See recent comments. RSS feed of all comments. Raw dump of all comments for research purposes.
ImageMagick book
MythTV book
|
 |
|
 |
|
Fri, 04 Feb 2005
|
|
|
|
|
|
|
|
|
Wed, 02 Feb 2005
|
|
|
|
|
 |
|
 |
|
|
|
|
|
|
|
|
|
|
There are some things which I assume you know, and which are outside the scope of this tutorial.
C
This tutorial discusses code. Almost all of the code discussed is written in C. It is therefore safe to assume that if you don't have a good working knowledge of C, then you're likely to get a lot less out of this tutorial as those who do know some C. On the other hand, don't worry about the more esoteric syntax, I'll explain this as we need it.
It should also be noted that the code samples in this tutorial are not optimal. They have been written to be as readable as possible, and not necessarily the most efficient possible. Please bear this in mind before blindly copying them.
How to compile and link on your chosen operating system
It is outside the scope of this document to teach you how to compile and link source code into an executable form on your chosen architecture and operating system. You will need to understand this before you will be able to use any of the code in this document.
For those of you using gcc on a Unix (or Unix-like) operating system, then the following points might be all you need to know. If you need more information, then a http://www.google.com search will serve you well.
- Libraries are added to the link command using the -l command line option. For instance, to compile and link the source file foo, with the tiff library, you would use a command line along the lines of gcc foo.c -o foo -ltiff -lm.
- You need to include -lm almost always. When you compile a c program using gcc without specifying any libraries, you get a -lm for free. As soon as you start specifying any libraries (for instance in this case -ltiff), then you also need to explicitly specify the math library as well.
- You will almost certainly also need to add the library and include paths for the installed version of the relevant library to the compile command line as well. Directories are added to the library search path using the -L command line option. Include directories are added with the -I option.
- The make files included with the samples in this tutorial a probably a bad place to look for introductory compile examples, as they use automake and autoconf to try to detect where the various required libraries are installed...
Technorati tags for this post: imaging tutorial
posted at: 21:05 | path: /imaging | permanent link to this entry
|
|
|
|
|
|
|
|
|
I don't view myself as an author -- I'm a programmer. I have however written a few articles and conference papers in my time. Here are the ones relevant to this topic area:
- September 2001: Australian Unix User's Group Annual Conference Proceedings, Open Source PDF handling with Panda and PandaLex (not online at the moment, but I intend to fix that sometime soon)
- March 2002: IBM Developer Works, Graphics programming with libtiff: Black and White
- June 2002: IBM Developer Works, Graphics programming with libtiff: gray scale and color images
- July 2003: IBM Developer Works, Graphics from the command line: Flip, size, rotate, and more with ImageMagick (this item was subsequently linked to and discussed on Slashdot, Linux Weekly News, Linux Today, LinuxDevices.com, Linux.com / OSDN, linux.box.sk, and many other sites)
- August 2003: Linmagau, JPEG to MPEG conversion howto
- March 2004: IBM Developer Works, More graphics from the command line
I've also written a bunch of imaging software, including lots that uses libtiff, some libpng tools, and my own PDF generation library. They're all open source, and available at at this site.
Back in 2002 I put a fair bit of effort into writing up an imaging tutorial for the annual AUUG conference. The tutorial was subsequently cancelled as not enough people enrolled, but by then I had written the documentation. I talked about getting a publisher for the work, even as recently as a couple of months ago. I'm not convinced that I have the time to polish and update the manuscript to the point that it's ready for publication though.
Here's what I said at the time that I first wrote the manuscript:
"This document is the manual associated with my tutorial on imaging programming presented at the Australian Unix User's Group 2002 Winter Conference in Melbourne Australia. It is intended to serve as the basis for discussions during this day long tutorial, as well as being a reference for the attendees once they return to their every day lives."
So here's what I propose to do. I'll write a book in this topic on my blog, and in return I would like people who read it and have comments to let me know. Together perhaps we can come up with something which is ready for real publication. If you're a publisher, and would like to play this game too, then feel free to let me know...
I can be contacted, as ever, at mikal@stillhq.com.
Boring stuff
All of this work is Copyright (c) Michael Still, 2002, 2003, 2004, and 2005. It remains copyright me, and republication of this content elsewhere without my permission is expressly not allowed. Feel free to quote and deep link and stuff, and please please comment, but don't steal my content. Portions of this content were first published by the kind folk at IBM DeveloperWorks and they deserve heaps of credit for giving me a go.
Technorati tags for this post: imaging tutorial
posted at: 21:04 | path: /imaging | permanent link to this entry
|
|
|
|
|
|
