iPhone App - Catalogue with Photo Recognition Feature

Hello all, I'd like an application developing suitable for use mainly on the iPhone / iPad and other platforms such as Android where possible (I'm open for discussion with this). I want the APP to work as a parts identifier, and I think it would be best as follows: The online database would consist of all the parts available with a high quality photo (or whatever is needed to make the photo identification work). When the app user takes a picture of a part on their phone, it will search the database and return details of the correct part (name, price, variations, notes and link to buy). Once you have set the database up, I am happy to upload all of the relevant information. Where a match isn't made it will offer the user the option to send the photo and their name, phone number to an email address where it can be manually identified. For now, that is all I would like to the app. But I would like it to be built in an expandable fashion i.e. it can be added to and built on later. I know amazon use a similar photo recognition service with their app. Please let me have your ideas, bids, previous app building experience, and turnaround time. Thank you