Fig 1.
Instruments of finger-vein pattern authentication.
(A) Experimental set-up for capturing finger-vein pattern images is composed of a near-infrared light source, a CCD camera, a video capture card, and a laptop computer. (B) A finger put against the light source to capture its vein pattern image. (C) Example of an acquired finger-vein pattern image. (D) A processed image.
Table 1.
Characteristics of patients and controls.
Fig 2.
Same-finger and different-fingers authentication results for patients and healthy volunteers.
Images obtained on the same day were used for both same-finger (⬛/⬜) and different-fingers (▲/△) authentication. Mean values plus/minus one standard deviation are plotted. *** p<0.001.
Fig 3.
Time course of same-finger C values for images compared with those first acquired in June.
Mean values plus/minus one standard deviation are plotted. *** p<0.001.
Fig 4.
Time course, in each disease, of same-finger C values for images compared with those first acquired data in June.
August DM/PM data could not be acquired because of the absence of patients. Mean values are plotted. ** p<0.01, *** p<0.001.