Data
Reader small image

You're reading from  Raspberry Pi Computer Vision Programming. - Second Edition

Product typeBook
Published inJun 2020
Reading LevelBeginner
PublisherPackt
ISBN-139781800207219
Edition2nd Edition
Languages
Python
Tools
OpenCV
Concepts
Computer Vision
Right arrow
Author (1)
Ashwin Pajankar
Ashwin Pajankar
author image
Ashwin Pajankar

Ashwin Pajankar is an author, a YouTuber, and an instructor. He graduated from the International Institute of Information Technology, Hyderabad, with an MTech in Computer Science and Engineering. He has been writing programs for over two and a half decades. He is proficient in Linux, Unix shell scripting, C, C++, Java, JavaScript, Python, PowerShell, Golang, HTML, and assembly language. He has worked on single-board computers such as Raspberry Pi and Banana Pro. He is also proficient with microcontroller boards such as Arduino and the BBC Micro:bit. He is currently self-employed and teaches on Udemy and YouTube. He also organizes programming boot camps for working professionals and software companies.
Read more about Ashwin Pajankar

Right arrow

Perspective transformation of images

In the mathematical operation of perspective transformation, a set of four points in the input image is mapped to a set of four points in the output image. The criteria for selecting the set of four points in the input and the output image is that any three points (in the input and the output image) must not be in the same line. Like affine mathematical transformation, in perspective transformation, the straight lines in the input images remain straight. However, there is no guarantee that the parallel lines in the input image remain parallel in the output image.

One of the most prominent real-life examples of this mathematical operation is the zoom and the angled zoom functions in image editing and viewing software tools. The amount of zoom and angle of zooming depend on the matrix of the transformation that is computed by the two sets of points that we discussed earlier. OpenCV provides the cv2.getPerspectiveTransform() function, which accepts...

lock icon
The rest of the page is locked
Previous Page
Chapter 7 of 15, Page 5
Next Page
You have been reading a chapter from
Raspberry Pi Computer Vision Programming. - Second Edition
Published in: Jun 2020Publisher: PacktISBN-13: 9781800207219
© 2020 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Ashwin Pajankar

Ashwin Pajankar is an author, a YouTuber, and an instructor. He graduated from the International Institute of Information Technology, Hyderabad, with an MTech in Computer Science and Engineering. He has been writing programs for over two and a half decades. He is proficient in Linux, Unix shell scripting, C, C++, Java, JavaScript, Python, PowerShell, Golang, HTML, and assembly language. He has worked on single-board computers such as Raspberry Pi and Banana Pro. He is also proficient with microcontroller boards such as Arduino and the BBC Micro:bit. He is currently self-employed and teaches on Udemy and YouTube. He also organizes programming boot camps for working professionals and software companies.
Read more about Ashwin Pajankar

Other recommended products

Related to this chapter

Hands-On Internet of Things with Blynk

Hands-On Internet of Things with Blynk

Blynk is gaining a lot of popularity among the masses as it is simple and portable to use, and it comes under mobile applications and devices. The book will introduce you to Blynk and will demonstrate how to setup the environment for building IoT applications. You will then deep dive into concepts like building a notification widget, display widget, and controller widgets. Besides this, you will learn how to build a Blynk server and then create a Blynk application on it. You will have hands-on experience in building IoT applications using Blynk.

BookMay 2018271 pages
Hands-On GPU-Accelerated Computer Vision with OpenCV and CUDA

Hands-On GPU-Accelerated Computer Vision with OpenCV and CUDA

This book is a guide to explore how accelerating of computer vision applications using GPUs will help you develop algorithms that work on complex image data in real time. It will solve the problems you face while deploying these algorithms on embedded platforms with the help of development boards from NVIDIA such as the Jetson TX1, Jetson TX2, and Jetson TK1.

BookSep 2018380 pages
Hands-On Robotics Programming with C++

Hands-On Robotics Programming with C++

C/C++ is one the legacy programming language for Robotics Programming. This book will help you understand and build complexly structured robots and implement various C/C++ programming libraries in it.

BookMar 2019312 pages
OpenCV 3.x with Python By Example

OpenCV 3.x with Python By Example

Computer vision is found everywhere in modern technology. OpenCV for Python enables us to run computer vision algorithms in real time. With the advent of powerful machines, we have more processing power to work with. Using this technology, we can seamlessly integrate our computer vision applications into the cloud. Focusing on OpenCV 3.x and Python 3.6, this book will walk you through all the building blocks needed to build amazing computer vision applications with ease.

BookJan 2018268 pages
Mastering OpenCV 4 with Python

Mastering OpenCV 4 with Python

Mastering OpenCV 4 with Python is a comprehensive guide to help you to get acquainted with various computer vision algorithms running in real-time. This book will help you to build complete projects on image processing, motion detection, and image segmentation where you can gain advanced computer vision techniques.

BookMar 2019532 pages
OpenCV 3 Computer Vision with Python Cookbook

OpenCV 3 Computer Vision with Python Cookbook

OpenCV 3 is a native cross-platform library for computer vision, machine learning, and image processing. OpenCV's convenient high-level APIs hide very powerful internals designed for computational efficiency that can take advantage of multicore and GPU processing. This book will help you tackle increasingly challenging computer vision problems by providing a number of recipes that you can use to improve your applications.

BookMar 2018306 pages
Raspberry Pi 3 Projects for Java Programmers

Raspberry Pi 3 Projects for Java Programmers

This book will try to create starting points for Java developers who would like to extend their knowledge on how to interact with hardware on the Raspberry Pi by providing small real world usable projects. After reading this book the reader will be able to build their own real world usable projects not limited to Home Automation, IoT and/or Robotics utilizing logic, user- and web interfaces.

