If you are building an image sharing service or a social network mashup, it's likely that you will want to incorporate face-tagging in your images. Maybe you'd like to go a step further and automatically detect faces in an image, similar to Apple's iPhoto. A Romanian developer has developed an API to help detect faces in images and return the box coordinates so that you can build any kind of app you want.
Ocutag, a division of Ricoh Innovations, aims to help apps deliver content to users taking photos. Their aim is to herald a new model of retail. App designers upload images and tag them with information. When users snap pics of the same thing in reality, information can be delivered through the app, such as that appearing in the graphic of the scarf below: where to buy it, details about it, local stores that carry it. What information is delivered is up to the company with the app. The company provides the Ocutag API for integration.
Creating a photograph that gives life to its subject is hard. Once you have done that, proofing and selling your photos should be easy. ShootProof is trying to simplify photography post-production. ShootProof is a web based service that allows photographers to upload, organize, share, and sell photography online. The read/write ShootProof API provides developers access to many of the site's features, including uploading new photos.