Designer QR Codes

Angry Birds QR code [image: Visualead]

In the article Color QR Codes Done Right, I’ve tried to convince you to create your color QR codes in a way that keeps them easily scannable. This week, I’ve discovered Visualead, a startup that is currently in Public Beta, that lets you combine any artwork with a QR code. Graphically, they have nailed it. They seem to have found out that… read more


Submitted on 12 October 2012

To the Guys that Stole My Car

To the guys that stole my car: I feel that your action was suboptimal with respect to building a better society. Also, breaking open a locker while a guy is in the swimming pool is not generally considered a nice thing to do. I do agree with your point of view that… read more


Submitted on 4 October 2012

The Spectacular Landing of Curiosity

Curiosity descent [image: NASA/JPL-Caltech]

Quite a while ago, I briefly reported on the spectacular Mars Science Laboratory mission that is currently under way. As you are probably aware, the Curiosity rover has now safely landed, and is already exploring the Red Planet. In this article, I want to tell you about the spectacular way in which the rover was put down on the surface. For previous Mars rovers like… read more


Submitted on 17 September 2012


Lena test image

There are two kinds of people in the world. The first have seen the Lena (or Lenna) image before; most of them have done at least some work in image processing, or happen to have read the November 1972 issue of Playboy magazine. The second have probably never seen it. read more

Submitted on 30 August 2012

Fractal Dimension

The concept of a fractal dimension is based on the idea of measuring things with differently sized rulers, as already mentioned in the article on the Mandelbrot Mandelbrot set. Mathematically (but very loosely), the fractal dimension is defined as: if I cover an object with… read more

Submitted on 17 June 2012

Mandelbrot Set

Detail of the Mandelbrot set

The Mandelbrot set is named after Benoît Mandelbrot, a French American mathematician. The set is a part of the complex plane. It is created by iterating the complex quadratic polynomial \(f_c(z)=z^2+c\). For each point \(c\) of the complex plane… read more

Submitted on 17 May 2012


Detail of the Mandelbrot set When I was writing an article on the Mandelbrot set, I looked for software to generate illustrations. Needless to say that there is lots of stuff available for a colorful subject like that. But, lo and behold, I discovered that the venerable Fractint still exists, and is actually still maintained! The program…


Submitted on 1 May 2012


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