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Cartooning an Image using OpenCV - Python
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Template matching using OpenCV in Python

Last Updated : 04 Jan, 2023
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Template matching is a technique for finding areas of an image that are similar to a patch (template). A patch is a small image with certain features. The goal of template matching is to find the patch/template in an image. To find it, the user has to give two input images: Source Image (S) - The image to find the template in, and Template Image (T) - The image that is to be found in the source image.  

  • It is basically a method for searching and finding the location of a template image in a larger image.
  • The idea here is to find identical regions of an image that match a template we provide, giving a threshold 
    • The threshold depends on the accuracy with which we want to detect the template in the source image.
    • For instance, if we are applying face recognition and we want to detect the eyes of a person, we can provide a random image of an eye as the template and search for the source (the face of a person).
    • In this case, since "eyes" show a large number of variations from person to person, even if we set the threshold as 50%(0.5), the eye will be detected.
    • In cases where almost identical templates are to be searched, the threshold should be set high.(t>=0.8)

How does Template Matching Work?

  • The template image simply slides over the input image (as in 2D convolution)
  • The template and patch of input image under the template image are compared.
  • The result obtained is compared with the threshold.
  • If the result is greater than the threshold, the portion will be marked as detected.
  • In the function cv2.matchTemplate(img_gray,template,cv2.TM_CCOEFF_NORMED) the first parameter is the mainimage, the second parameter is the template to be matched and the third parameter is the method used for matching.
Python 
# Python program to illustrate # template matching import cv2 import numpy as np  # Read the main image img_rgb = cv2.imread('mainimage.jpg').  # Convert it to grayscale img_gray = cv2.cvtColor(img_rgb, cv2.COLOR_BGR2GRAY)  # Read the template template = cv2.imread('template', 0)  # Store width and height of template in w and h w, h = template.shape[::-1]  # Perform match operations. res = cv2.matchTemplate(img_gray, template, cv2.TM_CCOEFF_NORMED)  # Specify a threshold threshold = 0.8  # Store the coordinates of matched area in a numpy array loc = np.where(res >= threshold)  # Draw a rectangle around the matched region. for pt in zip(*loc[::-1]):     cv2.rectangle(img_rgb, pt, (pt[0] + w, pt[1] + h), (0, 255, 255), 2)  # Show the final image with the matched area. cv2.imshow('Detected', img_rgb)

Limitations of Template Matching: 

  1. Pattern occurrences have to preserve the orientation of the reference pattern image(template)
  2. As a result, it does not work for rotated or scaled versions of the template as a change in shape/size/shear, etc. of object w.r.t. the template will give a false match.
  3. The method is inefficient when calculating the pattern correlation image for medium to large images as the process is time-consuming.

To avoid the issue caused by the different sizes of the template and original image we can use multiscaling. In the case where, just because the dimensions of your template do not match the dimensions of the region in the image you want to match, does not mean that you cannot apply template matching. 

Multiscaling mechanism in Template Matching

The process of Multi scaling is as follows: 

  1. Loop over the input image at multiple scales (i.e. make the input image progressively smaller and smaller).
  2. Apply template matching using cv2.matchTemplate and keep track of the match with the largest correlation coefficient (along with the x, and y-coordinates of the region with the largest correlation coefficient).
  3. After looping over all scales, take the region with the largest correlation coefficient and use that as your “matched” region.
Python 
# Python program to illustrate # template matching import cv2 import numpy as np  # Read the main image img_rgb = cv2.imread('mainimage.jpg').  # Convert it to grayscale img_gray = cv2.cvtColor(img_rgb, cv2.COLOR_BGR2GRAY)  # Read the template template = cv2.imread('template', 0)  # Store width and height of template in w and h w, h = template.shape[::-1]  # Resize the image according to scale and # keeping track of ratio of resizing resize = imutils.resize(img_gray, width=int(shape[0]), height=int(img_gray.shape[1]*scale)  # If resize image is smaller than that of template # break the loop # Detect edges in the resized, grayscale image and apply template # Matching to find the template in image edged # If we have found a new maximum correlation value, update # the found variable if # found = null/maxVal > found][0] if resized.shape[0] < h or resized.shape[1] < w:           break found=(maxVal, maxLoc, r)  # Unpack the found variables and compute(x,y) coordinates # of the bounding box (__, maxLoc, r)=found (startX, startY)=(int(maxLoc[0]*r), int maxLoc[1]*r) (endX, endY)=(int((maxLoc[0]+tw)*r), int(maxLoc[1]+tH)*r)  # Draw a bounding box around the detected result and display the image cv2.rectangle(image, (startX, startY), (endX, endY), (0, 0, 255), 2) cv2.imshow("Image", image) cv2.waitKey(0)

