Not to burst your bubble, but in my area I have seen a lot of security camera shots on the news, and few if any arrests based on them, whether a bank or whatever... the commonality is that usually the crime involves armed robbery.

So, basically, if you get a good picture, the chances of getting the police, or local tv stations to take the theft seriously would be the next step after getting the good shot. That is likely to be hard if you try to convince them of the public good for finding the person who stole your bicycle from an open garage.

I had someone break-in to my car in order to steal some of the contents. My window was smashed out to gain entry. This was several years ago, but I couldn't even get the police to show up.

Compared to locking up your bicycle(s), a camera is utterly useless. It doesn't ensure that there will be no theft, but the protection provided by locking your garage is orders of magnitude better than a camera. My guess is that the main difference a camera will make in a case like yours is that the thieves will potentially get your bicycle and a bonus camera.