Book Image

Raspberry Pi 3 Projects for Java Programmers

By : Rajdeep Chandra, John Sirach, Pradeeka Seneviratne
Book Image

Raspberry Pi 3 Projects for Java Programmers

By: Rajdeep Chandra, John Sirach, Pradeeka Seneviratne

Overview of this book

Raspberry Pi is a small, low cost and yet very powerful development platform. It is used to interact with attached electronics by the use of it's GPIO pins for multiple use cases, mainly Home Automation and Robotics. Our book is a project-based guide that will show you how to utilize the Raspberry Pi's GPIO with Java and how you can leverage this utilization with your knowledge of Java. You will start with installing and setting up the necessary hardware to create a seamless development platform. You will then straightaway start by building a project that will utilize light for presence detection. Next, you will program the application, capable of handling real time data using MQTT and utilize RPC to publish data to adafruit.io. Further, you will build a wireless robot on top of the zuma chassis with the Raspberry Pi as the main controller. Lastly, you will end the book with advanced projects that will help you to create a multi-purpose IoT controller along with building a security camera that will perform image capture and recognize faces with the help of notifications. By the end of the book, you will be able to build your own real world usable projects not limited to Home Automation, IoT and/or Robotics utilizing logic, user and web interfaces.
Table of Contents (8 chapters)
4
Integrating a Real-Time IoT Dashboard

Working with video

as the key source for security purposes, rather than the still images. The video quality extends to full HD, which is 1080p, at a frame rate of 30.

It's time to work with video capture, which can be used as the key source for security purposes, rather than the still images. The video quality extends to full HD, which is 1080p, at a frame rate of 30. Listing 7-2 shows a Java program that can be used to capture video using the Raspberry Pi camera module and save a snapshot to the SD card. Replace Listing 7-1 with this:

Listing 7-2: SecurityCamera.java

package com.packt.B05688.chapter7; 

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.videoio.VideoCapture;

public class SecurityCamera {

static {
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
}

public static void main(String[] args) {
Core.setErrorVerbosity(false);
VideoCapture...