v1.1.1

open-iris v1.1.1

Changelog

Major

Added

• SimpleHammingDistanceMatcher, a hamming distance-based iris template matcher without the bells and whistles. It functions ~2x faster than HammingDistanceMatcher, is more readable and just does fractional hamming distance with the option to normalise the result by the fraction of visible bits.

Changed

• Refactor parameters for HammingDistanceMatcher and the underlying utils function hamming_distance. Parameters used to be nm_dist: Optional[float], i.e. either None or a float, the mean HD to normalise towards. Parameters are now normalise: bool: wether to normalise the hamming distance by the fraction of visible bits, nm_dist: float: the mean HD to normalise towards, and nm_type: Literal["sqrt", "linear"], i.e. a string that is either "sqrt" or "literal" which represent the type of normalisation ("sort" is equivalent to the previous behaviour)

Minor

Added

• Interface Matcher and BatchMatcher, from which HammingDistanceMatcher and SimpleHammingDistanceMatcher inherit from.

Removed

• Remove upper bound on HammingDistanceMatcher's rotation_shift parameter. This parameter represents the rotation in the angular direction of the iris template, and is expressed in bits (not degrees as was previously expressed).

Changed

• Modified the HD normalisation function slightly. Only the cases where HD is normalised and less than 1/4 of the iris texture is masked are affected

Fixed

• The output_builder build_simple_debugging_output was always returning None values for the intermediary results geometry_mask and noise_mask. Also mentioned in issue #38. This behaviour is now fixed, thanks to @tokkikki