The best avenue for funding would likely be Kickstarter, but that presumes that the idea of a gesture-reading device is likely to have broad-enough appeal, which I'm not sure of based on the one line description.

When I think about reading gestures, I think about a market primarily aimed at people with vision impairments. If that's the case, you might even want to look at foundations or organizations who might fund some of the research, but that will almost inevitably slow your pace of innovation.

You might want to setup a call with Clay Hebert if you decide to go the Kickstarter route. https://clarity.fm/clayhebert

Best of luck. Curious to hear more.