Search Results for author: Steven W. Zucker

Found 15 papers, 3 papers with code

Learning dynamic representations of the functional connectome in neurobiological networks

1 code implementation21 Feb 2024 Luciano Dyballa, Samuel Lang, Alexandra Haslund-Gourley, Eviatar Yemini, Steven W. Zucker

We introduce an unsupervised approach to learn the dynamic affinities between neurons in live, behaving animals, and to reveal which communities form among neurons at different times.

Community Detection

Zero-shot generalization across architectures for visual classification

2 code implementations21 Feb 2024 Evan Gerritz, Luciano Dyballa, Steven W. Zucker

Generalization to unseen data is a key desideratum for deep networks, but its relation to classification accuracy is unclear.

Classification Zero-shot Generalization

IAN: Iterated Adaptive Neighborhoods for manifold learning and dimensionality estimation

1 code implementation19 Aug 2022 Luciano Dyballa, Steven W. Zucker

Invoking the manifold assumption in machine learning requires knowledge of the manifold's geometry and dimension, and theory dictates how many samples are required.

Dimensionality Reduction

On Qualitative Shape Inferences: a journey from geometry to topology

no code implementations19 Aug 2020 Steven W. Zucker

Shape inference is classically ill-posed, because it involves a map from the (2D) image domain to the (3D) world.

From Boundaries to Bumps: when closed (extremal) contours are critical

no code implementations16 May 2020 Benjamin Kunsberg, Steven W. Zucker

Invariants underlying shape inference are elusive: a variety of shapes can give rise to the same image, and a variety of images can be rendered from the same shape.

Feature Selection Facilitates Learning Mixtures of Discrete Product Distributions

no code implementations25 Nov 2017 Vincent Zhao, Steven W. Zucker

Feature selection can facilitate the learning of mixtures of discrete random variables as they arise, e. g. in crowdsourcing tasks.

feature selection

Critical Contours: An Invariant Linking Image Flow with Salient Surface Organization

no code implementations20 May 2017 Benjamin S. Kunsberg, Steven W. Zucker

We further show that, under this model, the contours partition the surface into meaningful parts using the Morse--Smale complex.

What's In A Patch, II: Visualizing generic surfaces

no code implementations16 May 2017 Benjamin S. Kunsberg, Daniel Niels Holtmann-Rice, Steven W. Zucker

The parameters for the subspace and rotation matrix encapsulate the ambiguity in the shading problem.

What's In A Patch, I: Tensors, Differential Geometry and Statistical Shading Analysis

no code implementations16 May 2017 Daniel Niels Holtmann-Rice, Benjamin S. Kunsberg, Steven W. Zucker

We develop a linear algebraic framework for the shape-from-shading problem, because tensors arise when scalar (e. g. image) and vector (e. g. surface normal) fields are differentiated multiple times.

Stagewise Learning for Sparse Clustering of Discretely-Valued Data

no code implementations9 Jun 2015 Vincent Zhao, Steven W. Zucker

The performance of EM in learning mixtures of product distributions often depends on the initialization.

Clustering

Feedforward Learning of Mixture Models

no code implementations NeurIPS 2014 Matthew Lawlor, Steven W. Zucker

We develop a biologically-plausible learning rule that provably converges to the class means of general mixture models.

Third-Order Edge Statistics: Contour Continuation, Curvature, and Cortical Connections

no code implementations NeurIPS 2013 Matthew Lawlor, Steven W. Zucker

Association field models have been used to explain human contour grouping performance and to explain the mean frequency of long-range horizontal connections across cortical columns in V1.

Characterizing Ambiguity in Light Source Invariant Shape from Shading

no code implementations23 Jun 2013 Benjamin Kunsberg, Steven W. Zucker

Shape from shading is a classical inverse problem in computer vision.

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