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Andrew K. Saydjari

dblp:290/8266 · DBLP profile ↗
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1ranked-venue papers
1as first author
1since 2021 · last 2023
0000-0002-6561-9002ORCID · reported

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 1 · 1 first-author · 1 since 2021

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Artificial intelligence
1 paper
Representation and self-supervised learning · 77% Image recognition and object detection · 23%
Computer graphics and multimedia
1 paper
Multimedia analysis and retrieval · 100%

Topics — the 3 heaviest of 3, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Machine learning › Representation and self-supervised learning › equivariance
equivariant representation
0.712023
Equivariant Wavelets: Fast Rotation and Translation Invariant Wavelet Scattering Transforms · IEEE Trans. Pattern Anal. Mach. Intell. 2023
Multimedia analysis and retrieval
image analysis
0.712023
Equivariant Wavelets: Fast Rotation and Translation Invariant Wavelet Scattering Transforms · IEEE Trans. Pattern Anal. Mach. Intell. 2023
Computer vision › Image recognition and object detection
image classification
0.212023
Equivariant Wavelets: Fast Rotation and Translation Invariant Wavelet Scattering Transforms · IEEE Trans. Pattern Anal. Mach. Intell. 2023

Methods — techniques the papers use, named apart from their topics

wavelet scattering · 1.3linear classifier · 1.3equivariant filter bank · 1.3
YearPublicationVenuePosition
2023 Equivariant Wavelets: Fast Rotation and Translation Invariant Wavelet Scattering Transforms
abstract
Wavelet scattering networks, which are convolutional neural networks (CNNs) with fixed filters and weights, are promising tools for image analysis. Imposing symmetry on image statistics can improve human interpretability, aid in generalization, and provide dimension reduction. In this work, we introduce a fast-to-compute, translationally invariant and rotationally equivariant wavelet scattering network (EqWS) and filter bank of wavelets (triglets). We demonstrate the interpretability and quantify the invariance/equivariance of the coefficients, briefly commenting on difficulties with implementing scale equivariance. On MNIST, we show that training on a rotationally invariant reduction of the coefficients maintains rotational invariance when generalized to test data and visualize residual symmetry breaking terms. Rotation equivariance is leveraged to estimate the rotation angle of digits and reconstruct the full rotation dependence of each coefficient from a single angle. We benchmark EqWS with linear classifiers on EMNIST and CIFAR-10/100, introducing a new second-order, cross-color channel coupling for the color images. We conclude by comparing the performance of an isotropic reduction of the scattering coefficients and RWST, a previous coefficient reduction, on an isotropic classification of magnetohydrodynamic simulations with astrophysical relevance.
Andrew K. Saydjari, Douglas P. Finkbeiner
IEEE Trans. Pattern Anal. Mach. Intell.1