ImageMagick and RMagick for Testing Colors
A couple weeks ago I started working on a pure-Ruby GPIO library for the Raspberry Pi to see whether I could get rid of a persistent glitch I was experiencing while driving the ShiftBrite LED modules. I still haven’t been able to pinpoint the issue but while I was at it I put together some color conversion classes. Since I couldn’t test the libraries on the LED modules directly, I needed a simple way to check that the conversion worked beyond the numbers looking OK and matching up with a few test cases from Photoshop. ...