Source code for cr.sparse._src.dict.comparison
# Copyright 2021 CR-Suite Development Team
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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import jax.numpy as jnp
[docs]def matching_atoms_ratio(A, B, distance_threshold=0.01):
"""Identifies how many atoms are very close between dictionaries A and B
"""
# number of atoms
n_atoms = A.shape[1]
# inner products betweeen atoms of A and B
similarities = jnp.abs(A.T @ B)
# find the best match from each row
max_similarities = jnp.max(similarities, axis=1)
# angular distance between best match
min_distances = 1 - max_similarities
# print(min_distances)
# count how many matches are below the distance threshold
matches = min_distances < distance_threshold
count = sum(matches)
# print(count)
# ratio of matches
return count / n_atoms