What is an equal error rate?

What is an equal error rate?

As an indicator of Biometric Performance, an ERR(Equal Error Rate) is a point where FAR (False Acceptance Rate) and FRR (False Rejection Rate) intersects. A device with lower EER is regarded to be more accurate.

What is half total error rate?

rejection, and Cost(FA) is the cost of a false acceptance. A particular case of the DCF is known as the half total. error rate (HTER) where the costs are equal to 1 and the. probabilities are 0.5 each: HTER =

What is crossover error rate?

The crossover error rate describes the point where the false reject rate (FRR) and false accept rate (FAR) are equal. CER is also known as the equal error rate (EER). The crossover error rate describes the overall accuracy of a biometric system.

How is EER far FRR calculated?

1 Answer

1. EER=FAR+FRR2 with those single FAR and FRR values that minimize abs(FAR-FRR) . In your case: 0.5+0.42=0.45.
2. Using the line between the FAR and FRR values directly before and after FAR==FRR (in your case: the line between FAR1=0.5 , FRR1=0.4 , and FPR2=0.2 , FRR2=0.6 ).

What is Character error rate?

The Character Error Rate (CER) compares, for a given page, the total number of characters (n), including spaces, to the minimum number of insertions (i), substitutions (s) and deletions (d) of characters that are required to obtain the Ground Truth result.

How is biometric accuracy measured?

Accuracy of biometric systems Three metrics are used to judge biometric accuracy: the false reject rate (FRR), the false accept rate (FAR), and the crossover error rate (CER).

How to find the equal error rate ( EER )?

1.1) The idea of EER is try to measure the system performance against another system (the lower the better) by finding the equal (if not equal then at least nearly equal or have the min distance) between False Alarm Rate (FAR) and False Reject Rate (FRR, or missing rate) .

How does a biometric security system work EER or far?

One way to summarize the operating characteristics of a biometric security system is to look at the Crossover Error Rate (CER), also known as the Equal Error Rate ( EER ). The system has parameters that can be tuned to adjust the FAR and FRR. Adjust these to the point where the FAR and FRR are equal.

What is the equal error rate for Iris?

We used three images from each iris class as reference images. The equal error rate (EER) was 0.86% using conventional matching (i.e., without using the deformation model) whereas the EER improved to 0.29% using the Bayesian graphical model-based matching.

What’s the difference between a CER and an EER?

When the two are equal, their common value is the CER or EER. The CER gives a way to compare systems. The smaller the CER the better. A smaller CER value means it’s possible to tune the system so that both the Type I and Type II error rates are smaller than they would be for another system.