Biometrics

Does IDKit return the best matching user or the first matching user?
IDKit always returns the best match. The whole database is internally sorted by similarity score. Similarity threshold and result count limit (candidate c...
Mon, 28 Nov, 2016 at 11:18 AM
How does IDKit handle ambiguity?
If there are multiple matches above the threshold, they are returned all, sorted by score, up to the results count limit (candidates count). It is up to the...
Tue, 8 Sep, 2015 at 12:43 PM
What is the general error rate that can be expected from IDKit?
Error rates depend on many factors including scanner model, population, number of fingerprints per user, enrollment strategy (1 sample vs. more samples of t...
Fri, 26 Feb, 2016 at 3:29 PM
How does image DPI affect error rates?
IDKit internally converts all images to 500DPI before extracting template. For this reason, 500DPI images provide highest accuracy. Lower DPI images are acc...
Tue, 8 Sep, 2015 at 12:44 PM
Why does verification return different score when fingerprints are compared the other way round?
This is normal behavior. Fingerprint matching algorithm is not symmetrical. Swapping gallery and probe fingerprints result in a slightly different score bec...
Fri, 18 May, 2018 at 2:21 PM
How can I use IDKit templates in other software?
IDKit templates cannot be used outside IDKit, because they contain various IDKit-specific information intended to improve accuracy and performance. IDKit ca...
Tue, 8 Sep, 2015 at 12:45 PM
Do you support ANSI/NIST ITL-2000 standard?
ITL-2000 is not supported. If you need standard template interchange format, you can use ANSI/INCITS 378. IDKit PC SDK can export templates in ANSI/INCITS 3...
Tue, 8 Sep, 2015 at 12:45 PM
What is the meaning of quality returned by IEngine_GetFingerprintQuality?
Function IEngine_GetFingerprintQuality returns a value between 0 and 100 approximating fingerprint quality with 100 denoting best quality and 0 denoting wor...
Tue, 8 Sep, 2015 at 12:45 PM
How exactly is the fingerprint quality calculated?
Fingerprint image quality is linked to the total surface of ridges found in the fingerprint ("usable" surface area which is not classified as back...
Wed, 16 May, 2018 at 9:12 PM
More details on normalization:
IEngine_GetTemplateQuality method does quality score normalization that is relative to the image size. The reason behind this is that our customers work wit...
Wed, 16 May, 2018 at 9:13 PM