Flickering is a common problem in time-lapse or stop motion footage captured
with a digital still camera. Frame by frame variations in lighting or exposure
lead to perceptible brightness fluctuations, or flicker.
Last year I wrote a plug-in for Adobe After Effects and Premiere that I call GBDeflicker. It removes flicker from video clips. GBDeflicker has been working well for me, so I decided to make a product out of it and have released a beta version for download from my site (granitebaysoftware.com).
This short video explains a bit about it and how it works.