A step-by-step explanation of the above code is as follows: 

  • After storing the width and height of the template in w and r, we initialize a variable found to keep track of the region and scale of the image with the best match. From there we start looping over the multiple scales of the image using the np.linspace function. This function accepts three arguments, the starting value, the ending value, and the number of equal chunk slices in between. In this example, we’ll start from 100% of the original size of the image and work our way down to 20% of the original size in 20 equally sized percent chunks.
  • We then resize the image according to the current scale and compute the ratio of the old width to the new width — as you’ll see later, it’s important that we keep track of this ratio. We make a check to ensure that the input image is larger than our template matching. If the template is larger, then our cv2.matchTemplate call will throw an error, so we just break from the loop if this is the case.
  • At this point we can apply template matching to our resized image: 
    • The cv2.minMaxLoc function takes our correlation result and returns a 4-tuple which includes the minimum correlation value, the maximum correlation value, the (x, y)-coordinate of the minimum value, and the (x, y)-coordinate of the maximum value, respectively. We are only interested in the maximum value and (x, y)-coordinate so we keep the maximums and discard the minimums.
  • After that, we inspect the regions of the image that are getting matched at each iteration of the scale. From there, we update our found variable found to keep track of the maximum correlation value found thus far, the (x, y)-coordinate of the maximum value, along with the ratio of the original image width to the current, resized image width.
  • After we have looped over all scales of the image, we unpack our found variable and then compute our starting and ending (x, y)-coordinates of our bounding box. Special care is taken to multiply the coordinates of the bounding box by the ratio to ensure that the coordinates match the original dimensions of the input image.
  • Finally, we draw our bounding box and display it on our screen.

 


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    Automating LinkedIn connections using Python involves creating a script that navigates LinkedIn, finds users based on specific criteria (e.g., job title, company, or location), and sends personalized connection requests. In this article, we will walk you through the process, using Selenium for web a
    5 min read

