FRIF is open source with a public repository on GitHub. Current implementation is based on the source code of BRISK provided by Stefan Leutenegger et al.
You can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. You should have received a copy of the GNU General Public License along with FRIF. If not, see http://www.gnu.org/licenses/.
Command line arguments:
-img the input image file
-kp the input region file
-des the output descriptor file
-type [2] 0 for detection, 1 for description, 2 for both detection and description.
-blobThresh [40.0] the threshold of FRIF detector
-border [50] the border of image
-supLine [1] do the line suppression or not
-lineThresh [20] the threshold for line suppression
1.0
OpenCV 3.0
[1] Zhenhua Wang, Bin Fan and Fuchao Wu, FRIF: Fast Robust Invariant Feature, in British Machine Vision Conference, 2013