On last post template and Matching are wrote.
All biometric systems consist of three basic elements:
Templates, or the data representing the enrollee’s biometric.
Matching, or the process of comparing a live biometric sample against one or many templates in the system’s database.
Enrollment, or the process of collecting biometric samples from an individual, known as the enrollee, and the subsequent generation of his template.
Enrollment
Enrollment is the crucial first stage for biometric authentication because enrollment generates a template that will be used for all subsequent matching. Typically, the device takes three samples of the same biometric and averages them to produce an enrollment template. Enrollment is complicated by the dependence of the performance of many biometric systems on the users’ familiarity with the biometric device because enrollment is usually the first time the user is exposed to the device. Environmental conditions also affect enrollment. Enrollment should take place under conditions similar to those expected during the routine matching process. For example, if voice verification is used in an environment where there is background noise, the system’s ability to match voices to enrolled templates depends on capturing these templates in the same environment. In addition to user and environmental issues, biometrics themselves change over time. Many biometric systems account for these changes by continuously averaging. Templates are averaged and updated each time the user attempts authentication.
All biometric systems consist of three basic elements:
Templates, or the data representing the enrollee’s biometric.
Matching, or the process of comparing a live biometric sample against one or many templates in the system’s database.
Enrollment, or the process of collecting biometric samples from an individual, known as the enrollee, and the subsequent generation of his template.
Enrollment
Enrollment is the crucial first stage for biometric authentication because enrollment generates a template that will be used for all subsequent matching. Typically, the device takes three samples of the same biometric and averages them to produce an enrollment template. Enrollment is complicated by the dependence of the performance of many biometric systems on the users’ familiarity with the biometric device because enrollment is usually the first time the user is exposed to the device. Environmental conditions also affect enrollment. Enrollment should take place under conditions similar to those expected during the routine matching process. For example, if voice verification is used in an environment where there is background noise, the system’s ability to match voices to enrolled templates depends on capturing these templates in the same environment. In addition to user and environmental issues, biometrics themselves change over time. Many biometric systems account for these changes by continuously averaging. Templates are averaged and updated each time the user attempts authentication.
