Question

Which of the following is the point at which two error rates of a biometric system are equal and is the measure of the system's accuracy expressed as a percentage?

a) Equalization Point
b) Crossover Point
c) Calibration Point
d) Accuracy Threshold

Answer 1

The correct answer is the Crossover Point, which represents the rate where the false acceptance and false rejection rates of a biometric system are equal and is used to measure the overall accuracy of the system as a percentage.

Step-by-step explanation:

The point at which two error rates of a biometric system are equal is known as the Crossover Point. This term refers to the rate at which false acceptance rate (FAR) and false rejection rate (FRR) intersect, providing a balance between the two types of errors. The Crossover Point is also a measure of the system's accuracy expressed as a percentage. In a biometric system, maintaining an optimal balance between security and convenience is critical, and the Crossover Point serves as an important benchmark for comparing the accuracy of different systems.

Simply put, if a biometric system's accuracy is perfect, there would be no false acceptances or rejections, and the Crossover Point would theoretically be at 0%. However, all practical biometric systems will have some level of error, hence the Crossover Point often serves as an indicator of how well the system performs under normal operating conditions.

Answer 2

The point at which two error rates of a biometric system are equal, expressing the system's accuracy as a percentage, is known as the Crossover Point. Option B is the answer.

Step-by-step explanation:

The Crossover Point in a biometric system is the threshold where the False Acceptance Rate (FAR) and False Rejection Rate (FRR) intersect or become equal. FAR represents the rate at which the system incorrectly accepts unauthorized users, while FRR indicates the rate at which the system incorrectly rejects authorized users.

The Crossover Point is crucial as it helps determine the optimal balance between these two error rates, influencing the overall accuracy of the biometric system. Options A, C, and D are not accurate descriptions of this specific point in biometric system evaluation.

Option B is the answer.