    Tkinter Projects

    Create First GUI Application using Python-Tkinter
    We are now stepping into making applications with graphical elements, we will learn how to make cool apps and focus more on its GUI(Graphical User Interface) using Tkinter.What is Tkinter?Tkinter is a Python Package for creating GUI applications. Python has a lot of GUI frameworks, but Tkinter is th
    12 min read
    Simple GUI calculator using Tkinter-Python
    Python offers multiple options for developing a GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. It is a standard Python interface to the Tk GUI toolkit shipped with Python. Python with Tkinter outputs the fastest and easiest way to create GUI app
    3 min read
    Python - Compound Interest GUI Calculator using Tkinter
    Python offers multiple options for developing a GUI (Graphical User Interface). Out of all the Python GUI Libraries, Tkinter is the most commonly used method. In this article, we will learn how to create a Compound Interest GUI Calculator application using Tkinter.Let’s create a GUI-based Compound I
    6 min read
    Python | Loan calculator using Tkinter
    Prerequisite: Tkinter Introduction  Python offers multiple options for developing GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. It is a standard Python interface to the Tk GUI toolkit shipped with Python. Python with Tkinter outputs the fastest
    5 min read
    Rank Based Percentile Gui Calculator using Tkinter
    Python offers multiple options for developing a GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. In this article, we will learn how to create a Rank Based - Percentile Gui Calculator application using Tkinter, with a step-by-step guide. Prerequisi
    7 min read
    Standard GUI Unit Converter using Tkinter in Python
    Prerequisites: Introduction to tkinter, Introduction to webbrowser In this article, we will learn how to create a standard converter using tkinter. Now we are going to create an introduction window that displays loading bar, welcome text, and user's social media profile links so that when he/she sha
    12 min read
    Create Table Using Tkinter
    Python offers multiple options for developing a GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. It is a standard Python interface to the Tk GUI toolkit shipped with Python. Python with Tkinter is the fastest and easiest way to create GUI applicat
    3 min read
    Python | GUI Calendar using Tkinter
    Prerequisites: Introduction to Tkinter Python offers multiple options for developing a GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. Python with Tkinter outputs the fastest and easiest way to create GUI applications. In this article, we will le
    4 min read
    File Explorer in Python using Tkinter
    Prerequisites: Introduction to Tkinter  Python offers various modules to create graphics programs. Out of these Tkinter provides the fastest and easiest way to create GUI applications.  The following steps are involved in creating a tkinter application:  Importing the Tkinter module. Creation of the
    2 min read
    Python | ToDo GUI Application using Tkinter
    Prerequisites : Introduction to tkinter  Python offers multiple options for developing GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. In this article, we will learn how to create a ToDo GUI application using Tkinter, with a step-by-step guide.
    5 min read
    Python: Weight Conversion GUI using Tkinter
    Prerequisites: Python GUI – tkinterPython offers multiple options for developing a GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. It is a standard Python interface to the Tk GUI toolkit shipped with Python. Python with Tkinter outputs the fastes
    2 min read
    Python: Age Calculator using Tkinter
    Prerequisites :Introduction to tkinter Python offers multiple options for developing a GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. It is a standard Python interface to the Tk GUI toolkit shipped with Python. Python with Tkinter outputs the fa
    5 min read
    Python | Create a GUI Marksheet using Tkinter
    Create a python GUI mark sheet. Where credits of each subject are given, enter the grades obtained in each subject and click on Submit. The credits per subject, the total credits as well as the SGPA are displayed after being calculated automatically. Use Tkinter to create the GUI interface.  Refer t
    8 min read
    Python | Create a digital clock using Tkinter
    As we know Tkinter is used to create a variety of GUI (Graphical User Interface) applications. In this article we will learn how to create a Digital clock using Tkinter. Prerequisites: Python functions Tkinter basics (Label Widget) Time module Using Label widget from Tkinter and time module: In the
    2 min read
    Create Countdown Timer using Python-Tkinter
    Prerequisites: Python GUI – tkinterPython Tkinter is a GUI programming package or built-in library. Tkinter provides the Tk GUI toolkit with a potent object-oriented interface. Python with Tkinter is the fastest and easiest way to create GUI applications. Creating a GUI using Tkinter is an easy task
    2 min read
    Tkinter Application to Switch Between Different Page Frames
    Prerequisites: Python GUI – tkinter Sometimes it happens that we need to create an application with several pops up dialog boxes, i.e Page Frames. Here is a step by step process to create multiple Tkinter Page Frames and link them! This can be used as a boilerplate for more complex python GUI applic
    6 min read
    Color game using Tkinter in Python
    TKinter is widely used for developing GUI applications. Along with applications, we can also use Tkinter GUI to develop games. Let's try to make a game using Tkinter. In this game player has to enter color of the word that appears on the screen and hence the score increases by one, the total time to
    4 min read
    Python | Simple FLAMES game using Tkinter
    Prerequisites: Introduction to TkinterProgram to implement simple FLAMES game Python offers multiple options for developing a GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. It is a standard Python interface to the Tk GUI toolkit shipped with Pyt
    5 min read
    Simple registration form using Python Tkinter
    Tkinter is Python's standard GUI (Graphical User Interface) library and OpenPyXL is a module that allows for reading and writing Excel files. This guide shows you how to create a simple registration form with Tkinter, where users enter their details and those details are written into an Excel file.
    2 min read
    Image Viewer App in Python using Tkinter
    Prerequisites: Python GUI – tkinter, Python: Pillow Have you ever wondered to make a Image viewer with the help of Python? Here is a solution to making the Image viewer with the help of Python. We can do this with the help of Tkinter and pillow. We will discuss the module needed and code below.  Mod
    5 min read
    How to create a COVID19 Data Representation GUI?
    Prerequisites: Python Requests, Python GUI – tkinterSometimes we just want a quick fast tool to really tell whats the current update, we just need a bare minimum of data. Web scraping deals with taking some data from the web and then processing it and displaying the relevant content in a short and c
    2 min read
    GUI to Shutdown, Restart and Logout from the PC using Python
    In this article, we are going to write a python script to shut down or Restart or Logout your system and bind it with GUI Application.  The OS module in Python provides functions for interacting with the operating system. OS is an inbuilt library python. Syntax : For shutdown your system : os.system
    1 min read
    Create a GUI to extract Lyrics from song Using Python
    In this article, we are going to write a python script to extract lyrics from the song and bind with its GUI application. We will use lyrics-extractor to get lyrics of a song just by passing in the song name, it extracts and returns the song's title and song lyrics from various websites. Before star
    3 min read
    Application to get live USD/INR rate Using Python
    In this article, we are going to write a python scripts to get live information of USD/INR rate and bind with it GUI application. Modules Required:bs4: Beautiful Soup is a Python library for pulling data out of HTML and XML files. Installation: pip install bs4requests: This module allows you to send
    3 min read
    Build an Application for Screen Rotation Using Python
    In this article, we are going to write a python script for screen rotation and implement it with GUI.  The display can be modified to four orientations using some methods from the rotatescreen module, it is a small Python package for rotating the screen in a system. Installation:pip install rotate-s
    2 min read
    Build an Application to Search Installed Application using Python
    In this article, we are going to write python scripts to search for an installed application on Windows and bind it with the GUI application. We are using winapps modules for managing installed applications on Windows. Prerequisite - Tkinter in Python To install the module, run this command in your
    6 min read
    Text detection using Python
    Python language is widely used for modern machine learning and data analysis. One can detect an image, speech, can even detect an object through Python. For now, we will detect whether the text from the user gives a positive feeling or negative feeling by classifying the text as positive, negative,
    4 min read
    Python - Spell Corrector GUI using Tkinter
    Python offers multiple options for developing a GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. Python with Tkinter outputs the fastest and easiest way to create GUI applications. In this article, we will learn how to create a GUI Spell Corrector
    5 min read
    Make Notepad using Tkinter
    Let's see how to create a simple notepad in Python using Tkinter. This notepad GUI will consist of various menu like file and edit, using which all functionalities like saving the file, opening a file, editing, cut and paste can be done. Now for creating this notepad, Python 3 and Tkinter should alr
    6 min read
    Sentiment Detector GUI using Tkinter - Python
    Prerequisites : Introduction to tkinter | Sentiment Analysis using Vader Python offers multiple options for developing a GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. Python with Tkinter outputs the fastest and easiest way to create GUI applica
    4 min read
    Create a GUI for Weather Forecast using openweathermap API in Python
    Prerequisites: Find current weather of any city using openweathermap API The idea of this article is to provide a simple GUI application to users to get the current temperature of any city they wish to see. The system also provides a simple user interface for simplification of application. It also p
    4 min read
    Build a Voice Recorder GUI using Python
    Prerequisites: Python GUI – 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
    2 min read
    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.  Modules Required:Tkinter: The tkinter package (“Tk interface”) is the standard Python interface to the Tk GUI toolkit.Pillow: The Python Imaging Library adds image proc
    2 min read
    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
    6 min read

