While this tool isn't new, in the original release you could only confirm or reject iPhoto's guesses. This view allows you to simply click once or twice on each photo to indicate whether these guesses actually are that person, making it easy to quickly identify someone and train iPhoto to recognize the person better. iPhoto won't display the photos you've tagged, but its guesses about photos that may contain that person. One of the best ways to train Faces to recognize people is to first tag a good sample of each person and then look at the Faces list for them. This allows the application to learn from the faces you've added - a powerful addition, both in terms of recognizing faces in general and in learning who people are in your library. Now, when you manually add a missing face in a photo, Faces will rescan just the contents of the box that you draw around that person's face using less stringent guidelines than the default. With this update, Apple has extended this option. (Even with the new-and-improved rescanning option, there will be times when it still fails to identify a face.) While this allows you to tag people's faces with their names, in the original release of Faces, it didn't help iPhoto recognize that person in other photos. This option allows you to draw a box around a person's face and tag them when Faces doesn't recognize them. In addition to rescanning for missing faces, the original option of manually adding a missing face is still available.
#IPHOTO UPDATE FOR MAC SOFTWARE#
In a similar vein, if iPhoto initially identified something as a face - and you used the "x" icon in the face box to tell the software that the object was not actually a face - rescanning those photos for missing faces takes you back to square one: iPhoto will re-identify the objects as faces. Doing so, however, doesn't adjust the algorithm used to scan your entire library, which could result in extra hits of nonface objects being accidentally detected as faces. One important point is that this feature works on a photo-by-photo basis, meaning that you can use it when a face is not recognized. There were easily dozens, if not hundreds, of photos in my iPhoto library where one or more faces weren't recognized when I first tried out iPhoto. The result is that Faces will be more likely to detect, well, faces. In this update, a contextual menu item (available by right-clicking or control-clicking) on a photo allows you to tell iPhoto to rescan the picture and detect missing faces, being less stringent with its recognition algorithm. This was particularly common in photos where someone's face is turned to one side or was shot in low light, or in slightly blurry photos. One of the problems with Faces in its initial release is that it occasionally wouldn't recognize a person's face as a face.
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