GPDS960signature database

Off line signature database. It contains data from 960 individuals: 24 genuine signatures for each individual, plus 30 forgeries of his/her signature. The 24 genuine specimens of each signer were collected in a single day writing sessions. The forgeries were produced from the static image of the genuine signature. Each forger was allowed to practice the signature for as long as s/he wishes. Each forger imitated 3 signatures of 5 signers in a single day writing session. The genuine signatures shown to each forger are chosen randomly from the 24 genuine ones. Therefore for each genuine signature there are 30 skilled forgeries made by 10 forgers from 10 different genuine specimens. The signatures are in "bmp" format, in black and white and 300 dpi. The files of the genuine signatures are named xxx\c-xxx-yy.bmp and the files of the forgeries are named xxx\cf-xxx-yy.bmp where xxx is the number of the signer and yy its repetition. Download the license agreement, fill it out, sign it, and fax it to [phone] (Attn. Miguel A. Ferrer) Send an email to [e-mail], as follows: Subject DATABASE download Body: Your name, e-mail, phone number, organization, postal mail, Database you require, purpose for which you will use the database, time and date at which you sent the fax with the signed license agreement. Along with the email send a pdf file with the signed license agreement. Send by postal mail the original of your signed license agreement to the following address: Miguel Ángel Ferrer Ballester Departamento de Señales y Comunicaciones Universidad de Las Palmas de Gran Canaria Campus de Tafira s/n 35017 Las Palmas de Gran Canaria, SPAIN Once the fax and email of the license agreement have been received, you will receive an email with instructions to download the database. After you finish the download, please notify by email that you have successfully completed the transaction. For more information, please contact: [e-mail]

离线签名数据库（Off line signature database）包含960名个体的签名数据：每名个体对应24枚真实签名，以及30枚该签名的伪造签名。每名签名者的24枚真实签名样本均于单日的书写采集环节中完成采集。伪造签名基于真实签名的静态图像生成，每名伪造者可自由练习签名时长。每名伪造者需在单日的书写采集环节中，模仿5名不同签名者的各3枚签名，且每名伪造者所模仿的目标真实签名均从该签名者的24枚真实样本中随机选取。因此，每枚真实签名均对应30枚熟练伪造签名，由10名伪造者基于10份不同的真实签名样本生成。
所有签名均采用bmp格式，为黑白位图，分辨率为300dpi。真实签名文件的命名格式为xxxc-xxx-yy.bmp，伪造签名文件的命名格式为xxxcf-xxx-yy.bmp，其中xxx为签名者编号，yy为样本重复序号。
获取该数据库需遵循以下流程：
1. 下载许可协议，填写完成后签署，并传真至+34 928 451 243（收件人：Miguel A. Ferrer）。
2. 向[e-mail]发送邮件，邮件主题需标注为"DATABASE download"，邮件正文需包含：您的姓名、电子邮箱、电话号码、所属机构、通讯地址、所需数据库名称、数据库使用用途，以及您发送签署后许可协议传真的时间与日期。请随邮件附件一并提交签署后的许可协议PDF文件。
3. 将签署后的许可协议原件邮寄至以下地址：
Miguel Ángel Ferrer Ballester
信号与通信系
大加那利岛拉斯帕尔马斯大学
Tafira校区 s/n
35017 拉斯帕尔马斯德大加那利，西班牙

我方在收到您的传真与邮件后，将向您发送包含数据库下载指引的邮件。下载完成后，请通过邮件告知我们您已顺利完成交易。如需更多信息，请联系[e-mail]。

搜集汇总

背景与挑战

背景概述

GPDS960signature database是一个包含960人签名数据的离线数据库，每人提供24个真实签名和30个伪造签名。签名以300 dpi的黑白BMP格式存储，真实签名在一天内收集，伪造签名由10名伪造者模仿真实签名制作。