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INSTRUCTIONS FOR DOWNLOADING ATVS-SSig DB

  1. Download license agreement, send by email one signed and scanned copy to atvsuam.es according to the instructions given in point 2.
     

  2. Send an email to atvsuam.es, as follows:
    Subject: [DATABASE download: ATVS-SSig DB]

    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 4. 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 ATVS-SSig DB

Two datasets of fully on-line synthetic signatures generated according to the original method described and validated in [PR2012-I] and [PR2012-II]:


    DATASET 1: DS1_Modification_TimeFunctions

In this case the duplicated samples are generated modifying directly the time functions of the master signature according to the method described in Sect. 5.1 of [PR2012-I].

It contains 25 signatures of 350 users.

The first 5 signatures follow an intra-session variability and the remaining 20 an inter-session variability.


    DATASET 2: DS2_Modification_LNparameters

In this case the duplicated samples are generated modifying the LogNormal parameters of the master signature according to the method described in Sect. 5.2 of [PR2012-I].

It contains 25 signatures of 350 users.

The first 5 signatures follow an intra-session variability and the remaining 20 an inter-session variability.


    FILES FORMAT

The signatures are stored in txt files with 5 columns, where:

  • COLUMN 1: represents the x coordinate.

  • COLUMN 2: represents the y coordinate.

  • COLUMN 3: this is a synthetic timestamp (it may be neglected).

  • COLUMN 4: indicates the penups. It is 0 where p=0, and 1 otherwise.

  • COLUMN 5: represents the pressure (p) function.


    FILES NOMENCLATURE

The nomenclature followed in both datasets to name the signature files is as follows: uXXXX_sgYY.txt

  • XXXX: is the number of the user [1001, 1002, ... , 1350]

  • YY: is the number of the sample [1, 2, ... , 25]



REFERENCES

For further information on the database and on different applications where it has been used, including vulnerability assessment of signature verification systems to brute-force attacks, and performance evaluation of different signature recognition systems, we refer the reader to (all these articles are publicly available in the publications section of the ATVS group webpage.)

Please remember to reference articles [PR2012-I] and [PR2012-II] on any work made public, whatever the form, based directly or indirectly on any part of the ATVS-SSig DB.

 
On-line syntetic signatures 1

On-line syntetic signatures 2