There is often confusion as to who owns copyright of a photographic image - particularly if that image is taken as part of a commercial contract.
The rights of freelance photographers (as opposed to those on the payroll of a company) are quite specific and are outlined in many documents.
The extract below is a clear and concise explanation.
While I have no wish to abuse such rights - and invariably offer the right of veto on photographs of people - I do have the right to use for my own promotional pruposes photographs which I've taken.
Andy