Hi

the problem with device-independent representation is that different sensors 
use different technology (touch sensors opposed to sweep sensors), and have 
different image size. if all these parameters are the same then the data could 
be theoretically device independent (note that libfprint stores driver-id in 
its files, so you would have to override this)

NBIS software (used internally by libfprint) can extract fingerprint data from 
an image, but AFAIK does not provide any functionality not used in libfprint

Pavel

On Friday 21 of November 2008 17:58:08 Zé Carlos wrote:
> The blob type issue is not a problem for me, but the hardware-specific
> generated code can be a problem, i need a hardware-independent
> representation, i can't guarantee that all readers will have the same
> brand. So the better way would be image based data, right?
> Does not exist any kind of tool or algorithm which can extract some kind of
> portable code from a fingerprint image?
> Thanks for answering me.
>
> Regards,
> José Trancas
>

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