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luannd / MinutiaeNet

Code and models for paper "Robust Minutiae Extractor: Integrating Deep Networks and Fingerprint Domain Knowledge" at International Conference on Biometrics (ICB) 2018
https://arxiv.org/pdf/1712.09401.pdf
MIT License
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Doubts about training data #12

Closed xstz closed 5 years ago

xstz commented 5 years ago

I have two question；

  1. In the example, the data: - img_files/.bmp, - mnt_files/.mnt , - seg_files/*.jpg. is needed when train the corasenet, the orientation field of the fingerprint is not necessary. but the net include a function about enhancement the raw fingerprint image(gaber filter). I don't understand how the gaber filter get the orientation? and there is no loss function for the orientation.
  2. The mnt_files/.mnt file include the orientation about the minutiae. i want to know the format about the 0~ 2pi ? or others.
luannd commented 5 years ago

Sorry for late reply.

  1. That function enhances the image to get a robust orientation field. We use that orientation as minutiae orientation in this code.
  2. Yes. 0~2pi (if I remember correctly)