Abstract:

In order to avoid the impact to the region of interest (ROI) extracted results by random movements of finger when finger-vein images are collected, an approach for locating and extracting the region of interest from finger-vein image was studied. First, the random variations of the finger’s positions were corrected by computing its profile’s primary direction and inter-phalangeal joint’s position, and the ROI was roughly found. Then, an iteration method was applied to obtain the accurate extraction of ROI. The experimental results on a small database showed that the clustering property of ROI extracted better results. This method could extract similar ROIs from fingervein images of a finger, even if its posture is changed.

Key words:  finger-vein image, finger profile, finger joint localization, region of interest