Inspec keywords: image texture; feature extraction; image fusion; visual databases; biometrics (access control)

Other keywords: rich features; FT characteristic; deep finger texture; Hong Kong Polytechnic University Contact-free 3D/2D; CASIA Blue spectral; CASIA White spectral; CASIA multispectral image database; people verification; deep learning; CASIA-BLU; verification approach; deep FT learning; lower knuckle; biometric characteristic; fingerprint; PolyU2D; upper phalanx; CASIA-WHT; human recognition

Subjects: Spatial and pictorial databases; Data security; Computer vision and image processing techniques; Image recognition