Biometric Recognition Group - ATVS



Guardia Civil Database (GCDB) : A real forensic fingerprint casework database from Spanish law enforcement agency.

Please note that only the minutiae are distributed.

INSTRUCTIONS FOR DOWNLOADING GCDB Features
  1. Download license agreement, sign one copy, and send by email to atvsuam.es according to the instructions given in point 2.

  2. Send an email to atvsuam.es, as follows:
    Subject: [DATABASE download: GCDB Features]
    Body: Your name, e-mail, telephone number, organization, postal mail, purpose for which you will use the database, time and date at which you sent the email with the signed license agreement.

  3. Once the email copy of the license agreement has been received at ATVS, you will receive an email with a username, a password, and a time slot to download the database.

  4. Download the database, for which you will need to provide the authentication information given in step 3. After you finish the download, please notify by email to atvsuam.es that you have successfully completed the transaction.

  5. For more information, please contact: atvsuam.es

DESCRIPTION OF GCDB Features

The database comprises of 268 latent fingerprint minutia templates and their corresponding 268 mated tenprint fingerprint minutia templates which includes rare minutiae. All the minutiae in the latent templates are manually annotated by forensic examiner. The minutiae in the tenprint consists of both manually annotated and automatically extracted using VeriFinger-SDK. The manually annotated minutiae in the tenprint templates are those which establishes one-to-one correspondences with that of its mated latent minutiae. This can be identified using the index numbers, i.e., the minutia corresponding to index i in latent template is the one matched with the index i of tenprint template.

FILE FORMAT

The minutiae information together with its index numbers are stores as .txt file.

FILE NAMING CONVENTION

All the latent templates begin with letter A, followed by 4 to 6 characters inside the folder "gcdbLatents". The corresponding mated tenprint template begins with letter B, followed by exact 4 to 6 characters that of its latent template inside the folder "gcdbTenprints".

TEMPLATE FILES

Each template consists of five columns C1 to C5.

C1 : The index for a minutia. Those minutiae which established one-to-one correspondence between the latent and tenprint fingerprint minutia shares same index in the template.

C2 : X-coordinate of the minutia.

C3 : Y-coordinate of the minutia.

C4 : Minutia orientation in the range 0 to 360 degrees.

C5 : Minutia type number. The type of the minutia corresponding to the number is listed in Table 1, and pictorially depicted in Fig 1. Some rare and typical minutia features are shown in Fig 2. 


REFERENCES

For further information regarding the database, please refer to the following publication:

  • [PLOS2016] R. P. Krish, J. Fierrez, D. Ramos, & F. Gomez-Herrero, “Improving Automated Latent Fingerprint Identification using Extended Feature Sets”, PLOS ONE, Public Library of Science, 2016.

Please remember to reference article [PLOS2016] on any work made public, whatever the form, based directly or indirectly on any part of the GCDB features.













Fig 1




Table 1






Fig 2. Typical minutiae (ridge-ending, bifurcation), extended features
(assemble,ridge-crossing, enclosure) and singular points (core, delta)
in an exemplar fingerprint from NIST-SD27 database.