KTU CVPR Lab. Contactless Palmprint Database


Description of the KTU CVPR Lab. Contactless Palmprint Database:

The KTU CVPR Lab. Contactless Palmprint Database contains 1752 color images corresponding to 145 different palms in BMP image format. In that, 580 images were used as training set, and 1172 images were also used as test set.

Each image in the database was taken using low cost CCD camera with resolutions 768 x 576 pixels at 75 dpi. Number of the samples per individual in the database were restricted between 6 and 30. Average number of images for each palm is 12.

The images in the database is collected with different scenarios:
(1) The environment brightness was changed by decreasing/increasing the light intensity in the room to reveal the invariability on the external brightness.
(2) The users are asked to present their hands toward the capturing device by changing the hand-camera distance to construct a database with different shaped hand images.
They are also asked to present their hands in various pose and translations:
- strongly bending their hands downward,
- changing the space between the fingers,
- excessively moving their hands in the forward/backward, and the left/right directions,
- different hand rotations to right and left sides.
(3) The objects which have similar textures and colors such as faces, other hands and complex textured objects were added to the background (cluttered backgrounds).
(4) In the meantime, we captured the images at different times during the day so as to acquire natural differences on the external lighting conditions.
(5) Furthermore, the users did not remove the rings or other ornaments from their fingers while the hand images were taken.
(6) The KTU-Contactless Palm DB also includes hand images which have partly viewed palms or occlusions to the palmprint regions.

There is a hand at the background There is a paper at the background There is a plate at the background Thumb finger is out of the scene The hand is moved excessively to right The hand is rotated to the left direction The hand is rotated to the right direction The fingers are upwardly inclined The fingers are downwardly inclined The hand is leftward inclined The hand is moved excessively to forward The hand is moved excessively to backward The spaces between the fingers are reduced The spaces between the fingers are increased The environment brightness is decreased The environment brightness is increased A light source is present on the scene The hand-camera distance is changed (large) The hand-camera distance is changed (small) The ring is not removed from a finger The distance between the thumb and index finger is decreased There is a trace at the palmprint The palm region is overlapped with clothes There is a face at the background There is a book at the background



The comparison of the KTU-Contactless Palm DB with the widely used international contactless Palm DB - IITD DB - is shown in the Table 1.

Table 1. Comparisons of the contactless palm DBs.

Features

Databases

KTU Contactless Palm DB

IITD DB

Number of individuals:

145

235

Number of palms:

145

470

Total number of images

1752

2769

The minimum number of samples per palm

6

5

Background complexity

Yes

No

Taking the images in different environment brightness:

Yes

No

Changing the spaces between the fingers:

Yes

No

Pose, rotation and location variations:

Yes

Yes

3-D pose variations:

Yes

Yes

Existence of a ring on the finger:

Yes

Yes

Pixel resolutions:

768×576

800×600


The Announcement of the Copyright

All rights of the KTU CVPR Lab. Contactless Palmprint Database are reserved. The database is only available for research and noncommercial purposes. Commercial distribution or any act related to commercial use of this database is strictly prohibited. All public work based on the KTU CVPR Lab. Contactless Palmprint Database should clearly and prominently carry the following acknowledgement:

"Portions of the work were tested on the KTU CVPR Lab. Contactless Palmprint Database."

A citation to "Aykut M., and Ekinci M., Developing a contactless palmprint authentication system by introducing a novel ROI extraction method, IMAGE AND VISION COMPUTING, vol.40, pp.65-74, 2015" must also be added in the references. A soft copy of any released or public documents that use the KTU CVPR Lab. Palmprint Contactless Database must be forwarded immediately to: ekinci@ktu.edu.tr


Downloading Steps:

This database is made publicly available and can be obtained from this website. It is totally free for academic, noncommercial purposes. Any person or organization that wishes to use the database must agree to the terms of the agreement and fill in the agreement forms. The request confirmation will be sent by an email and the successful applicants will receive their login accounts and passwords to download the database.

Application Form


Contact Information:

Computer Vision and Pattern Recognition Lab.
Karadeniz Technical University
Trabzon, TURKEY
E-mail: ekinci@ktu.edu.tr


 

 


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