If you have only changed the black and white photos belonging to someone else into colored photos, your colored photos will likely be considered a derivative work. The copyright of a derivative work is owned by the owner of the original work. Therefore, the original owner can limit how you use those works. Your use of such works without their permission (a license) may constitute copyright infringement.
This information should not be considered legal advice for your specific circumstances and are offered only as general information on the topic of your question. This should not be relied upon as legal advice and Sills Cummis and Gross does not represent you until you have signed a retainer letter from us.
Philip Braginsky
Sills Cummis and Gross
http://www.sillscummis.com/practice/practice_group.asp?id=28
Answered on Oct 31st, 2011 at 1:23 PM