an important feature in several applications used such as home automation, artificial intelligence, etc. This article aims to provide an introduction on how to make use of the SpeechRecognition and pyttsx3 library of Python.Installation required: Python Speech Recognition modul

Personal Voice Assistant in Python

As we know Python is a suitable language for script writers and developers. Let's write a script for Personal Voice Assistant using Python. The query for the assistant can be manipulated as per the user's need. The implemented assistant can open up the application (if it's installed in the system),

Build a Virtual Assistant Using Python

Virtual desktop assistant is an awesome thing. If you want your machine to run on your command like Jarvis did for Tony. Yes it is possible. It is possible using Python. Python offers a good major library so that we can use it for making a virtual assistant. Windows has Sapi5 and Linux has Espeak wh

Python | Create a simple assistant using Wolfram Alpha API.

The Wolfram|Alpha Webservice API provides a web-based API allowing the computational and presentation capabilities of Wolfram|Alpha to be integrated into web, mobile, desktop, and enterprise applications. Wolfram Alpha is an API which can compute expert-level answers using Wolframâ€™s algorithms, know

Voice Assistant using python

Speech recognition is the process of turning spoken words into text. It is a key part of any voice assistant. In Python the SpeechRecognition module helps us do this by capturing audio and converting it to text. In this guide weâ€™ll create a basic voice assistant using Python.Step 1: Install Required

Voice search Wikipedia using Python

Every day, we visit so many applications, be it messaging platforms like Messenger, Telegram or ordering products on Amazon, Flipkart, or knowing about weather and the list can go on. And we see that these websites have their own software program for initiating conversations with human beings using

Language Translator Using Google API in Python

API stands for Application Programming Interface. It acts as an intermediate between two applications or software. In simple terms, API acts as a messenger that takes your request to destinations and then brings back its response for you. Google API is developed by Google to allow communications wit

How to make a voice assistant for E-mail in Python?

As we know, emails are very important for communication as each professional communication can be done by emails and the best service for sending and receiving mails is as we all know GMAIL. Gmail is a free email service developed by Google. Users can access Gmail on the web and using third-party pr

Voice Assistant for Movies using Python

In this article, we will see how a voice assistant can be made for searching for movies or films. After giving input as movie name in audio format and it will give the information about that movie in audio format as well. As we know the greatest searching website for movies is IMDb. IMDb is an onlin

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