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EQUIVARIANT & COORDINATE INDEPENDENT CONVOLUTIONAL NETWORKS
0 - Default Title
Description
Feature vector fields: The spatial signals we are interested in are fields of feature vectors. Feature fields allow to describe data like images, audio, videos, point clouds, or tensor fields, such as fluid flows and electromagnetic fields.
Equivariant networks commute with actions of some symmetry group on their feature spaces. The relevant group actions in this work are geometric transformations of feature fields, like translations, rotations, or reflections of images. Equivariant models generalize everything they learn over the considered group of transformations. This property makes them significantly more data efficient, interpretable, and robust in comparison to non-equivariant models.
Convolutional Neural Networks (CNNs) are the most common network architecture for processing feature fields. Conventional CNNs operate on Euclidean spaces and are translation equivariant, i.e. position independent. This work explains how to extend CNNs to be equivariant under more general symmetries of space.
Coordinate independence: Manifolds are in general not equipped with a canonical choice of coordinates. Feature fields and neural network layers are hence required to be coordinate independent, that is, expressible relative to different frames of reference. The ambiguity of local frames represents the gauge freedom of our neural field theory. We show that the demand for coordinate independence requires CNNs to be equivariant under local gauge transformations.
Product details
Number of Pages:
592
Release Date:
2025-12-13
Publication Date:
2026-01-15
Publisher:
World Scientific
Languages:
Original:
English
ISBN10:
9819806623
ISBN13:
9789819806621
GPSR Manufacturer Reference:
Weight:
997 g
Height:
157 cm
Width:
235 cm
Thickness:
36 cm
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