Simple finger normalisation

Aligns the finger to the centre of the image using an affine transformation.

Simple finger normalisation, it aligns the finger to the centre of the image using an affine transformation. Elliptic projection which is described in the referenced paper is not implemented. Parameters for the affine transformation are estimated by fitting a straight line through the midpoints of the upper and lower detected finger edges. A possible method for detecting finger edges is given here:
http://www.mathworks.com/matlabcentral/fileexchange/35752-finger-region-localization

Literature:
- "Finger-vein authentication based on wide line detector and pattern normalization" B. Huang, Y. Dai, R. Li, D. Tang and W. Li
20th International Conference on Pattern Recognition (ICPR), 2010
doi: 10.1109/ICPR.2010.316

Comments:
Please leave a comment, if you like it, find a bug, or know (made) good improvements to the code.