Research Article
Finger-Vein Recognition Using Bidirectional Feature Extraction and Transfer Learning
Figure 5
Finger-vein image preprocessing. (a) Input finger vein. (b) Mean filtering. (c) Edge detection. (d) Closing operation. (e) Skeletonization. (f) Denoising. (g) Intercept finger area. (h) Size normalization. (i) Image enhancement.