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INTRODUCTION Imagine going on a trip with friends and all of you take photos of the same event from many different cameras? Your friends may have some pictures of you that you could not take. To make sharing of the pictures easy, last year, Facebook launched a photosharing app called Moments in some countries It automatically groups together photos featuring the same friend or friends and then makes it easy to share the pictures with others who have installed the same app. So how does Facebook recognize a face from the many millions of faces in pictures? The technology is generally called 'facial recognition.

WHAT IS BIOMETRICS? Usually people don’t remember the moments when they have met a person in the street. A brief glance at the face is enough for you to remember that person in a different time and place. Each human face has approximately 80 nodal points. When we see a face, our brains act as a scanner and a few important characteristics get fixed in our minds and are stored away subconsciously. The brain reconstructs the face again by bringing back the stored data. What exactly are these nodal points or characteristics? It is the distance between the eyes, width of the nose, depth of the eye sockets, shape of the cheekbones, length of the jaw line, etc. The fact is that our physical characteristics form in slightly different ways from every other person. Nodal points can be scanned and measured by a computer. Sophisticated software generates numerical codes or faceprints from this data and quickly matches them against large databases.

OPPORTUNITIES AND DRAWBACKS Facial recognition works similar to fingerprinting or DNA matching. But unlike them, facial recognition has far more immense possibilities. Besides being 'contact-less', people can be classified by their age, gender and ethnicity from a photo or digital image. Think of the amazing possibilities in security, marketing and other areas. But no technology is without its drawback. Many fear that a 'contact-less' technology like facial recognition is very intrusive, violates privacy and can be misused. Your picture can be taken without your consent! With security cameras everywhere, the threat of profiling people using this technology is very real. However, the sheer potential of the technology is spurring many innovative uses. Facebook is using just this technology to automatically tag uploaded photos on their server.


Facebook moments3  

In this ebook we talk about facebook moments and how it works

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