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Biometric points
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<p>In order to identify a person, a <a href="/facts/Security/B4uxkyxh">security</a> system has to compare personal characteristics with a <a href="/facts/Database/VYcpkevb">database</a>. A scan of a person's iris, <a href="/facts/Fingerprint/5WLcd20T">fingerprint</a>, face, or other distinguishing feature is created, and a series of biometric points are drawn at key locations in the scan. For example, in the case of a facial scan, biometric points might be placed at the tip of each ear lobe and in the corners of both eyes. Measurements taken between all the (possibly hundreds of) points of a scan are compiled and result in a numerical "score" (which can be quite large). This score is unique for every individual, but it can quickly and easily be compared to any compiled scores of the facial scans in the database to determine if there is a match. </p>