Check out the full article here:"I would like to "formally" announce two open source projects related to optical flow / programmable vision sensors. These are based on some of the optical flow techniques developed at Centeye, but in the spirit of "open source" are meant to be hacked/modified/copied any way a user deems fit. In both cases, the source code has been opened up under a modified FreeBSD license, while the board design has been released under a Creative Commons Attribution-ShareAlike license"
http://bit.ly/OpticalFlowXMOS