Tecnocampus Hand Image Database

The acquisition over the VIS and TIR data was performed by a commercial thermal camera Testo 882-3. We have used a second external camera to obtain the NIR data. In this case we have built a NIR camera using a webcam changing the default optical filter for a couple of Kodak filters for IR. We have also used a printed circuit board with 16 infra-red LEDs that provide the infra-red illumination.

In order to alleviate the variability on the way the users present their hand we have used a kind of removable mask/template. Users had to put their hand in a neoprene surface with the help of a hand mask. Once the hand is placed the mask was removed and the three images (VIS, NIR, TIR) were shot. The same process was repeated with the palmar hand side, but using the mask in the opposite position (flip up to down).

Once the first acquisition was finished (no more than a minute) the user performed some exercise in order to change hand heat conditions. This step was carried out in less than 30 seconds so that when finished, the user proceeded again with the second acquisition. For each session a total of 12 hand images were captured per user.