Jim Wayman（英国首席专家）：人脸和指纹：协调不同的生物特征图像质量概念.pdf

1、Reconciling Differing Concepts of Biometric Image QualityJames L.Wayman,Ph.D.,LFIEEE104/01/2025The Importance of DefinitionsNo quantity can be measured with more accuracy or precision than that in which it is defined Definitional accuracy and precision limits measurement accuracy and precisionDiffer

2、ent definitions will lead to different values and different applications for a 204/01/2025Complexities in Defining“Biometric Quality”ISO/IEC 29794-1“Information technology Biometric sample quality Part 1:Framework”presents 3 interrelated conceptualizations of“quality”Character:set of attributes asso

3、ciated with a biometric characteristic that cannot be controlled during the biometric acquisition process Biometric fidelity degree to which a biometric sample is representative of its source biometric characteristic Biometric utility degree to which a biometric sample supports biometric recognition

4、 304/01/2025“Character”“Biometric Recognition”is a human/machine technology “Character”,mentioned explicitly in all Parts of 29794,refers to human characteristics that“cannot be controlled”(by collector)but sometimes can be tested Implies Platos idealized concept of“form”Inherent demographic bias As

5、sumed but not tested Faces have 2 aligned eye sockets Time invariant Explicitly tested:Fingers have coherent friction ridges Face not occluded beards Iris boundaries concentric,iris/pupil/sclera gray scale difference 404/01/2025“Fidelity”Primarily technical characteristics of“representative”collecti

6、on Collection device characteristics defined in Annex D of relevant parts of ISO/IEC 39794“Extensible Biometric Interchange Formats”Limitations:Part 4(Contact FP),Part 5(Machine Readable Travel Docs)Concepts of“fidelity”differ across modes Illumination specified for Part 5(Face)and Part 6(Iris)but n