Convolution is one of the fundamental concepts of image processing (and more generally, signal processing). For the scikit-image tutorial at Scipy 2014, I created an IPython widget to help visualize convolution. This post explains that widget in more detail.

Only a small portion of this post is actually about using ...

This article demonstrates matplotlib's animation module by animating marker particles in a fluid flow around a cylinder. It's a bit long because it ties together a number of different ideas:

• stream functions
• numerical integration
• plotting and animation

Before we really start, let's copy a function from a ...