In these new blogs, we will be focusing upon the differing Biometric Technologies which are available today. This is in anticipation of the launch of our much anticipated Infographic Newsletter which will take place in the last week of March. So, let us start with the most widely used Biometric of all, and also one of the oldest: Fingerprint Recognition.
The Science Behind Fingerprint Recognition
The first step in fingerprint recognition is known as “image acquisition”. In this part of the process, a user places his or her finger on a platen (also referred to as a scanner), which is located on the top of most fingerprint recognition devices.
Numerous images of the fingerprint are then captured. It should be noted that during this stage, the goal is to capture images of the center of the fingerprint, which contains many of the unique features. All of the captured images are then converted into black and white images.
The second step in fingerprint recognition is the location and determination of unique characteristics of the processed fingerprint image. The fingerprint is composed of various “ridges” and “valleys” which form the basis for the loops, arches, and swirls that you can easily see on your fingertip.
The ridges and valleys contain different kinds of breaks and discontinuities. These are called “minutiae”, and it is from these “minutiae” that the unique features are located and determined. There are two types of “minutiae”: (1) Ridge endings (the location where the ridge actually ends); and (2) Bifurcations (the location where a single ridge becomes two ridges).
Stay tuned for the next two steps tomorrow!!!