Book Image

ImageMagick Tricks

By : Sohail Salehi
Book Image

ImageMagick Tricks

By: Sohail Salehi

Overview of this book

<p>The book is packed with interesting and fun examples. We had a lot of fun coming up with cool ways to demonstrate ImageMagick's power, and we're sure you'll have fun learning how to create them.<br /><br />Although the printed book is in black and white, there is a full colour PDF of the screenshots freely available that includes all of the images in the book. Use it to see exactly what the ImageMagick effects look like in colour, or browse through it and see just what you'll learn to do with this book.<br /><br />ImageMagick is a free software suite to create, edit, and compose bitmap images using text-based commands. The commands can be issued from the command line, but more often will be included in web or desktop applications &acirc;&euro;&ldquo; carrying out complex image-manipulation tasks in response to the user's input.<br /><br />ImageMagick is a popular way for generating images on-the-fly in web pages, whether it's generating thumbnails from a large image, or creating complex combinations of images, text, and effects chosen by a visitor or the web site's creator.</p>
Table of Contents (18 chapters)
ImageMagick Tricks
Credits
About the Author
About the Reviewers
Preface
5
Identify, Display, and Import
Index

Identify


Identify is one of the special utilities in ImageMagick because, unlike other utilities, it works on image characteristics and specifications. There is a lot of helpful information that identify can retrieve from an image and display at the command line.

Beside image characteristics it can find out if an image is corrupted and report it. Moreover there is an option named -list (which can be found in other utilities as well) that helps us to find out more information about the ImageMagick software installed on our machine.

Identify Syntax and Options

For running identify use the following scheme:

identify [options ...] image[ [options ...] file ... ]

The simplest way to get a list of identify options is typing identify at the command line (without any parameters):

-authenticate value decrypt image with this password
-channel type apply option to select image channels
-crop geometry cut out a rectangular region of the image
-debug events display copious debugging information
-define...