The Hong Kong Polytechnic University Single Shot Slap Fingerprint and Finger Knuckle Images Database

This database is acquired using a FBI-compliant slap fingerprint sensor that are widely deployed at the border crossings and used in various national ID programs, including Aadhaar. This imaging system is actually an addon system which just placed a low-cost imaging camera on the top of fingerprint sensor to simultaneously acquire slap finger-knuckle images in a single-fingerprint-imaging-shot and without any additional imaging system. This is the first such system and developed at the Hong Kong Polytechnic University. Above GUI interface illustrates simultaneously acquired finger-knuckle and fingerprint images using 4-4-2 imaging and also respective knuckle images after the segmentation.

Breif Description

The system captures the 4-4-2 slap fingerprint images and corresponding knuckle images simultaneously. It uses a commercial FS64 slap fingerprint sensor and a 5 mega-pixel camera placed at the top of such sensor. There are a total 116 subjects participated in such imaging. For each subject, 5 imaging instances are acquired. The imaging was done under ambient illumination in indoor and outdoor environment. The images are labelled using the following convention:

File naming convention: AAA-B-CC-D.bmp

Sample Images

The entire database as detailed above is made available to support further research and development efforts. The below sample finger dorsal images acquired along with slap fingerprint images. The first row from the same user using 4-4-2 imaging while the second row illustrates other users’ images acquired under the ambient imaging. These images also illustrate the knuckle region contours and respective bounding boxes in green color.

The images in the below figure illustrate simultaneously acquired fingerprint images from a slap fingerprint sensor, corresponding to a use with knuckle images in the first image of the above figure.

Download and Copyright

The database is being made available for the researchers from June 2023 onwards. Interested researchers should follow following steps to acquire "The Hong Kong Polytechnic University Single Shot Slap Fingerprint and Finger Knuckle Images Database"

1. Visit the online application link and provide all the details in this application form;
2. The request confirmation will be sent by email and the applicants can download the database using instructions in the email.

All the rights of the The Hong Kong Polytechnic University Single Shot Slap Fingerprint and Finger Kncukle Images Database are reserved and commercial use/distribution of this database is strictly prohibited. All the technical reports and papers that report experimental results from this database should provide due acknowledgement and reference. The reference should appear as 'The Hong Kong Polytechnic University Single Shot Slap Fingerprint and Finger Knuckle Images Database'. Questions regarding this database can be directed to Ajay.Kumar@polyu.edu.hk.

References

[1] Zhenyu Zhou and Ajay Kumar, " Finger-Knuckle Assisted Slap Fingerprint Identification System for Higher Security and Convenience.” IEEE Transactions on Information Forensics and Security, vol. 19, pp. 441-454, 2024.

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