Photo Recognition Search Engine App - repost

Hello, I would like to create an iPhone app where user can take a photo and highlight / tag a part of the photo, click search and it look it up against a database of similar images whereby user is presented with a list of qualified matches to click through for more information such as where to buy, etc.. This technology should work similar to Faces in iPhoto that is able to go through various photos and match photos with similar faces. Social Media integration, and behavioural analytics will be a key component. Please contact me if you have experience in app development, search engine development as well as photo recognition software development. Intelligent questions will result in receiving more detailed specification. Thanks, Jason