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1st International Workshop on Reading Music Systems

[WORMS]

Paris, September 20

PRAIg '18 / +pics

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11th international workshop on Machine Learning and Music

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Stockholm: 13-15th July 2018

Publications:

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  1. Gallego, A.J.; Pertusa, A.; Calvo-Zaragoza, J.
    "Improving Convolutional Neural Networks’ Accuracy in Noisy Environments Using k-Nearest Neighbors"
    Applied Sciences, vol. 8 (2018)
    : bibtex : URL
    Abstract:

    We present a hybrid approach to improve the accuracy of Convolutional Neural Networks (CNN) without retraining the model. The proposed architecture replaces the softmax layer by a k-Nearest Neighbor (kNN) algorithm for inference. Although this is a common technique in transfer learning, we apply it to the same domain for which the network was trained. Previous works show that neural codes (neuron activations of the last hidden layers) can benefit from the inclusion of classifiers such as support vector machines or random forests. In this work, our proposed hybrid CNN + kNN architecture is evaluated using several image datasets, network topologies and label noise levels. The results show significant accuracy improvements in the inference stage with respect to the standard CNN with noisy labels, especially with relatively large datasets such as CIFAR100. We also verify that applying the ℓ2 norm on neural codes is statistically beneficial for this approach.

@article {
 author = "Gallego, A.J.; Pertusa, A.; Calvo-Zaragoza, J.",
 title  = "Improving Convolutional Neural Networks’ Accuracy in Noisy Environments Using k-Nearest Neighbors",
 issn = "2076-3417",
 journal = "Applied Sciences",
 number = "11",
 volume = "8",
 year = "2018"
}
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