Description
Return a biometric score decision with explicit equality and direction.
Biometric scores depend on matcher version, score direction, acquisition handling and an explicit operating threshold. Score transformations and observed error fractions are different from identity verification; equality, quantization and excluded attempts can change the local reported result.
Return a biometric score decision with explicit equality and direction.
When to use this tool
Use Verification Threshold Equality Flag when checking the stated biometric score, threshold, reporting precision or error-denominator convention.
How to use the tool and how it works
- Enter score, threshold, higherMatches, equalityAccepted. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read acceptedUnderRule, tied. Inspect acceptedUnderRule, tied before interpreting the associated values.
Return a biometric score decision with explicit equality and direction. Accept strict oriented score-threshold > 0, or exact equality when equalityAccepted; tied tests exact equality.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| score | Score | Required. Finite number. |
| threshold | Threshold | Required. Finite number. |
| higherMatches | Higher Matches | Required. Boolean. |
| equalityAccepted | Equality Accepted | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| acceptedUnderRule | Accepted Under Rule | Required. Boolean. |
| tied | Tied | Required. Boolean. |
{
"input": {
"score": 0.5,
"threshold": 0.5,
"higherMatches": true,
"equalityAccepted": true
},
"output": {
"acceptedUnderRule": true,
"tied": true
}
}Limitations and assumptions
- No biometric comparison, calibrated confidence, identity authentication or actual access decision is performed.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Evaluate a validated matcher on relevant complete data with explicit acquisition/exclusion and threshold policies; assess uncertainty, privacy and fairness independently.
References
Similar or alternative tools
- Match Score Margin To Threshold
Return score margin and a supplied threshold decision.
- Biometric Threshold Tie Policy
Apply a biometric threshold tie policy.