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Non-Linear Metric Learning

This project is the result of the "02460 ADVANCED MACHINE LEARNING" course at DTU.

The code implements the NLMNN algorithm by Kedem et. al., and runs experiements on two different datasets.

Simplex projection

During experiments it was found, that the softmax transformation, proposed by Kedem et. al, had several issues, like slow convergence and local minimas.

Inspired by Yang et. al, we implemet an optimization scheme based on taking the full gradient step, and afterwards do a projection back into the simplex.

See the report for more details.