The implementation of GPU can be done with CUDA C. Due to its highly parallel structure it is used in a number of real time applications like image processing, computational fluid mechanics ...

But the logic to convert gesture to control signals is all Vectron, and uses a k -nearest neighbor algorithm executed in 6502 assembly.

Scientists in Iraq used a k-Nearest Neighbors algorithm to evaluate the operational status of PV modules under various conditions, including partial shading, open circuit, and short circuit ...

Which is your favorite Machine Learning algorithm? This question was originally answered on Quora by Carlos Guestrin.