Multiplier tuning postprocessing for machine learning bias mitigation

A method comprising:

• generating, by a bi-objective optimizer, a first multiplier for a first class of a plurality of mutually exclusive classes and a second multiplier for a second class of the plurality of mutually exclusive classes;
• generating, from an input, an inference that contains a probability of the first class and a probability of the second class;
• and
• classifying the input based on:
• a first multiplicative product of the probability of the first class and the first multiplier, and
• a second multiplicative product of the probability of the second class and the second multiplier;
• wherein the method is performed by one or more computers.

One or more non-transitory computer-readable media storing instructions that, when executed by one or more processors, cause:

• inferring, from an input that contains a value of a feature that has a plurality of multipliers, a probability of a class;
• selecting based on the value of the feature in the input, from the plurality of multipliers of the feature, a multiplier that is specific to both of the feature and the value of the feature;
• and
• classifying the input based on a multiplicative product of the probability of the class and the multiplier that is specific to both of the feature and the value of the feature.

One or more non-transitory computer-readable media storing instructions that, when executed by one or more processors, cause:

• generating, by a bi-objective optimizer, a first multiplier for a first class of a plurality of mutually exclusive classes and a second multiplier for a second class of the plurality of mutually exclusive classes;
• generating, from an input, an inference that contains a probability of the first class and a probability of the second class;
• and
• classifying the input based on:
• a first multiplicative product of the probability of the first class and the first multiplier, and
• a second multiplicative product of the probability of the second class and the second multiplier.