Measuring (in)variances in convolutional networks

Título:

Measuring (in)variances in convolutional networks

Autor:

Quiroga, Facundo Manuel

Colaboradores:

; Torrents-Barrena, Jordina; Lanzarini, Laura Cristina; Puig, Domenec

Temas:

REDES NEURONALESREDES

En:

Conference Cloud Computing and Big Data (7ª : 2019 : La Plata, Argentina)

Resumen:

Convolutional neural networks (CNN) offer state-of-the-art performance in various computer vision tasks such as activity recognition, face detection, medical image analysis, among others. Many of those tasks need invariance to image transformations (i.e.. rotations, translations or scaling). This work proposes a versatile, straightforward and interpretable measure to quantify the (in)variance of CNN activations with respect to transformations of the input. Intermediate output values of feature maps and fully connected layers are also analyzed with respect to different input transformations. The technique is applicable to any type of neural network and/or transformation. Our technique is validated on rotation transformations and compared with the relative (in)variance of several networks. More specifically, ResNet, AllConvolutional and VGG architectures were trained on CIFAR10 and MNIST databases with and without rotational data augmentation. Experiments reveal that rotation (in)variance of CNN outputs is class conditional. A distribution analysis also shows that lower layers are the most invariant, which seems to go against previous guidelines that recommend placing invariances near the network output and equivariances near the input.

URL/DOI:

Medio:

Soporte electrónico

Tipo de documento:

Artículo

Descripción física:

1 archivo (1,2 MB)

Idioma:

Inglés

Publicación:

, 2019

Puede solicitar más fácilmente el ejemplar con: A1139