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Raspberry Pi Robotic Blueprints

You're reading from   Raspberry Pi Robotic Blueprints Utilize the powerful ingredients of Raspberry Pi to bring to life your amazing robots that can act, draw, and have fun with laser tags

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Product type Paperback
Published in Oct 2015
Publisher
ISBN-13 9781784396282
Length 198 pages
Edition 1st Edition
Concepts
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Toc

Table of Contents (9) Chapters Close

Preface 1. Adding Raspberry Pi to an RC Vehicle 2. Adding Raspberry Pi to a Humanoid Robot FREE CHAPTER 3. Building a Tracked Vehicle That Can Plan Its Own Path 4. Building a Robot That Can Play Laser Tag 5. A Robot That Can Draw 6. A Robot That Can Play Air Hockey 7. A Robot That Can Fly Index

Seeing the puck using OpenCV


To know where the puck is, you'll need vision. Fortunately, adding hardware and software for vision for Raspberry Pi is both easy and inexpensive. First, you'll need to connect to a USB webcam.

Installing a USB camera on Raspberry Pi

Connecting a USB camera is very easy. Just plug it in the USB slot. To make sure your device is connected, type lsusb. You will see the following:

This shows a Logitech webcam located at Bus 001 Device 008: ID 046d:0825. To make sure that the system sees this as a video device, type ls /dev/v* and you will see something similar to the following:

The /dev/video0 is the webcam device. Now that your device is connected, let's see whether you can actually capture images and videos. There are several tools that can allow you to access the webcam, but a simple program with video controls is called guvcview. To install this, type sudo apt-get install guvcview. Once the application is installed, you'll want to run it. To do this, you'll either...

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