Search Results for author: Tomojit Ghosh

Found 6 papers, 0 papers with code

Sparse Linear Centroid-Encoder: A Convex Method for Feature Selection

no code implementations7 Jun 2023 Tomojit Ghosh, Michael Kirby, Karim Karimov

In the first step, we solve the linear Centroid-Encoder, a convex optimization problem over a matrix $A$.

feature selection

Feature Selection using Sparse Adaptive Bottleneck Centroid-Encoder

no code implementations7 Jun 2023 Tomojit Ghosh, Michael Kirby

During training, we update class centroids by taking the Hadamard product of the centroids and weights of the sparse layer, thus ignoring the irrelevant features from the target.

feature selection

Sparse Centroid-Encoder: A Nonlinear Model for Feature Selection

no code implementations30 Jan 2022 Tomojit Ghosh, Michael Kirby

The resulting algorithm, Sparse Centroid-Encoder (SCE), extracts discriminatory features in groups using a sparsity inducing $\ell_1$-norm while mapping a point to its class centroid.

Attribute Dimensionality Reduction +1

Robust Feature Selection using Sparse Centroid-Encoder

no code implementations29 Sep 2021 Tomojit Ghosh, Michael Kirby

We develop a sparse optimization problem for the determination of the total set of features that discriminate two or more classes.

feature selection

Supervised Dimensionality Reduction and Visualization using Centroid-encoder

no code implementations27 Feb 2020 Tomojit Ghosh, Michael Kirby

The Centroid-Encoder (CE) method is similar to the autoencoder but incorporates label information to keep objects of a class close together in the reduced visualization space.

Data Visualization Retrieval +1

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