公开(公告)号：US20240005702A1

公开(公告)日：2024-01-04

申请号：US18039337

申请日：2021-11-29

Applicant: Fingerprint Cards Anacatum IP AB

Inventor： Arvid HAMMAR ,  Hans MARTINSSON ,  Su LIU

IPC: G06V40/40 ,  G06V40/13 ,  G06V10/143

CPC classification number: G06V40/40 ,  G06V40/1318 ,  G06V10/143

Abstract: A biometric imaging arrangement comprises an image sensor comprising a photodetector pixel array for capturing an image of an object. An infrared cut-off filter is arranged to at least partly cover the photodetector pixel array. The infrared cut-off filter comprises a first filter area having a first transmission wavelength band including wavelengths in the visible range of wavelengths, and at least two additional filter areas having transmission wavelength bands including wavelengths in the visible range of wavelengths. The transmission wavelength bands of the additional filter areas being different from the first transmission wavelength band, wherein at least two of the additional filter areas are spatially separated by the first filter area.

公开(公告)号：US20230137785A1

公开(公告)日：2023-05-04

申请号：US17917806

申请日：2021-03-29

Applicant: Fingerprint Cards Anacatum IP AB

Inventor： Johan HAMMERSBERG ,  Eric SETTERBERG ,  Mattias CARLÉN ,  Su LIU

IPC: G06V40/40 ,  G06V40/12 ,  G06V40/13 ,  G06V10/145 ,  G06V10/147 ,  G06V10/56 ,  G06V10/82 ,  G06F21/32

Abstract: The present invention relates biometric authentication using an optical biometric arrangement comprising an image sensor comprising a photodetector pixel array configured to capture an image of an object, the image sensor being arranged under a controllable light source comprising light source units, the method comprising: providing a light pattern comprising portions of different light intensity for illuminating the object; acquiring an image of the object, the image comprising image portions corresponding to the portions of different light intensity of the light pattern illuminating the object, at least one image portion being captured by pixels in he photodetector pixel array arranged directly under a light source unit being active during image acquisition, and at least one image portion being captured by pixels in the photodetector pixel array arranged under an at least partly in-active illumination area of the controllable light source during image acquisition, performing biometric authentication at least partly based on metrics extracted from the image portions.