The BiometricScanner is a base class for nonvisual objects that can read and process biometric data. The HPBiometricScanner object implements the methods and properties of this base class for the purpose of scanning fingerprints.
BiometricScanner property |
Datatype |
Description |
|---|---|---|
Integer |
Bitset of authentication techniques used by the biometric scanner, including voice, fingerprint, and iris recognition |
BiometricScanner function |
Datatype returned |
Description |
|---|---|---|
Integer |
Optional method that clears all buffers, detaches from the scanner firmware, and unloads all scanning DLLs. By default, this method is called by the BiometricScanner object destructor. |
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Integer |
Specifies whether the false acceptance rate (FAR) has precedence over the false rejection rate (FRR). This has meaning only if both the FAR and FRR have non-default values. |
|
Integer |
Sets or retrieves the FAR. |
|
Integer |
Sets or retrieves the FRR. |
|
Integer |
Loads the scanning DLLs and connects to the scanner firmware. |
|
Integer |
Sets the timeout period for a (synchronous) scan. The timeout period is the amount of time allowed to elapse before a scan resumes following a pause in the scanning. Asynchronous biometric scans are not supported. |
|
Integer |
Retrieves the image from the most recent scan. If height and width attributes are not provided in this function call, the bitmap file (BMP) representing the image uses the default image size. |
|
Integer |
Retrieves the encoded minutiae buffer from the most recent scan. |
|
Integer |
Returns the quality rating from the most recent scan. |
|
Integer |
Compares the current candidate minutiae against the template (stored) minutiae records. A successful return value (+1) indicates they match within the specified FAR/FRR ratio. |
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