Convert Griuale fingerprint templates to Digital Persona

Question

I have fingerprint templates stored in SQL Server database using Griaule SDK, now I need to migrate to Digital Persona SDK but it raises error when I try to read the templates, of course I think both have different format. My question it is How can I read or convert my templates from Griaule to Digital Persona.

Answer 1

You're right, you need to use a standard format as ISO or ANSI.

To convert from Griaule to ISO or ANSI, please refer : http://www.griaulebiometrics.com/en-us/manual/fingerprint-sdk/programming-reference-guide/fingerprint-sdk-dll-reference-guide/extraction-functions/grcovertemplate

Something like this (depends on Griaule SDK and language):

int result;
// set current buffer size for the extract template
_newTpt->_size = GR_MAX_SIZE_TEMPLATE;
result = GrConvertTemplate((char*)_oldTpt, (char*)_newTpt->_tpt, &_newTpt->_size, GR_DEFAULT_CONTEXT, GR_FORMAT_ANSI);

// if error, set template size to 0
if (result < 0){
    // Result < 0 => conversion problem
    _newTpt->_size = 0;
}

Template Griaule format are available here : http://www.griaulebiometrics.com/en-us/manual/fingerprint-sdk/programming-reference-guide/return-codes-and-constants/template-format

After you have to convert this ISO or ANSI template to Digital Persona Format as this:

Fmd fmd = UareUGlobal.GetImporter().ImportFmd(
                    byteArray, Fid.Format.ANSI_381_2004,
                    Format.DP_REG_FEATURES);