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The biometric device involves users placing their finger on a platen for the print to be electronically read. The fingerprint biometric is an automated digital version of the old inkand-paper method used for more than a century for identification, primarily by law enforcement agencies. government’s intelligence community, which continue to work on improving reliability. This technology has been the focus of considerable efforts on the part of the telecommunications industry and the U.S. However, voice recognition can be affected by environmental factors such as background noise. A telephone or microphone can serve as a sensor, which makes it a relatively cheap and easily deployable technology. Voice or speaker recognition uses vocal characteristics to identify individuals using a pass-phrase. Stores, criminals and terrorists in urban areas. For this reason, facial recognition has been used in projects to identify card counters or other undesirables in casinos, shoplifters in the subject does not necessarily know he has been observed).
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Because a person’s face can be captured by a camera from some distance away, facial recognition has a clandestine or covert capability (i.e. Different vendors use different methods of facial recognition, however, all focus on measures of key features of the face. Because users perceive the technology to be somewhat intrusive, retinal scanning has not gained popularity Ĭurrently retinal scanning devices are not commercially available.įacial recognition records the spatial geometry of distinguishing features of the face. The device involves a light source shined into the eye of a user who must be standing very still within inches of the device. Retinal scans measure the blood vessel patterns in the back of the eye.
Face recognition time attendance verification#
Iris scanning can be used quickly for both identification and verification applications because the iris is highly distinctive and robust. As a result, the iris patterns in a person’s left and right eyes are different, and so are the iris patterns of identical twins. Iris scanning measures the iris pattern in the colored part of the eye, although the iris color has nothing to do with the biometric. How the facial recognition system should behave based on security andīiometric technologies may seem exotic, but their use is becoming increasingly common, and in 2001 MIT Technology Review named biometrics as one of the “top ten emerging technologies that will change the world.” While this briefing focuses on facial recognition, there are many different types of biometrics as Leonardo DaVinci’s Vitruvian Man makes clear. Match are often configurable by the end user, so that he or she can determine The final step is determining whether any scores produced in step four are Is only compared with one template in the database – that of the claimedĥ. In a verification application, the generated template Yields scores that indicate how closely the generated template matches each In an identification application, this process The fourth step is to compare the template generated in step three with those Note that because the systems use spatial geometry of distinguishing facialįeatures, they do not use hairstyle, facial hair, or other similar factors.Ĥ. That represents the unique features of an enrollee’s face. Result of the feature extraction process. PCA has also been combined with neural networks and local featureĪnalysis in efforts to enhance its performance. The most popular method is called PrincipleĬomponents Analysis (PCA), which is commonly referred to as the eigenface
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To extract the identifying features of a face. Noted in slide three, facial recognition analyzes the spatial geometry ofĭistinguishing features of the face.
Face recognition time attendance software#
Once the facial detection software has targeted a face, it can be analyzed.
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This task is difficult, and often generalized patterns of whatĪ face “looks like” (two eyes and a mouth set in an oval shape) are employedģ. Second, software is employed to detect the location of any faces in theĪcquired image. Individual still images, it can also be used as a source of facial images.Ģ. This acquisition can be accomplishedīy digitally scanning an existing photograph or by using an electro-opticalĬamera to acquire a live picture of a subject.