As someone who just transitioned from university to a pretty much unrelated programming job, it occurs to me that I could have gone into either web development

As someone who just transitioned from university to a pretty much unrelated programming job, it occurs to me that I could have gone into either web development or computer vision, to use your example. Either way I would have been joining a team as a junior developer with only hobbyist experience and expected to learn on the job. Perhaps if you lowered your salary expectations and were willing to accept a relatively junior level role you would be able to break into that area of work, and with your existing experience would be able to work your way up more quickly than a truly junior dev like myself.