Weekly roundup: computer vision

I still have an exam to pass after my first semester in the master's program. It is the exam of computer vision, which consists of a project - in my case, automated detection of traffic infraction.
My goal is, given a video of an urban intersection and some configuration of the scene parameters, to detect vehicles that do not respect priority. I'm more or less correctly tracking the vehicles, but the challenge now is to rectify the scene in real world coordinates (meters instead of pixels):

The project is all TDDed, and it is hosted on Github, just for backup's sake. So this is an example of what you can do at PoliMi, computer engineering's program.

Here are my original articles published this week.
Practical PHP Testing Patterns: Test-Specific Subclass goings on in the Practical PHP Testing Patterns series.
Struts vs. Zend Framework compares an old-style Java framework such as Struts 1 to Zend Framework 1.x.
What Firefox 4 means to web developers? is a light analysis of what features new browsers are providing us.
The PHP frameworks poll results presents the results of the recent popularity survey on Web Builder Zone.