IEC 29197-2015 pdf free download – Information technology — Evaluation methodology for environmental influence in biometric system performance.
6.3Selection of the evaluation conditions6.3.1 General
The selection of the evaluation conditions entails two activities.Firstly , the parameters to be assessedand/or controlled shall be defined and reported depending on the type of biometric evaluation (e.g.temperature, humidity). This decision is mainly based on the biometric modality of the system undertest as well as the type of technology used by its capture sensor.These parameters shall be selected byparties involved in the evaluation.
NOTE ISO/IEC/TR 19795-3[1] lists environmental factors that can impact performance on a modality-by-modality basis.
Then, the measuring points and set points shall be specified for the selected environmental parametersto assess and/or control respectively. This specification shall consider two aspects: the types ofbiometric performance evaluation (i.e. scenario or operational evaluation) and the different phases ofthe recognition process (i.e.enrolment and verification).
This subclause establishes requirements to select the measuring and set points for both types ofenvironments (i.e. target evaluation environment and reference evaluation environment) consideringalso the aspects above mentioned.
NOTE Since it is mandatory for scenario test methodology to carry out evaluations to obtain the baselineperformance apart from any other evaluation performed in the target evaluation conditions, these values can bespecified for the reference evaluation environment and the target evaluation environments.
6.3.2 Reference evaluation environment for scenario evaluations
The reference evaluation environment defines the values or ranges for different environmentalparameters under which baseline performance data will be obtained in scenario evaluation.
Evaluation conditions for this environment shall be specified for the environmental parameters to beassessed and controlled. The values shall be defined considering the values proposed for a standardenvironment in Annex A.
lf some parameters are dependent, the specification of these parameters shall be according to theirdependency.
The laboratory testing environment should reach these reference values without any additionalequipment. Therefore, the evaluation configuration is not disturbed by anything and it will be possibleto obtain performance results considering only the influence of the environmental parameter undertest, apart from the common factors that affect biometric systems.
6.3.3Target evaluation environments
6.3.3.1General
This Clause describes how to select the evaluation conditions for carrying out enrolment and verificationfunctionalities depending on the type of biometric evaluation and the particular objectives to achievein the environmental evaluation.
ltis recommended that the value or range of environmental factor /factors to be assessed will be relevantto the target environment (modelled or real).
6.3.3.2 Enrolment evaluation conditions
This environment shall be the environment in which users are enrolled.For scenario evaluations, thisenvironment shall be selected by parties involved in the evaluation considering the objectives of theenvironmental testing. There are two possibilities for selecting it:
-similar to the reference evaluation environment, or
-a specific environment.
NOTE1lf the target evaluation is a scenario evaluation to analyse the influence of one or a combination ofenvironmental parameters, the proper enrolment environment will be an environment similar to the referenceevaluation environment.
NOTE 2 lf the target evaluation is a scenario evaluation to analyse a specific environment, the enrolmentenvironment can be selected considering both options.The most appropriate enrolment environment will dependon the objectives to achieve with the environmental testing.
NOTE3 In the case of a scenario evaluation performed to obtain the baseline performance for an operationalevaluation, the enrolment environment can be selected similar to the operational environment where theenrolment is going to be carried out.
NOTE4 lf an objective of the evaluation is to determine the influence of specific environmental factors onenrolment rates and/or the quality of enrolments, these parameters can be specified in addition to the referenceevaluation environment.
For operational evaluations, this environment shall be the particular environment where enrolment isperformed during typical operations.
6.3.3.3 Verification evaluation conditions6.3.3.3.1 General
The verification evaluation environment is the environment in which biometric trials take place.Verification evaluation conditions vary for scenario and operational evaluations.IEC 29197 pdf download.