Category: Imaging

DES in Electronic Code Book (ECB) mode is a particularly poor choice of cryptography for image files. This is because ECB mode implements a look up table between the unencrypted value and the encrypted value. This results in a known input value turning into the same output value over and over. This can have some…

Imagine that you are drawing a triangle across an image (or on the screen for that matter). The triangle is sometimes going to cross pixels in a way which makes them not totally turned on. Have a look at the figure below to see what I mean… If we only have a black and white…

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…

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,…