Packt Open Source
Packt Open Source books
Packt Open Source books will continue to be built around the “community experience distilled” motto, focussing on taking real advice from the community around projects, and refining and distilling it into easy to follow specialist information.
Through this, the Open Source Royalty Scheme will continue to support open source projects, offering a royalty for the sale of each book to the project on which that book was written.
Believe in Open Source
Open Source Awards
The Open Source Awards is an annual online event held by Packt Publishing to distinguish excellence among Open Source projects. We aim to play our part in the growth of Open Source software and see the annual Award as the ultimate platform for not only appreciating the great things projects have given back to the community but also supporting projects who have future potential to change things for the better.
Open Source Project Royalty Scheme
Packt believes in open source and helping to sustain and support its unique projects and communities. Therefore, when we sell a book written on an open source project, we pay a royalty directly to that project. As a result of purchasing one of our Open Source books, Packt will have given some of the money received to the Open Source project.
In the long term, we see ourselves and yourselves, as customers and readers of our books, as part of the Open Source ecosystem, providing sustainable revenue for the projects we publish on. Our aim at Packt is to establish publishing royalties as an essential part of the service and support business model that sustains open source.
To read up on the projects that are supported by the Packt Open Source Project Royalty Scheme, click the appropriate categories below:
In this article by Fazreil Amreen author of Instant GIMP Starter [Instant],Let's take a tour around GIMP for a start. This tour will give you an exposure to basic tasks to do with GIMP. Along the way, we will introduced to the GIMP conceptual idea that makes it different than some of the other image manipulation programs.Read A Tour Around GIMP in full
A web application always has, at some point, the need to deal with multiple types of content. Common content types include JSON, XML, HTML, but there could also be images or even videos to be stored and streamed. Play! 2 provides a clean way of dealing with such content types with the help of body parsers.
We won't cover the implementation details of such body parsers, because it's purely based on a functional concept, Iteratee, and thus their implementations are in Scala only. However, we'll see how they are used and how we can gain benefits from them.
In this article by Andy Petrella author of Learning Play! Framework 2, we'll update and clean up a bit of what we have been doing so far in order to enable several workflows. So we will only be using examples we have learned up to now. The following is what will be achieved:
Make the Chat and Item classes persistent using Ebean
Create a link between an item and a user (a user's reply in a chat)
Introduce a new type, Image, that will be part of a chat as an attachment
Enable a user to connect
Browse all chat instances
Allow the connected user to reply in a chat
Allow the connected user to attach an image to a chat
Show examples of UIs
Create an action that outputs a requested image
Create an action that provides an Atom feed of all chats which have specific users getting involved (kind of like following)
Having some skill with Tshark and analyzing our network on a regular basis can help us greatly in identifying multiple security issues. Besides the network attacks previously seen, we can intelligently use Tshark to investigate security incidents whose origin is unknown. In this article by Borja Merino, author of Traffic Analysis with Tshark How-to, we will discuss a couple of examples, data exfiltration by a malicious user and an internal network intrusion.Read Analyzing network forensic data (Become an expert) in full
This article by Ken Lim, author of Instant Rainmeter Desktop Customization Tool How-to, explains the method of customizing your Windows desktop wallpaper with a live cityscape for different CPU processes. The article, will guide you through the ways to customize your Windows desktop wallpaper using Rainmeter.Read Building a bar graph cityscape in full
In this article by Unmesh Gundecha, author of Instant Selenium Testing Tools Starter, we will show you how to record a test using Selenium IDE. During the recording, we will add some additional commands to the test and run the recorded test.
A test is a basic building block in Selenium IDE. It contains commands for navigation, test steps, and checks for expected versus the actual state of the application. In this article we will show you how to create your first test and execute this test with Selenium IDE.Read Quick Start into Selenium Tests in full
NumPy has a number of modules that have been inherited from its predecessor, Numeric. Some of these packages have a SciPy counterpart, which may have fuller functionality. The numpy.dual package contains functions that are defined both in NumPy and SciPy. The packages discussed in this article are also part of the numpy.dual package.
In this article by Ivan Idris from the book NumPy Beginner’s Guide - Second Edition, we shall cover the following topics:
- The linalg package
- The fft package
- Random numbers
- Continuous and discrete distributions
This article by Joseph Howse, author of OpenCV Computer Vision with Python introduces some of OpenCV's tracking functionality, along with the data files that define particular types of trackable objects. Specifically, we look at Haar cascade classifiers, which analyze contrast between adjacent image regions to determine whether or not a given image or subimage matches a known type. We consider how to combine multiple Haar cascade classifiers in a hierarchy, such that one classifier identifies a parent region (for our purposes, a face) and other classifiers identify child regions (eyes, nose, and mouth).
We also take a detour into the humble but important subject of rectangles. By drawing, copying, and resizing rectangular image regions, we can perform simple manipulations on image regions that we are tracking.
By the end of this article, we will integrate face tracking and rectangle manipulations into Cameo. Finally, we'll have some face-to-face interaction!
All the finished code for this article can be downloaded from my website: http://nummist.com/opencv/3923_04.zip.Read Tracking Faces with Haar Cascades in full
In this article by Alessio Di Lorenzo and Giovanni Allegri, the authors of the book Instant OpenLayers Starter, we will discuss some basic points about OpenLayers
In this article by Rachel McCollin,authors of WordPress Theme Development - Beginner's Guide we'll look at some added extras, some additional bells and whistles you can use to make your theme just that bit better.
You'll learn how to create and make use of additional template files to add extra flexibility and functionality to your theme, as well as how to use conditional tags to display different content in different parts of your site. You'll also learn how to make use of the Theme Customizer and optimize your site for SEO.
You can create perfectly good, workable WordPress themes without any of these extras, but you'll find that you can take your WordPress themes much further with these techniques.
So let's get going!Read Tips and Tricks in full