Search Results for author: Anders Christensen

Found 6 papers, 5 papers with code

DiffEnc: Variational Diffusion with a Learned Encoder

1 code implementation30 Oct 2023 Beatrix M. G. Nielsen, Anders Christensen, Andrea Dittadi, Ole Winther

Diffusion models may be viewed as hierarchical variational autoencoders (VAEs) with two improvements: parameter sharing for the conditional distributions in the generative process and efficient computation of the loss as independent terms over the hierarchy.

Image-free Classifier Injection for Zero-Shot Classification

1 code implementation ICCV 2023 Anders Christensen, Massimiliano Mancini, A. Sophia Koepke, Ole Winther, Zeynep Akata

We achieve this with our proposed Image-free Classifier Injection with Semantics (ICIS) that injects classifiers for new, unseen classes into pre-trained classification models in a post-hoc fashion without relying on image data.

Classification Image Classification +1

Addressing caveats of neural persistence with deep graph persistence

1 code implementation20 Jul 2023 Leander Girrbach, Anders Christensen, Ole Winther, Zeynep Akata, A. Sophia Koepke

Whilst this captures useful information for linear classifiers, we find that no relevant spatial structure is present in later layers of deep neural networks, making neural persistence roughly equivalent to the variance of weights.

Topological Data Analysis

Incorporating High-Frequency Weather Data into Consumption Expenditure Predictions

no code implementations6 Oct 2022 Anders Christensen, Joel Ferguson, Simón Ramírez Amaya

Recent efforts have been very successful in accurately mapping welfare in datasparse regions of the world using satellite imagery and other non-traditional data sources.

Vocal Bursts Intensity Prediction

Optimal Variance Control of the Score-Function Gradient Estimator for Importance-Weighted Bounds

1 code implementation NeurIPS 2020 Valentin Liévin, Andrea Dittadi, Anders Christensen, Ole Winther

Empirically, for the training of both continuous and discrete generative models, the proposed method yields superior variance reduction, resulting in an SNR for IWAE that increases with $K$ without relying on the reparameterization trick.

Optimal Variance Control of the Score Function Gradient Estimator for Importance Weighted Bounds

1 code implementation5 Aug 2020 Valentin Liévin, Andrea Dittadi, Anders Christensen, Ole Winther

This paper introduces novel results for the score function gradient estimator of the importance weighted variational bound (IWAE).

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