OSIRIS: An open source iris recognition software

•We present different versions of OSIRIS, an open source iris recognition software.•We report the impact of OSIRIS in the biometric community.•In version 4.1, non geometric parameterization contours normalization via Viterbi algorithm.•Comparative performances of version 4 and 4.1 are carried out on large database.•OSIRIS is a relevant tool for benchmarking novel iris recognition algorithms.