Updated license in readme

Author: skokec

README.md

@@ -2,7 +2,15 @@
 
 Official TensorFlow implementation for [Segmentation-based deep-learning approach for surface-defect detection](https://prints.vicos.si/publications/370) that uses segmentation and decision networks for the detection of surface defects. This work was done in collaboration with [Kolektor Group d.o.o.](http://www.kolektorvision.com/en/).
 
-Code and the dataset are available for research and non-commercial use only.
+[![CC BY-NC-SA 4.0][cc-by-nc-sa-shield]][cc-by-nc-sa] 
+
+Code and the dataset are licensed under [Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License][cc-by-nc-sa].
+
+[![CC BY-NC-SA 4.0][cc-by-nc-sa-image]][cc-by-nc-sa]
+
+[cc-by-nc-sa]: http://creativecommons.org/licenses/by-nc-sa/4.0/
+[cc-by-nc-sa-image]: https://licensebuttons.net/l/by-nc-sa/4.0/88x31.png
+[cc-by-nc-sa-shield]: https://img.shields.io/badge/License-CC%20BY--NC--SA%204.0-lightgrey.svg
 
 # Citation: