Glossary
active liveness detection - Liveness detection that requires the user to perform a requested action.
auto capture - Component that takes a photo of the desired object (either document or face) in the required quality without the user having to press the shutter button.
comparison score - Indicates the degree of similarity between two biometric samples.
document - In the scope of this documentation, this refers to “photo identity document”
document auto classification - Determining the issuing country, front or back page and type of document, such as passport or driving license, from the document image.
EER - Equal Error Rate, the rate at which FAR and FRR reach the same value
face detection - Process that identifies whether the provided image contains a face, analyzes the parameters of that face, and returns a face template.
face size - The larger of the two: the eye distance and the eye to mouth distance (distances are shown in the picture below).
face matching - Process that compares probe face with reference face and provides a similarity score for decision if the faces match.
face size ratio - Ratio between the face size and the shorter side of an image.
face template - Compact representation of face characteristics extracted from the face image by a neural network. This is used for face matching.
FAR - False Accept Rate, represents the probability that the system incorrectly accepts an unauthorized user.
FRR - False Reject Rate, defines the probability that the user is not correctly recognized and hence denied access.
FRVT - Face Recognition Vendor Testing, testing provided by NIST organization
iBeta - Organization providing testing, including biometrics testing & certifications
ICAO - International Civil Aviation Organization
identity document, ID document - In the scope of this documentation this refers to “photo identity document”
ISO 30107-03 - Standard on biometric presentation attack detection
KYC - Know Your Customer
liveness detection - System’s ability to determine that it is interfacing with a physically present human being and not an inanimate spoof artifact or injected video/data. See also presentation attack detection.
minimum valid face size ratio - Limit value for minimum face size ratio. This limit is different for each detection mode.
Fast detection mode (
dot-face-detection-fastmodule in Mobile SDK):MinValidFaceSizeRatio = 12 / ShorterSideBalanced detection mode (
dot-face-detection-balancedmodule in Mobile SDK):MinValidFaceSizeRatio = max{ (3 / ShorterSide) , (LongerSide / (120 * ShorterSide)) }
ShorterSide and LongerSide values are in pixels.
MRZ - Machine Readable Zone, area of photo identity document that contains important information encoded in a few lines of text that can be easily read with scanning machines
NIST - National Institute of Standards and Technology
NFC - Near Field Communication
OCR - Optical Character Recognition, process of extracting text to a digital form from an image
PAD - Presentation Attack Detection, see below
passive liveness detection - Liveness detection that does not require the user to perform any action.
photo identity document - Identity card proving the identity of its holder, having a photo and personal data.
presentation attack detection - Biometric data can be easily obtained directly from a person, online, or through existing databases and then used to create spoofs (or fakes) to mount an attack. The presentation of a biometric spoof (e.g. a facial image or video of a person on a tablet) to a biometric sensor (phone camera) can be detected by methods broadly referred to as presentation attack detection, PAD. See also Liveness detection.
RFID - Radio Frequency Identification
sample - Biometric sample is information obtained from a biometric capture device, in the scope of this documentation it is a face photo.
TD1 .. TD3 - Travel Document type 1-3, as defined by ICAO Document 9303
template - Biometric template is a set of stored biometric features, created by converting a biometric sample to a binary representation (in a process called extraction).
threshold - Value of the comparison score that is used to decide whether there is a match.