Threshold
A term from the College of Policing Authorised Professional Practice (APP), reproduced under the Open Government Licence with a link back to the authoritative source.
Definition
The configurable point at which two images being compared will result in an alert.
This definition is drawn from the College of Policing Authorised Professional Practice. For the full operational guidance and current wording, read it at source.
Related terms
Adjudication
A human assessment of an alert generated by the LFR application by an LFR engagement officer to decide whether to engage further with the individual matched to a watchlist image.
Administrator
A specially trained person who has access rights to the LFR application, in order to optimise and maintain its operational capability.
Alert
A notification generated by the LFR application when a facial image from the video stream returns a comparison score above the threshold.
Application accuracy
Application accuracy can be considered to consist of the combined LFR technology accuracy and the human in the loop decision-making process.
Authorising officer (AO)
The officer who provides the authority for LFR to be deployed.
Biometric template
A digital representation of the features of the face that have been extracted from the facial image.
Definition reproduced from the College of Policing Authorised Professional Practice under the Open Government Licence v3.0. See the source link above for the authoritative, current wording.