A few weeks ago, I started playing around with Picasa to create a photo album. I let it import all of the photos on my computer (approximately 10,000 photos taken over a six or seven year period) and then started looking through all of them. While messing around, I decided to turn on the facial recognition feature and was absolutely amazed at how well Picasa was able to detect faces.
Out of all of the photographs on my computer, the overwhelming majority of which contain multiple faces, Picasa only identified a small handful of items that weren’t actually faces. Then, when I started assigning names to the faces that had been identified, I was flabbergasted at how accurately Picasa was able to identify the same person’s face in other photographs. Within minutes, I had nearly 5,000 faces identified and labeled within my Picasa installation.