I'm not familiar with it, but as a separate graphics library, I'd have to guess it's not going to be easy to work with both PIXI and Processing.
Still just to be on the safe side I think it'd probably be best if I could directly 'tinker' is there anywhere I could perhaps find out more about Pixi?Well Pixi is just the backend, you won't really have to worry too much about working with it directly. MV gives classes for sprites and stuff to make images appear on the the screen, and there are filters available to change their appearance in real-time, but I'm not familiar with processing enough to know what kind of features it has for image manipulation.
ok thanks for the link.Processing.js is an overall framework/engine, while Pixi is just the renderer. You'll be doing a lot more than shimming out Pixi.
You on can read up on Pixi here.