I am with James and Harald. You have nothing to lose and it's about the money. These are two of your most important commodities: freedom and money. If the camera maker wants to tie you up exclusively, that's a very different deal than if they want a license to use the product. My guess is you expected such an offer and you don't yet know what you want. You might dream of being the world's leading facial recognition software (the Intel or Synaptics in a billion dollar niche) but the first embedded deal pops up (like it should) and it worries you that might be swallowed up for a few million dollars. Money in hand versus a decade of hard work and risk ahead. That's why the advice from others here is so important. Like James says, it's about the money. Make the money in front of you...don't drop what you are doing in a long protracted negotiation...focus on the money you want from the camera maker and make the deal clear and swift. If, as Harald says, they want to hug you so much that they want to marry you, know your price. But always march forward and never stand still (or get pinned down) when these route-changing decisions pop up. They must be dealt with as parallel universes until they become reality.
If you have one camera maker ready to do this, there are others. Which begs the question: which camera maker would make the ultimate marriage--for your dreams as well as your wallet? This one might just be a customer. Nothing wrong with that.