You can look at some other recent threads detailing copy protection (TZ), but there is a basic problem.
What are you going to do with the images?
It is impossible to protect a raw directory of standard files, if you can see them, you can copy them.
Now if you have some smart software you wrote, that can open the files by LBA, then you can destroy the directory entries, and use other dirty tricks to prevent a full copy.
Making it hard to copy is one side of it, but no use if you can just strip the bits you want!