In reality, though, the problem only gets slightly more different. Addresses are relatively uniform, and easy to Regexp (especially if you do not care for a few

In reality, though, the problem only gets slightly more different. Addresses are relatively uniform, and easy to Regexp (especially if you do not care for a few false positives). That being said: No, you cannot just hide the address in an image - that would be illegal (the imprint information needs to be "easily parseable").