    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
    3 min read
    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
    2 min read
    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
    2 min read
    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
    1 min read
    Draw Rainbow using Turtle Graphics in Python
    Turtle is an inbuilt module in Python. It provides:  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
    2 min read
    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
    3 min read
    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)
    2 min read
    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
    2 min read
    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
    4 min read
    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
    3 min read
    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
    3 min read

    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. Let’s try to do something interesting using CV2. Take a vide
    2 min read
    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_
    3 min read
    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
    4 min read
    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
    2 min read
    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'
    4 min read
    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
    3 min read
    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
    2 min read
    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
    4 min read
    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
    2 min read
    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, it’s already confirmed that with our current technologies, we can opt for supervised learning options such as FaceNet, Y
    15+ min read
    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
    3 min read
    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
    4 min read
    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
    3 min read
    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.  Prerequisites: Python OpenCV  OpenCV(Open Source Computer Vision Libra
    4 min read
    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
    4 min read
    Detecting objects of similar color in Python using OpenCV
    OpenCV 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:
    3 min read
    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
    2 min read
    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
    3 min read
    Template matching using OpenCV in Python
    Template matching is a technique for finding areas of an image that are similar to a patch (template). A patch is a small image with certain features. The goal of template matching is to find the patch/template in an image. To find it, the user has to give two input images: Source Image (S) - The im
    6 min read
    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
    2 min read
    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, we’ll implement a simple vehicle detection system using Python and OpenCV using a pre-trained Haar Cascade classifier and we will g
    3 min read
    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
    3 min read
    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.
    3 min read
    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
    11 min read
    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 today’s systems. By using it, one can process images and videos to identify objects, faces, or even the handwriting of a
    3 min read
    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
    1 min read
    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
    4 min read
    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
    2 min read
    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
    4 min read
    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
    5 min read
    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.  We have used a HandTracking module that tracks all points on the hand and detects hand landmarks, calculate the distance
    6 min read
    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
    5 min read

    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 you’re building a website, you always need a similar set
    15+ min read
    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
    3 min read
    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
    2 min read
    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
    7 min read
    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
    4 min read
    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, Django’s robust email handling system offers a straightforward way to manage ema
    4 min read
    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. It’s perfect for getting a solid foundation with Dja
    4 min read
    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
    13 min read
    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
    4 min read
    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
    3 min read
    E-commerce Website using Django
    This project deals with developing a Virtual website ‘E-commerce Website’. 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
    11 min read
    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
    15+ min read
    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
    3 min read

    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
    2 min read
    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
    2 min read
    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, you’ll learn how to do basic speech recognition in Python using the Google Speech Recognition API.Step 1: Install Require
    2 min read
    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
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    Python Text To Speech | pyttsx module
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