How to import existing fingerprint data?

[starsoccer]

Hi,

I was looking at using this library for a project I am working on but one of the issues Im having is taking fingerprint data I get from the digitalpersona javascript SDK and importing it and having it read by this library.

Are there any examples of how to do this?

[lucasfelipecdm]

Hi @starsoccer, how are you?

One of the possibilities to solve your issue is save the data generated by the javascript SDK in a RAW format, then you can use the library function "dpfjCreateFmdFromRaw" to create a FMD from the RAW image, finally you can use the returned data, to identify, compare, save in database, etc... as a normal FMD.

But, this function "dpfjCreateFmdFromRaw" is not yet implemented, cause I don't test the RAW image convert, I'll work on it today, and then I can post a example for you.

[starsoccer]

hi @lucasfelipecdm

Thanks, but my understanding from reading the DP docs was that I first should create and store a matching template by running create enrollment fmd. Once I have the enrollment fmd I then need to store that and then use that to match against.

The documentation also says that "Importer.ImportFmd" should be used for importing non raw format so I think this would have to be added to support non raw formats, but perhaps I am misunderstanding.

[lucasfelipecdm]

Oh, I didn't find that part of the documentation that talks about import fmd, can you send me a print or the number of the page?

About the flow of enrollment, match and store data, I used this in my projects:

• Init lib;
• Init a async capture;
• Receive the FID from async capture;
• Create a FMD from FID;
• If a enrollment is going on, add the FMD to FMD pool using "dpfj_add_to_enrollment" (in library is dpfjAddToEnrollment), when the pool have enough FMDs, I create enrollment fmd using "dpfj_create_enrollment_fmd" (in library is dpfjCreateEnrollmentFmd) then I finish the enrollment.;

So, using my flow as a base, what we would do in your process (I think), is to save the RAW generated by the reader, using the functions of the JavaScript javascript, start reader, capture image, etc ... And then use the create fmd from raw function of uareu-node library.

Do you think this can work?

[starsoccer]

I am looking at the document on their website here https://devportal.digitalpersona.com/U.are.U%20SDK%20Developer%20Guide.pdf

On the bottom of page 47 it says how to use intermediate format with the Importer.ImportFmd and gives examples for java and .net but not C.

I just think because the RAW format is very big its not ideal to store that but maybe Im wrong.

[lucasfelipecdm]

Oh yes, I saw, so you are right, the better thing to do is store the FMD, and not the RAW.

Could you explain a little bit about your project?

[starsoccer]

Yeah thats my understanding.

To be honest I dont really have an intended project/use case in mind. I just have one of the sensors and have been interested to see how I could use this with javascript/node instead of C since I dont know it.

[lucasfelipecdm]

Okay, so I'm going to create an example of what I imagined and I believe that until Thursday I can post for us.

[starsoccer]

No problem no rush let me know if I can assist with anything.

[starsoccer]

Just following up on this

[lucasfelipecdm]

Oh, Hi @starsoccer, I don't forgot it, I'm finishing my graduation, and it's taking me a lot of time, and that's why I haven't been able to finish the example for you yet, but rest assured I will. hahaha

[starsoccer]

No problem not in a big rush will follow up in a few weeks

[starsoccer]

Any word on this?

[starsoccer]

Any word on this?

[baybal]

@lucasfelipecdm hello, is ImportFmd implemented now?