If you give a face a name, it will identify other similar faces and suggest that they are the same person. The software if powerful enough to identify blurred, grainy faces as well as in-focus portraits. Set it loose on your photos and it will recognise faces within them. Like those other programmes, Picasa has a powerful facial recognition feature. This was the feature that prompted me to move my photo management into Picasa from Apple’s iPhoto (now discontinued) and why I have not moved on to its new ‘Photos’ offering. In particular, it allows management of photos without making a copy of each photograph inside the application. It appears to be an experimental project rather than a flagship product, but its extremely useful and versatile. Picasa is Google’s free photo management application.
