PopSift is licensed under MPLv2 license.

More info about the license and what you can do with the code can be found at tldrlegal website

SIFT was patented in the United States from 1999-03-08 to 2020-03-28. See the patent link for more information. PopSift license only concerns the PopSift source code and does not release users of this code from any requirements that may arise from patents.

Contact us

You can contact us on the public mailing list at alicevision@googlegroups.com

You can also contact us privately at alicevision-team@googlegroups.com

Cite us

If you want to cite this work in your publication, please use the following

    author = {Griwodz, Carsten and Calvet, Lilian and Halvorsen, P{\aa}l},
    title = {Popsift: A Faithful SIFT Implementation for Real-time Applications},
    booktitle = {Proceedings of the 9th {ACM} Multimedia Systems Conference},
    series = {MMSys '18},
    year = {2018},
    isbn = {978-1-4503-5192-8},
    location = {Amsterdam, Netherlands},
    pages = {415--420},
    numpages = {6},
    doi = {10.1145/3204949.3208136},
    acmid = {3208136},
    publisher = {ACM},
    address = {New York, NY, USA},


This has been developed in the context of the European project POPART founded by European Union’s Horizon 2020 research and innovation programme under grant agreement No 644874.