the issue here is trust, and a violation of trust. It must be a stressful and miserable life to live with someone whom you cannot trust to respect your boundaries and your decisions about your own body. And his responses to you enforces that point - he doesn't even think he did anything wrong. Which means he will likely continue to do so.This is psychological domestic violence and invasion of privacy. you should warn him that you will file a police report the next time he does this without your permission.
I don’t think you’re being unreasonable. Personally, it wouldn’t bother me but I get upset when my husband takes pics of me in my PJs or when I’m cleaning around the house and look messy so I totally understand not t wanting a picture of you being taken all the time. He may find it funny or thinks he is complimenting you somehow by doing this.