BookMay 2017286 pages
The Computer Vision Workshop

The Computer Vision Workshop

With The Computer Vision Workshop, you’ll explore the basic and advanced techniques in video and image processing using OpenCV and Python. It is filled with real-world exercises and activities that will make the learning process easy and enjoyable.

BookJul 2020568 pages
Hands-On Algorithms for Computer Vision

Hands-On Algorithms for Computer Vision

The field of Computer Vision has seen advancements in terms of processing power and performance. Many algorithms are introduced to perform Computer Vision tasks efficiently. This book is a starting point for anyone interested in this field and wants to dig deeper into the most practical algorithms used by professional Computer Vision developers.

BookJul 2018290 pages
Raspberry Pi Zero W Wireless Projects

Raspberry Pi Zero W Wireless Projects

Wireless communications have spread over the whole world, as the new era of Internet of Things come closer and closer. Low-energy hardware such as the Raspberry Pi Zero Wireless is perfect for many projects. This book introduces you to Raspberry Pi Zero W, the new family member with a wireless extension. Throughout the book, readers will learn how to build inexpensive, fast, and awesome projects to change their everyday routines.

BookAug 2017240 pages
Internet of Things Programming Projects

Internet of Things Programming Projects

Taking a project-based approach this book will help you leverage sensors, actuators, Python programming and Raspberry Pi 3 to build connected things. Each chapter is an independent project where you will learn from connecting devices to building complex IoT projects. You will be well versed in every possible way to make your projects stand out.

BookOct 2018436 pages
Computer Vision with Python 3

Computer Vision with Python 3

The field of computer vision involves designing and implementing algorithms to understand images and extract meaningful information from them. This book enables you to build real-world applications using Python and open source image processing libraries.

BookAug 2017206 pages

Personalised recommendations for you

Based on your interests and search pattern

Et al.

Et al.

Ever wonder why speech recognition systems don't understand the Scottish accent, or what would happen if an astronaut only ate mac 'n' cheese, or other spurious reflections you'd have at a bar? We did, then collated those deliberations into absurd research articles with fake figures and methodologies inspired by even more fictionally absurd studies.

BookAug 2023230 pages5
Generative AI with LangChain

Generative AI with LangChain

This book is a comprehensive introduction to LLMs and LangChain, demystifying the basic mechanics of LangChain, its functionalities, and the myriad of applications it can be integrated into.

BookDec 2023360 pages4
Generative AI with LangChain

Generative AI with LangChain

This book is a comprehensive introduction to LLMs and LangChain, demystifying the basic mechanics of LangChain, its functionalities, and the myriad of applications it can be integrated into.

BookDec 2023360 pages5
Generative AI with LangChain

Generative AI with LangChain

This book is a comprehensive introduction to LLMs and LangChain, demystifying the basic mechanics of LangChain, its functionalities, and the myriad of applications it can be integrated into.

BookDec 2023360 pages1
Generative AI with LangChain

Generative AI with LangChain

This book is a comprehensive introduction to LLMs and LangChain, demystifying the basic mechanics of LangChain, its functionalities, and the myriad of applications it can be integrated into.

BookDec 2023360 pages5
Mastering Tableau 2023

Mastering Tableau 2023

This book is a comprehensive resource to mastering your Tableau skills and becoming a BI expert. As you progress, you will learn how to build advanced dashboards and improve your storytelling to derive key business insight, as well as make you well-versed with advanced functionalities of Tableau in the business intelligence domain.

BookAug 2023684 pages
Building AI Applications with ChatGPT APIs

Building AI Applications with ChatGPT APIs

This guide covers all ChatGPT API features for effortless creation of robust AI powered apps. With its help, you’ll be able to leverage ChatGPT’s cutting-edge NLP models to take your app development skills to the next level. You’ll also work on ten exciting projects that will give you the practical know-how that you can apply to your existing applications.

BookSep 2023258 pages5
Building AI Applications with ChatGPT APIs

Building AI Applications with ChatGPT APIs

This guide covers all ChatGPT API features for effortless creation of robust AI powered apps. With its help, you’ll be able to leverage ChatGPT’s cutting-edge NLP models to take your app development skills to the next level. You’ll also work on ten exciting projects that will give you the practical know-how that you can apply to your existing applications.

BookSep 2023258 pages2
Data Engineering with AWS

Data Engineering with AWS

Embark on a journey to master data engineering pipelines on AWS! Our book offers a hands-on experience of AWS services for ingesting, transforming, and consuming data. Whether you're an absolute beginner or someone with basic data engineering experience, this guide is an indispensable resource.

BookOct 2023636 pages5
Modern Data Architecture on AWS

Modern Data Architecture on AWS

Every organization wants an agile, performant, and cost-effective data platform that meets all their current and future business needs. Purpose-built AWS analytics services and their features play a big part in building such a modern data platform. This book brings to you all the design and architectural patterns that’ll help you achieve this goal.

BookAug 2023420 pages5
Practical Guide to Applied Conformal Prediction in Python

Practical Guide to Applied Conformal Prediction in Python

Discover the power of Conformal Prediction with the "Practical Guide to Applied Conformal Prediction in Python." Master the latest techniques to quantify uncertainty in machine learning and computer vision models, and seamlessly apply them to your industry applications.

BookDec 2023240 pages
TinyML Cookbook

TinyML Cookbook

With over 70 project-based recipes, the TinyML Cookbook is a practical guide that will help you to get the most out of your microcontrollers. It provides a comprehensive understanding of the theoretical foundations while giving you hands-on experience training ML models for deployment on Arduino Nano 33 BLE Sense, Raspberry Pi Pico, and SparkFun RedBoard Artemis Nano microcontrollers.

BookNov 2023664 pages