[fprint] Capturing images

[Ismael Barros²]

Hi,

I'm trying to use libfprint with my laptop's fingerprint reader
(147e:2016 Upek Biometric Touchchip/Touchstrip Fingerprint Sensor)
just to capture fingerprints.

fp_dev_supports_imaging() returns 1, so image capturing should work,
but when I try to fp_dev_img_capture(), it returns -95.

Does anyone know what could the reason of this behaviour be? Any
suggested fix or workaround? i.e. would it be possible to use the
enrollment procedure to get an image and then abort the enrollment? It
must be feasible, because at least fprint_demo is able to capture and
show fingerprints.

Thanks a lot,
Ismael