This playground demonstrates some uses of Apple's CoreImage framework, particularly filters and transforms. Some of the UIImage extensions contained here are the base for functionality in my Sticker Lab app.

I'm using a picture of my chocloate lab, Chip, and giving the option to apply a couple of color filters and distortion filters by selecting them in segmented controls. For the distortion filters, pixellate and bump distortion, a series of frames are created and animated to show the effect over time.

Sticker Lab takes this a step further, creating animated gifs and converting them to stickers to share via iMessage.